Sand blocking and fixing belt protection system stability development trend evaluation method and related device

Abstract

The invention discloses a sand-blocking and sand-fixing belt protection system stability development trend evaluation method and a related device, and relates to the technical field of ecological protection system maintaining.The method comprises the steps that according to current stability evaluation indexes and stability driving factor evaluation indexes, the weight of each evaluation index is determined through an analytic hierarchy process; then, determining the score of each evaluation index through field investigation, and determining a current stability score and a stability driving factor score according to the score and the weight of each evaluation index; and finally, determining a stability development trend score according to the current stability score, the stability driving factor score and respective weights. The method can accurately reveal the stability development trend of the sand-blocking and sand-fixing belt protection system and main problems and risks faced in development, can allow researchers to score and research targeted optimization strategies according to the development trend, and provides a scientific basis for related management departments in sand prevention and control, resource allocation and policy adjustment.

Description

Technical Field

[0001] The present application relates to the technical field of ecological protection system maintenance, and in particular to a method for evaluating the stability development trend of a sand-fixing belt protection system and related devices. Background Art

[0002] Oasis, as an artificially constructed ecosystem on the background matrix of desert, has a front ecological barrier, the sand-fixing belt, which is a comprehensive wind-proof and sand-fixing system composed of a series of protective measures, such as shelterbelts, sand barriers and enclosures. As a critical ecological buffer zone between oasis and desert ecosystems, the sand-fixing belt exhibits significant wind-sand transport phenomena and the edge effect of ecological factors.

[0003] In practical applications, systematically evaluating the stability of the sand-blocking and sand-fixing belt protection system and timely discovering and solving potential problems that affect the stability of the protection system are the core elements to ensure the sustainable development of the protection system. Although many studies have focused on the stability analysis of oasis ecosystems, there are very few studies on sand-blocking and sand-fixing belts on the edge of oasis. In general, a mature and unified evaluation framework has not yet been established for stability assessment. The understanding and identification methods of ecosystem stability are still in the preliminary exploration stage, lacking a solid theoretical foundation and technical support. As for the stability evaluation research of sand-blocking and sand-fixing belts, there has been no relevant report so far. Therefore, the present invention proposes a method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system and related devices, aiming to comprehensively and systematically evaluate the stability of the sand-blocking and sand-fixing belt protection system, thereby providing a theoretical basis for formulating scientific and reasonable maintenance and management strategies. Summary of the invention

[0004] The purpose of this application is to provide a method and related devices for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system, which can comprehensively and systematically evaluate the stability of a sand-blocking and sand-fixing belt protection system and provide a theoretical basis for formulating scientific and reasonable maintenance and management strategies.

[0005] To achieve the above objectives, this application provides the following solutions:

[0006] In a first aspect, the present application provides a method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system, comprising the following steps:

[0007] Based on the field investigation of the sand-fixing belt protection system and the evaluation of research data, several current stability evaluation indicators and several stability driving factor evaluation indicators are determined.

[0008] The analytic hierarchy process is used to determine the weights of each current stability evaluation index and the weights of each stability driving factor evaluation index.

[0009] Based on the on-site investigation of the sand-blocking and sand-fixing belt protection system, the scores of each current stability evaluation index and the scores of each stability driving factor evaluation index are determined.

[0010] The current stability score is determined based on the scores of each current stability evaluation indicator and the corresponding weights of the current stability evaluation indicators.

[0011] The stability driving factor score is determined based on the score of each stability driving factor evaluation indicator and the corresponding weight of the stability driving factor evaluation indicator.

[0012] Determine the stability development trend score based on the current stability score, stability driver score and their respective weights.

[0013] Optionally, the current stability evaluation indicators include: several protection system integrity evaluation indicators, several artificial forest evaluation indicators, several mechanical sand barrier evaluation indicators and several closed-off area natural vegetation evaluation indicators; the stability driving factor evaluation indicators include: several climate factor evaluation indicators, several hydrological factor evaluation indicators, several soil factor evaluation indicators, several natural disaster factor evaluation indicators and several management factor evaluation indicators.

[0014] Optionally, according to the scores of each current stability evaluation indicator and the corresponding weights of the current stability evaluation indicator, the current stability score is determined, specifically including the following steps:

[0015] The protection system integrity score is determined based on the scores of each protection system integrity evaluation indicator and the corresponding weight of the protection system integrity evaluation indicator.

[0016] The plantation forest score is determined based on the scores of each plantation forest evaluation indicator and the corresponding weight of the plantation forest evaluation indicator.

[0017] The mechanical sand barrier score is determined based on the scores of each mechanical sand barrier evaluation indicator and the corresponding weight of the mechanical sand barrier evaluation indicator.

[0018] The natural vegetation score of the closed-off area is determined based on the scores of the natural vegetation evaluation indicators of each closed-off area and the corresponding weights of the natural vegetation evaluation indicators of the closed-off area.

[0019] The current stability score is determined based on the protection system integrity score, artificial forest score, mechanical sand barrier score, closed-off area natural vegetation score and their respective weights.

[0020] Optionally, according to the scores of the evaluation indicators of each stability driving factor and the weights of the corresponding evaluation indicators of the stability driving factor, the stability driving factor score is determined, which specifically includes the following steps:

[0021] The climate factor score is determined based on the score of each climate factor evaluation indicator and the corresponding climate factor evaluation indicator weight.

