134 results about "Arid zone" patented technology

The invention discloses a high and cold arid region slope soil stability safety risk evaluation system and method, and relates to the technical field of slope engineering. The state of each side slope under multi-dimensional indexes such as freeze-thaw cycle frequency, dry-wet alternation index, wind erosion strength, shear strength, water content, porosity and fracture density is quantified, the feature similarity between any two side slopes is calculated, and then a side slope feature similarity matrix is formed. Based on the matrix, an unsupervised clustering algorithm (such as spectral clustering, similarity propagation and the like) can be adopted to divide a plurality of side slopes into similar subsets with structural characteristics similar to environmental response, and category attribution of risks is achieved. On the basis, structural variation analysis, historical instability statistics and central risk difference extraction are performed on similar slope samples, so that the internal instability tendency of the slope can be identified, and a risk prediction model suitable for the type of slope can be constructed through feature training.

The invention provides a method suitable for water retention of soil with different textures. In order to better perform size matching between the biochar and soil particles, particle size grading is performed on the biochar according to the size of soil aggregates, and three kinds of biochar with the particle size larger than 2.0 mm, the particle size ranging from 0.25 mm to 2.0 mm and the particle size smaller than 0.25 mm are obtained. The three kinds of biochar with different particle sizes are used in different types of soil respectively, and 5% of biochar with the particle size of 0.25-2.0 mm is selectively applied according to the water retention requirement of the arid area loam farmland; according to the drainage requirements of loam waterlogging areas with more rainfall, 5% of biochar with the particle size larger than 2.0 mm is selectively applied; and 5% of biochar with the particle size smaller than 0.25 mm is selectively applied for water and soil conservation of sandy soil in the arid region. By scientifically regulating and controlling the particle size and the application amount of the biochar, the biochar is matched with the specific properties of the soil, so that the water retention capacity of the soil is improved, and the soil efficiency is improved.

The invention discloses an arid region groundwater reserve estimation method and system based on multi-source remote sensing data, and relates to the technical field of groundwater monitoring, and the method comprises the steps: collecting land water reserve data and remote sensing image data of a target arid region, obtaining a land water reserve change sequence according to the land water reserve data, carrying out the region weighting of the target arid region, and obtaining a target arid region groundwater reserve change sequence; obtaining a land water reserve change sequence of the target arid region; based on the remote sensing image data of the target arid region, using a digital elevation model to obtain a surface water reserve change sequence of the target arid region, using a land surface process model to obtain a soil water reserve change sequence of the target arid region, and establishing an underground water reserve model of the target arid region; and performing error analysis on an output result of the groundwater reserve model by using a Monte Carlo simulation method. According to the method, through collaborative inversion of multi-source remote sensing data and integration of the groundwater reserve models, accurate quantification of spatial-temporal dynamic of the groundwater reserves in the arid region is realized.

The invention relates to the technical field of artificial intelligence, and discloses a gobi desert surface temperature prediction method based on deep learning. According to the method, a system architecture in which an acquisition end, a remote sensing end, an edge computing terminal and a central server cooperatively operate is constructed, and fusion and real-time transmission of multi-source observation data are realized. By designing a space-time neural network model fused with physical constraints, combining an angle-guided convolutional neural network and a gated cycle unit structure, and introducing surface energy balance and Stefan-Boltzmann radiation consistency constraints, high-precision prediction and physical consistency modeling of surface temperature are realized. And a cross-scale reconstruction and missing detection complementation mechanism is adopted, so that the spatial continuity and resolution of a prediction result are improved. According to the method, high-precision, stable and self-adaptive prediction of the surface temperature of the gobi desert area is realized, and intelligent support is provided for meteorological monitoring, ecological evaluation and early warning decision making of the arid area.

The invention discloses a risk dynamic analysis method for a vegetation phenological period in an arid region, and the method comprises the steps: constructing a spring phenological model and an autumn phenological model in different partitions according to the partitions of different growth season initial periods SOS and growth season final periods EOS of plants in the arid region; respectively calculating vegetation growth risk coefficients of different growth season initial stage SOS partitions and growth season final stage EOS partitions; carrying out weight fusion on the vegetation growth risk coefficients to obtain a long-period vegetation growth risk comprehensive coefficient F in the arid region; calculating an ecological groundwater drought risk coefficient; calculating a vegetation risk dynamic coefficient of the arid region; and evaluating the growth risk of the vegetation in the arid region in the phenological period. According to the method, the drought risk influence coefficient is comprehensively calculated by utilizing representative feature data corresponding to different subareas and phenological areas, and comprehensive analysis of vegetation risk assessment in the arid area is realized by combining the ecological underground water drought risk coefficient on the annual scale.

The invention belongs to the field of remote sensing technology application, mainly aims at three typical grassland ecological system types of desert, grassland and meadow in an arid