[0022] The hydrological factor score is determined based on the score of each hydrological factor evaluation indicator and the corresponding weight of the hydrological factor evaluation indicator.

[0023] The soil factor score is determined based on the score of each soil factor evaluation index and the corresponding weight of the soil factor evaluation index.

[0024] The natural disaster factor score is determined based on the score of each natural disaster factor evaluation indicator and the corresponding weight of the natural disaster factor evaluation indicator.

[0025] The management factor score is determined based on the score of each management factor evaluation indicator and the weight of the corresponding management factor evaluation indicator.

[0026] The stability driving factor score is determined based on the climate factor score, hydrological factor score, soil factor score, natural disaster factor score, management factor score and their respective weights.

[0027] Optionally, the evaluation indicators for the integrity of the protection system include: the width and lateral continuity of the sand-fixing belt; the evaluation indicators for artificial forests include: tree species selection, tree species composition, existing density, afforestation pattern, development stage, planting site configuration, deadtop rate, root exposure degree, natural regeneration capacity of vegetation and species richness of natural vegetation in the forest; the evaluation indicators for mechanical sand barriers include: damage rate; the evaluation indicators for natural vegetation in the closed-off area include: coverage, species richness, Simpson evenness index, number of layers and development stage of white thorn shrub sand piles; the evaluation indicators for climate factors include: average annual precipitation, annual dryness and annual sandstorm wind speed; the evaluation indicators for hydrological factors include: groundwater level; the evaluation indicators for soil factors include: average moisture content of shallow soil, surface fluidity and disintegration of more than 1 / 3 of shrub sand piles; the evaluation indicators for natural disaster factors include: natural disasters; the evaluation indicators for management factors include: protection system closure measures, nurturing and protection, whether the forest chief system is implemented, publicity of ecological construction policies and groundwater use control.

[0028] Optionally, the method for evaluating the stability development trend of the sand-blocking and sand-fixing belt protection system further includes the following steps:

[0029] According to the stability development trend score and the development trend score threshold, the stability development trend of the sand-fixing belt protection system is determined, and the scores of each current stability evaluation index and each stability driving factor evaluation index are displayed in a visual way.

[0030] In the second aspect, the present application provides a sand-blocking and sand-fixing belt protection system stability development trend evaluation system, which is used to implement the sand-blocking and sand-fixing belt protection system stability development trend evaluation method described above. The system includes the following modules:

[0031] The evaluation index screening and determination module is used to determine several current stability evaluation indicators and several stability driving factor evaluation indicators based on the field investigation of the sand-blocking and sand-fixing belt protection system and the evaluation of research data.

[0032] The evaluation index weight determination module is used to determine the weight of each current stability evaluation index and the weight of each stability driving factor evaluation index by adopting the hierarchical analysis method.

[0033] The evaluation index score determination module is used to determine the scores of various current stability evaluation indicators and the scores of various stability driving factor evaluation indicators based on the field investigation of the sand-blocking and sand-fixing belt protection system.

[0034] The current stability score determination module is used to determine the current stability score according to the scores of each current stability evaluation indicator and the corresponding weights of the current stability evaluation indicators.

[0035] The stability driving factor score determination module is used to determine the stability driving factor score based on the score of each stability driving factor evaluation indicator and the weight of the corresponding stability driving factor evaluation indicator.

[0036] The stability development trend score determination module is used to determine the stability development trend score based on the current stability score, the stability driving factor score and their respective weights.

[0037] In a third aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for evaluating the stability development trend of a sand-fixing belt protection system as described above.

[0038] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system as described above.

[0039] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the method for evaluating the stability development trend of the sand-fixing belt protection system described above.

[0040] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0041] The present application provides a method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system and a related device. In the method, for the determined current stability evaluation index and stability driving factor evaluation index, a hierarchical analysis method is used to determine the weight of each evaluation index, aiming to comprehensively and accurately reflect the stability of the sand-blocking and sand-fixing belt protection system; then, based on field investigations, the scores of each evaluation index are determined, and the current stability score is determined based on the scores and weights of each current stability evaluation index, while the stability driving factor score is determined based on the scores and weights of each stability driving factor evaluation index; finally, a stability development trend score is determined based on the current stability score, the stability driving factor score and their respective weights, which can accurately reveal the stability development trend of the sand-blocking and sand-fixing belt protection system and the main problems and risks faced in its development, and can provide researchers with targeted optimization strategies based on the stability development trend score, and provide a scientific basis for relevant management departments in sand prevention and control, resource allocation and policy adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A flow chart of a method for evaluating the stability development trend of a sand-fixing belt protection system provided in one embodiment of the present application.

[0044] Figure 2 A schematic diagram of a sand-blocking and sand-fixing belt stability development trend evaluation system in a sand-blocking and sand-fixing belt protection system stability development trend evaluation method provided in one embodiment of the present application.

[0045] Figure 3 A detailed flow chart of step S4 in a method for evaluating the stability development trend of a sand-fixing belt protection system provided in one embodiment of the present application.

[0046] Figure 4 A detailed flow chart of step S5 in a method for evaluating the stability development trend of a sand-fixing belt protection system provided in one embodiment of the present application.

[0047] Figure 5 A schematic diagram of the functional modules of a system for evaluating the stability development trend of a sand-fixing belt protection system provided in one embodiment of the present application.

[0048] Figure 6 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0051] In an exemplary embodiment, the present application provides a method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system. The method is executed by a computer device, and can be executed by a computer device such as a terminal or a server alone, or by a terminal and a server together. Figure 1 As shown, the method comprises the following steps:

[0052] S1. According to the field investigation of the sand-blocking and sand-fixing belt protection system and the evaluation of research data, several current stability evaluation indicators and several stability driving factor evaluation indicators are determined. Specifically in this embodiment, the various indicators that affect the stability development trend of the sand-blocking and sand-fixing belt are preliminarily determined through field investigation in the early stage. In order to ensure the scientificity, objectivity and professionalism of the evaluation indicators, relevant experts in the industry can be invited to review and evaluate the selected evaluation indicators to obtain the final evaluation system for the stability development trend of the sand-blocking and sand-fixing belt, such as Figure 2 As shown in the figure, the stability development trend A of the sand-fixing belt protection system depends on two aspects: the current stability scoring index B1 and the stability driving factor scoring index B2. These two first-level indicators each include several second-level indicators C1~C10, and each second-level indicator can be further divided into several third-level indicators D1~D32.

[0053] In this embodiment, the current stability evaluation index B1 includes: several protection system integrity evaluation indicators, several artificial forest evaluation indicators, several mechanical sand barrier evaluation indicators and several closed-off area natural vegetation evaluation indicators; each protection system integrity evaluation indicator is used to determine the protection system integrity score C1, each artificial forest evaluation indicator is used to determine the artificial forest score C2, each mechanical sand barrier evaluation indicator is used to determine the mechanical sand barrier score C3, and each closed-off area natural vegetation evaluation indicator is used to determine the closed-off area natural vegetation score C4.

[0054] The specific evaluation indicators of the protection system integrity include: the width of the sand-fixing belt D1 and the lateral continuity D2; the specific evaluation indicators of artificial forests include: tree species selection D3, tree species composition D4, existing density D5, afforestation mode D6, development stage D7, planting point configuration D8, deadtop rate D9, root exposure degree D10, natural regeneration capacity of vegetation D11 and species richness of natural vegetation in the forest D12; the specific evaluation indicators of mechanical sand barriers include: damage rate D13; the specific evaluation indicators of natural vegetation in the closed area include: coverage D14, species richness D15, Simpson evenness index D16, number of layers D17 and development stage of white thorn shrub sand piles D18.

[0055] The stability driving factor evaluation index B2 includes: several climate factor evaluation indexes, several hydrological factor evaluation indexes, several soil factor evaluation indexes, several natural disaster factor evaluation indexes and several management factor evaluation indexes. Each climate factor evaluation index is used to determine the climate factor score C5, each hydrological factor evaluation index is used to determine the hydrological factor score C6, each soil factor evaluation index is used to determine the soil factor score C7, each natural disaster factor evaluation index is used to determine the natural disaster factor score C8, and each management factor evaluation index is used to determine the management factor score C9.

[0056] The specific evaluation indicators of climate factors include: average annual precipitation D19, annual dryness D20 and annual sandstorm speed D21; the specific evaluation indicators of hydrological factors include: groundwater level D22; the specific evaluation indicators of soil factors include: average moisture content of shallow soil D23, surface fluidity D24 and disintegration of more than 1 / 3 of shrub sand piles D25; the specific evaluation indicators of natural disaster factors include: natural disasters D26; the specific evaluation indicators of management factors include: protection system closure measures D27, nurturing and protection D28, whether the forest chief system is implemented D29, publicity of ecological construction policies D30 and groundwater use control D31.

[0057] S2. Use the analytic hierarchy process to determine the weights of each current stability evaluation index and the weights of each stability driving factor evaluation index. The analytic hierarchy process is a mathematical tool that combines qualitative and quantitative analysis based on expert experience. It can decompose complex decision-making problems into multiple levels as a system, such as Figure 2The indicators at all levels shown in the table are divided into the first level by the current stability scoring index B1 and the stability driving factor scoring index B2 of the two first-level indicators, the second level evaluation indicators C1~C9 are the second level, and the third level evaluation indicators D1~D31 are the more detailed third level. Through expert scoring, the matrix judgment and consistency test of each level are carried out, and the weight of each level to the overall goal is calculated by mathematical methods. According to the evaluation index system of the stability development trend of the sand-blocking and sand-fixing belt, a scoring matrix is ​​constructed. 20 relevant experts are invited to compare the importance of each level indicator relative to the upper level indicator according to their experience, and then score according to the importance level and scoring criteria shown in Table 1.

[0058] Table 1 Importance level and scoring criteria

[0059] Scale meaning 1 Indicates that two elements have the same importance. 3 Indicates that compared with two elements, the former is slightly more important than the latter 5 Indicates that compared with two elements, the former is obviously more important than the latter 7 Indicates that compared with two elements, the former is extremely important than the latter 9 Indicates that compared with two elements, the former is more important than the latter 2,4,6,8 Indicates the middle value of the above adjacent judgments Count down from 1 to 9 Indicates the importance of comparing the corresponding two factors in exchange order

[0060] The scores were processed, and the judgment matrix was subjected to a hierarchical single-rank consistency test and a hierarchical total-rank consistency test to determine whether the interrelationships between the indicators can be quantitatively transferred. The total ranking calculation results of the evaluation indicators at each level in the evaluation system for the stability development trend of the sand-fixing belt are shown in Tables 2, 3, and 4. Table 2 shows the weights of each secondary indicator and each tertiary indicator under the current stability scoring indicator B1, Table 3 shows the weights of each secondary indicator and each tertiary indicator under the stability driving factor scoring indicator B2, and Table 4 shows the weights of the current stability scoring indicator B1 and the stability driving factor scoring indicator B2 in the stability development trend score.

[0061] Table 2 Weights of various indicators under the current stability scoring index B1

[0062]

[0063]

[0064] Table 3 Weights of various indicators under stability driving factor scoring indicator B2

[0065]

[0066] Table 4 Weights of the two first-level indicators under the stability development trend score A

[0067]

[0068]

[0069] S3. Based on the field investigation of the sand-fixing belt protection system, determine the scores of each current stability evaluation index and the scores of each stability driving factor evaluation index.

[0070] Determine the score for the width D1 of the sand-fixing belt: Sand-fixing measures include three types: building artificial forests, laying mechanical sand barriers, and closed-off protection. Since the closed-off protection belt has no clear upper boundary, the width of the sand-fixing belt only counts the span of "artificial forests + mechanical sand barriers" in the protection direction. When W>1000m, 1 point is given; 1000≥W>500m, 0.8 points; 500≥W>300m, 0.6 points; 300≥W>100m, 0.4 points; W≤100m, 0 points.

[0071] Determine the score of horizontal continuity D2: The horizontal direction refers to the direction consistent with the edge of the oasis. It is difficult for the two ends of the protection system to form a group effect, with poor stability, weak resistance, and easy to be disturbed by the outside world. Continuity can be indirectly reflected by the horizontal continuous length, represented by the symbol L. L>600m gets 1 point; 600≥L>300m gets 0.6 points; 300≥L>100m gets 0.3 points; L≤100m gets 0 points.

[0072] Determine the score of tree species selection D3: Under the special site conditions and wind and sand environment of the sand-blocking and sand-fixing belt, native tree species may not be suitable for sand-blocking and sand-fixing. Only successful afforestation tree species proven in practice meet the principle of suitable trees for suitable places. The evaluation of tree species selection should also be combined with the afforestation location. For example, Elaeagnus angustifolia and poplar can be planted on the edge of the oasis, but it is not suitable to be planted in areas far away from the oasis like Haloxylon ammodendron. Successful afforestation tree species proven in practice will receive 1 point; native tree species (risky) will receive 0.5 points; introduced species (high risk) will receive 0 points.

[0073] Determine the score of tree species composition D4: if the tree species composition in the sand-fixing belt is mixed forest, 1 point will be awarded; if it is pure forest, 0 point will be awarded.

[0074] Determine the score of existing density D5: if existing density = healthy mature forest density in the assessment area, 1 point will be awarded; if healthy mature forest density in the assessment area > existing density > relevant standard, 0.6 point will be awarded; if existing density > healthy mature forest density in the assessment area, 0.3 point will be awarded; if existing density < relevant standard, 0 point will be awarded.

[0075] Determine the score of afforestation pattern D6: 1 point for row-band pattern; 0.7 points for uniform distribution; and 0 points for random distribution.

[0076] Determine the score of development stage D7: for desert plantations, the seedling-sapling stage is 1-5 years after the survival of the seedlings and afforestation, and the overmature forest stage is characterized by slower growth and reduced health of trees; the seedling-sapling stage is scored 0.5 points; the young forest-middle-aged forest-mature forest stage is scored 1 point; the overmature forest stage is scored 0 points.

[0077] Determine the score of planting point configuration D8: 1 point for triangle configuration; 0.5 point for rectangle configuration; 0 point for vegetation group configuration.

[0078] Determine the score of the withered tip rate D9: No withered tip gets 1 point; withered tip length < 20 cm gets 0.7 points; withered tip length < 40 cm and withered branch rate > 50% gets 0.5 points; withered tip length > 40 cm and withered branch rate > 50% gets 0.3 points; the base of the branch survives gets 0 points.

[0079] Determine the score of the root exposure degree D10: No exposure gets 1 point; root exposure < 20 cm gets 0.7 points; 20 cm < root exposure < 40 cm gets 0.5 points; 40 cm < root exposure < 60 cm gets 0.3 points; root exposure > 60 cm gets 0 points.

[0080] Determine the score of the natural regeneration ability D11 of the plant: Having renewal seedlings gets 1 point; having no renewal seedlings gets 0 points.

[0081] Determine the score of the species richness D12 of the natural vegetation in the enclosed area: Calculate the species richness S1 of the natural vegetation in the enclosed area. The quadrat size is 20m * 20m, and rare species are not counted; S1 ≥ 10 gets 1 point; 10 > S1 ≥ 5 gets 0.5 points; S1 < 5 gets 0 points.

[0082] Determine the score of the breakage rate D13: Breakage rate < 5% gets 1 point; 5% ≤ breakage rate < 20% gets 0.8 points; 20% ≤ breakage rate < 50% gets 0.5 points; breakage rate > 50% gets 0 points.

[0083] The survey range of the indicators in the following natural vegetation index layer of the enclosed area is within 300 m upwind of "planted forest + mechanical sand barriers". When no enclosure measures are taken for the natural vegetation, since it has a protective effect on the oasis, it is still included in the composition of the protection system when evaluating stability, and the survey range of the indicators remains unchanged.

[0084] Determine the score of the coverage D14: Calculate the coverage C, C > 10% gets 1 point; 10% ≥ C > 5% gets 0.6 points; C ≤ 5% gets 0 points.

[0085] Determine the score of the species richness D15: Calculate the species richness S2, the quadrat size is 20m * 20m, and rare species are not counted. S2 ≥ 10 gets 1 point; 10 > S2 ≥ 5 gets 0.5 points; S2 < 5 gets 0 points.

[0086] Determine the score of the Simpson evenness index D16: Used to measure the closeness of different species in terms of quantity, calculated using the Simpson evenness index. 0.75 < D ≤ 1 gets 1 point; 0.5 < D ≤ 0.75 gets 0.7 points; 0.25 < D ≤ 0.5 gets 0.4 points; 0 < D ≤ 0.25 gets 0 points.

[0087] Determine the score of the number of strata D17: Three or more strata consist of a herb layer, a small shrub layer, a large shrub layer, and a tree layer; two strata include a herb layer and a small shrub layer; one stratum is the herb layer. Three or more strata get 1 point; two strata get 0.5 point; one stratum gets 0 point.

[0088] Determine the score of the development stage of Nitraria shrub sand dunes D18: Characteristics of the initial stage: Obvious sand accumulation appears at the roots of Nitraria, the height of sand accumulation < the estimated average height of Nitraria, and a wind shadow area is formed on the leeward side of the sand dune; Characteristics of the development stage: The height of sand accumulation > the estimated average height of Nitraria, new branches develop well, and the coverage of Nitraria accounts for more than 30% of the surface area of the sand dune; Characteristics of the stable stage: Nitraria grows well, the topsoil of the non-Nitraria-covered part is compacted, forming the basis for crust development or the crust has been formed; Characteristics of the degradation stage: The crust is damaged, a substantial wind erosion gap appears on the sand dune, Nitraria grows poorly, and the coverage area of dead branches accounts for more than 30% of the total coverage of Nitraria. The four development stages may coexist in the same sand fixation and sand blocking belt. Select the main development stage as the basis for scoring; The initial stage gets 0.25 point; The development stage gets 0.85 point; The stable stage gets 1 point; The degradation stage gets 0 point.

[0089] Determine the score of the average annual precipitation D19: Query the local average annual precipitation P through the meteorological department. P≥400mm gets 1 point; 300mm≤P<400mm gets 0.8 point; 200mm≤P<300mm gets 0.6 point; 100mm≤P<200mm gets 0.3 point; P<100mm gets 0 point.

[0090] Determine the score of the annual aridity D20: According to relevant standards, the climate dry-wet degree is expressed by aridity, and aridity K = maximum possible evaporation / precipitation; K<1 is a humid climate, 1.0≤K<1.6 is a sub-humid climate, 1.6≤K<3.5 is a sub-arid climate, 3.5≤K<16 is an arid climate, K≥16 is an extremely arid climate; K<1 gets 1 point; 1.0≤K<1.6 gets 0.8 point; 1.6≤K<3.5 gets 0.6 point; 3.5≤K<16 gets 0.3 point; K≥16 gets 0 point.

[0091] Determine the score of the annual sand-blowing wind speed D21: Calculate the annual sand-blowing wind speed U within the sand fixation and sand blocking belt. When 5m / s<U<6m / s gets 1 point; 6m / s≤U<7m / s gets 0.85 point; 7m / s≤U<8m / s gets 0.7 point; 8m / s≤U<9m / s gets 0.5 point; 9m / s≤U<10m / s gets 0.2 point; U≥10m / s gets 0 point.

[0092] Determine the score of the groundwater level D22: Calculate the groundwater level WT. 40cm is the average height of capillary rise of sandy soil. WT < the biological root length of the afforestation tree species + 40cm gets 1 point; WT > the biological root length of the afforestation tree species + 40cm gets 0 point.

[0093] Determine the score of the shallow soil average water content D23: calculate the shallow (0-100cm) soil average water content SWC, SWC ≥ 4% for 1 point; 2% ≤ SWC < 4% for 0.5 points; SWC < 2% for 0 points.

[0094] Scores for determining surface mobility D24: 1 point for strong fixation (biological crust formation); 0.5 point for weak fixation (physical crust formation); 0.25 point for semi-fixation (partial crust formation that reduces mobility); and 0 point for flow (no crust formation).

[0095] Determine the score of D25 when more than 1 / 3 of the scrub-sand piles disintegrate: The disintegration of scrub-sand piles refers to the process in which the morphological structure of the scrub-sand piles is destroyed and the sand piles are no longer complete; the scrub-sand piles themselves can block and slow down the wind and sand through their vegetation and sand pile morphology. Once they disintegrate, this interception function will be greatly weakened, increasing the impact pressure on the protection system and affecting the overall stability; 1 point will be awarded if there is no such event; 0 points will be awarded if there is such event.

[0096] Determine the score of natural disaster D26: refers to the relatively serious rodent damage, pests and diseases, wind damage, etc. that are currently occurring. Among them, wind damage refers to the narrow channel effect formed by the upwind direction of the protection system, which increases the surface wind erosion, damages the sand barrier, exposes the plant root system, breaks the fine roots, and weakens the anchoring force. The phenomenon of the death of the whole Haloxylon ammodendron plant caused by the narrow channel effect in the groove area is very common. Natural disaster factors do not include accidental events that have not occurred or may occur in the future; if there is no accidental event, 1 point will be awarded; if there is an accidental event, 0 points will be awarded.

[0097] Determine the score of protection system enclosure measure D27: 1 point for enclosure and installation of video surveillance; 0.6 point for enclosure only; 0 point for no enclosure.

[0098] Determine the score of tending and maintenance D28: If the tending measures include irrigation, pruning, pest and disease control, etc., 1 point will be awarded; if not, 0 point will be awarded.

[0099] Scoring for determining whether the forest chief system D29 is implemented: If illegal grazing, excessive mining, illegal logging, excessive digging, and other factors that are not conducive to stability occur, and the person is able to promptly handle the situation on site, 1 point will be awarded; otherwise, 0 points will be awarded.

[0100] Determine the score of ecological construction policy publicity D30: Ecological construction publicity can enhance the public's ecological awareness and forest protection awareness, and reduce interference and damage to the protection system. Farmers will even spontaneously use crop straw to set up sand barriers outside the farmland to alleviate the invasion of quicksand into the farmland. 1 point will be given for frequent use; 0.5 point for occasional use; and 0 point for no use.

[0101] Determine the score for groundwater use control D31: 1 point if present; 0 point if not present.

[0102] S4. Determine the current stability score according to the scores of each current stability evaluation index and the corresponding weight of the current stability evaluation index. Figure 3 In the flowchart shown, step S4 specifically includes the following steps:

[0103] S41. Determine the protection system integrity score based on the scores of each protection system integrity evaluation indicator and the corresponding weight of the protection system integrity evaluation indicator.

[0104] S42. Determine the plantation forest score according to the scores of the plantation forest evaluation indicators and the corresponding weights of the plantation forest evaluation indicators.

[0105] S43. Determine the mechanical sand barrier score according to the score of each mechanical sand barrier evaluation indicator and the corresponding weight of the mechanical sand barrier evaluation indicator.

[0106] S44. Determine the score of the natural vegetation in the closed-off area according to the score of the natural vegetation evaluation index of each closed-off area and the corresponding weight of the natural vegetation evaluation index of the closed-off area.

[0107] S45. Determine the current stability score based on the protection system integrity score, artificial forest score, mechanical sand barrier score, closed-off area natural vegetation score and their respective weights.

[0108] In this embodiment, the current stability score is determined according to the following formula:

[0109]

[0110] Among them, S B1 is the current stability score, that is, the value of the current stability score index B1, k i is the weight of the i-th evaluation index, x i is the value of the i-th evaluation index. B1 ≥0.8, the current status of the sand-blocking and sand-fixing belt is stable; when 0.8>S B1 When S ≥0.5, the current status of the sand-blocking and sand-fixing belt is metastable; B1 When it is <0.5, the current status of the sand-blocking and sand-fixing belt is unstable.

[0111] S5. Determine the stability driving factor score according to the scores of each stability driving factor evaluation index and the weight of the corresponding stability driving factor evaluation index. Figure 4 In the flowchart shown, step S5 specifically includes the following steps:

[0112] S51. Determine the climate factor score according to the score of each climate factor evaluation index and the corresponding climate factor evaluation index weight.

[0113] S52. Determine the hydrological factor score according to the score of each hydrological factor evaluation indicator and the corresponding weight of the hydrological factor evaluation indicator.

[0114] S53. Determine the soil factor score according to the score of each soil factor evaluation index and the corresponding weight of the soil factor evaluation index.

[0115] S54. Determine the natural disaster factor score according to the score of each natural disaster factor evaluation indicator and the corresponding weight of the natural disaster factor evaluation indicator.

[0116] S55. Determine the management factor score according to the score of each management factor evaluation indicator and the weight of the corresponding management factor evaluation indicator.

[0117] S56. Determine the stability driving factor score according to the climate factor score, the hydrological factor score, the soil factor score, the natural disaster factor score, the management factor score and their respective weights. In this embodiment, the stability driving factor score is determined according to the following formula:

[0118]

[0119] Among them, S B2 is the stability driving factor score, that is, the value of the stability driving factor score indicator B2, k i is the weight of the i-th evaluation index, x i is the value of the i-th evaluation index. B2 ≥0.8, the sand-fixing belt is predicted to develop towards stability; when 0.8>S B2 When S ≥0.5, it is predicted that sand blocking and sand fixation will develop towards metastability; B2 When it is <0.5, the sand-fixing belt develops towards instability.

[0120] S6. Determine the stability development trend score based on the current stability score, stability driving factor score and their respective weights. Determine the stability development trend score based on the following formula:

[0121] S A =0.7*S B1 +0.3*S B2 .

[0122] Among them, S A Score the stability trend. A ≥0.8, the sand-blocking and sand-fixing belt is in a stable development state; when 0.8>S A ≥0.5, it is in a metastable development state; when S A When <0.5, it is in an unstable development state.

[0123] In an exemplary embodiment of the present application, after determining the stability development trend score, in order to facilitate intuitive display of the scores of each evaluation index item, the method further includes the following steps:

[0124] S7. Determine the stability development trend of the sand-fixing belt protection system based on the stability development trend score and the development trend score threshold, and display the scores of each current stability evaluation index and each stability driving factor evaluation index in a visual way.

[0125] Based on the same inventive concept, the embodiment of the present application also provides a system for implementing the above-mentioned method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system. The implementation scheme for solving the problem provided by the system is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in one or more system embodiments provided below can refer to the above-mentioned limitations on the method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system, and will not be repeated here.

[0126] In an exemplary embodiment, Figure 5 As shown, a sand-blocking and sand-fixing belt protection system stability development trend evaluation system is provided, including the following modules:

[0127] The evaluation index screening and determination module M1 is used to determine several current stability evaluation indicators and several stability driving factor evaluation indicators based on the field investigation of the sand-blocking and sand-fixing belt protection system and the evaluation of research data.

[0128] The evaluation index weight determination module M2 is used to determine the weight of each current stability evaluation index and the weight of each stability driving factor evaluation index by using the hierarchical analysis method.

[0129] The evaluation index score determination module M3 is used to determine the scores of various current stability evaluation indicators and the scores of various stability driving factor evaluation indicators based on the field investigation of the sand blocking and fixing belt protection system.

[0130] The current stability score determination module M4 is used to determine the current stability score according to the scores of each current stability evaluation indicator and the corresponding weights of the current stability evaluation indicators.

[0131] The stability driving factor score determination module M5 is used to determine the stability driving factor score according to the score of each stability driving factor evaluation indicator and the weight of the corresponding stability driving factor evaluation indicator.

[0132] The stability development trend score determination module M6 is used to determine the stability development trend score based on the current stability score, the stability driving factor score and their respective weights.

[0133] certainly, Figure 5 The architecture shown is only exemplary and can be omitted according to actual needs when implementing different functions. Figure 5 One or at least two components of the system shown.

[0134] The method and system for evaluating the stability development trend of the sand-blocking and sand-fixing belt protection system provided in the above-mentioned embodiments of the present application adopt a hierarchical analysis method to determine the weight of each evaluation indicator for the determined current stability evaluation indicators and stability driving factor evaluation indicators, aiming to comprehensively and accurately reflect the stability of the sand-blocking and sand-fixing belt protection system; subsequently, based on field investigations, the scores of each evaluation indicator are determined, and the current stability score is determined based on the scores and weights of each current stability evaluation indicator, while the stability driving factor score is determined based on the scores and weights of each stability driving factor evaluation indicator; finally, the stability development trend score is determined based on the current stability score, the stability driving factor score and their respective weights.

[0135] The evaluation index values ​​used in this plan are easy to obtain. Most of the indicators are obtained through field surveys and can be used directly or after simple calculations. The remaining indicators can be obtained through the official website or by retrieving information from industry departments. The evaluation system and hierarchy are clear, and the structure is clear, so technical personnel with professional backgrounds can master it. In addition, it can provide early warning data for the stability trend prediction of sand-blocking and sand-fixing belts, which can accurately reveal the stability development trend of the sand-blocking and sand-fixing belt protection system and the main problems and risks faced in development. It can provide researchers with targeted optimization strategies based on development trend scores, and provide a scientific basis for relevant management departments in sand prevention, resource allocation and policy adjustment.

[0136] In another exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 6 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the relevant steps of a method for evaluating the stability development trend of a sand-blocking and sand-fixing belt protection system provided in the previous embodiment can be implemented.

[0137] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0138] In an exemplary embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0139] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0140] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0141] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0142] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0143] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0144] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0145] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for evaluating the stability development trend of a sand-fixing belt protection system, characterized in that: include: Based on the field investigation of the sand-fixing belt protection system and the evaluation of research data, several current stability evaluation indicators and several stability driving factor evaluation indicators are determined; The analytic hierarchy process is used to determine the weights of each current stability evaluation index and the weights of each stability driving factor evaluation index; Based on the field investigation of the sand-blocking and sand-fixing belt protection system, the scores of each current stability evaluation index and each stability driving factor evaluation index are determined; Determine the current stability score according to the scores of each current stability evaluation indicator and the corresponding weights of the current stability evaluation indicators; Determine the stability driving factor score based on the score of each stability driving factor evaluation indicator and the corresponding weight of the stability driving factor evaluation indicator; A stability development trend score is determined based on the current stability score, the stability driving factor score and their respective weights.

2. The method for evaluating the stability development trend of the sand-fixing belt protection system according to claim 1 is characterized in that: The current stability evaluation indicators include: several protection system integrity evaluation indicators, several artificial forest evaluation indicators, several mechanical sand barrier evaluation indicators and several closed-off area natural vegetation evaluation indicators; the stability driving factor evaluation indicators include: several climate factor evaluation indicators, several hydrological factor evaluation indicators, several soil factor evaluation indicators, several natural disaster factor evaluation indicators and several management factor evaluation indicators.

3. The method for evaluating the stability development trend of the sand-fixing belt protection system according to claim 2 is characterized in that: The current stability score is determined based on the scores of each current stability evaluation indicator and the corresponding weight of the current stability evaluation indicator, including: Determine the protection system integrity score based on the scores of each protection system integrity evaluation indicator and the corresponding weight of the protection system integrity evaluation indicator; Determine the plantation forest score based on the scores of each plantation forest evaluation indicator and the corresponding plantation forest evaluation indicator weight; Determine the mechanical sand barrier score according to the scores of each mechanical sand barrier evaluation index and the corresponding weight of the mechanical sand barrier evaluation index; Determine the natural vegetation score of the closed-off area based on the scores of the natural vegetation evaluation indicators of each closed-off area and the corresponding weights of the natural vegetation evaluation indicators of the closed-off area; The current stability score is determined based on the protection system integrity score, the artificial forest score, the mechanical sand barrier score, the closed-off area natural vegetation score and their respective weights.

4. The method for evaluating the stability development trend of the sand-fixing belt protection system according to claim 2 is characterized in that: The stability driving factor score is determined based on the scores of each stability driving factor evaluation indicator and the corresponding weight of the stability driving factor evaluation indicator, including: Determine the climate factor score based on the score of each climate factor evaluation indicator and the corresponding climate factor evaluation indicator weight; Determine the hydrological factor score based on the score of each hydrological factor evaluation index and the corresponding weight of the hydrological factor evaluation index; Determine the soil factor score according to the score of each soil factor evaluation index and the corresponding weight of the soil factor evaluation index; Determine the natural disaster factor score based on the score of each natural disaster factor evaluation index and the corresponding natural disaster factor evaluation index weight; Determine the management factor score based on the score of each management factor evaluation indicator and the weight of the corresponding management factor evaluation indicator; A stability driving factor score is determined based on the climate factor score, the hydrological factor score, the soil factor score, the natural disaster factor score, the management factor score and their respective weights.

5. The method for evaluating the stability development trend of the sand-fixing belt protection system according to claim 2 is characterized in that: The evaluation indicators of the integrity of the protection system include: the width and lateral continuity of the sand-fixing belt; the evaluation indicators of the artificial forest include: tree species selection, tree species composition, existing density, afforestation mode, development stage, planting point configuration, deadtop rate, root exposure degree, natural regeneration ability of vegetation and species richness of natural vegetation in the forest; the evaluation indicators of the mechanical sand barrier include: damage rate; the evaluation indicators of natural vegetation in the closed-off area include: coverage, species richness, Simpson evenness index, number of layers and development stage of white thorn shrub sand pile; the evaluation indicators of climate factors include: average annual precipitation, annual dryness and annual sand wind speed; the evaluation indicators of hydrological factors include: groundwater level; the evaluation indicators of soil factors include: average moisture content of shallow soil, surface fluidity and disintegration of more than 1 / 3 of shrub sand piles; the evaluation indicators of natural disaster factors include: natural disasters; the evaluation indicators of management factors include: protection system closure measures, nurturing and protection, whether the forest chief system is implemented, ecological construction policy publicity and groundwater use control.

6. The method for evaluating the stability development trend of the sand-fixing belt protection system according to claim 1 is characterized in that: The method for evaluating the stability development trend of the sand-blocking and sand-fixing belt protection system also includes: According to the stability development trend score and the development trend score threshold, the stability development trend of the sand-fixing belt protection system is determined, and the scores of each current stability evaluation index and each stability driving factor evaluation index are displayed in a visual way.

7. A sand-blocking and sand-fixing belt protection system stability development trend evaluation system, characterized in that: Used to implement the method for evaluating the stability development trend of the sand-blocking and sand-fixing belt protection system as claimed in any one of claims 1 to 6, the sand-blocking and sand-fixing belt protection system stability development trend evaluation system comprises: The evaluation index screening and determination module is used to determine several current stability evaluation indicators and several stability driving factor evaluation indicators based on the field investigation of the sand-blocking and sand-fixing belt protection system and the evaluation of research data; The evaluation index weight determination module is used to determine the weight of each current stability evaluation index and the weight of each stability driving factor evaluation index by using the hierarchical analysis method; An evaluation index score determination module is used to determine the scores of various current stability evaluation indicators and the scores of various stability driving factor evaluation indicators based on the field investigation of the sand blocking and fixing belt protection system; A current stability score determination module, used to determine the current stability score according to the scores of each current stability evaluation indicator and the corresponding weights of the current stability evaluation indicators; A stability driving factor score determination module is used to determine the stability driving factor score according to the score of each stability driving factor evaluation indicator and the weight of the corresponding stability driving factor evaluation indicator; The stability development trend score determination module is used to determine the stability development trend score based on the current stability score, the stability driving factor score and their respective weights.

8. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for evaluating the stability development trend of the sand-fixing belt protection system as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for evaluating the stability development trend of the sand-blocking and sand-fixing belt protection system described in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for evaluating the stability development trend of the sand-blocking and sand-fixing belt protection system described in any one of claims 1 to 6 is implemented.

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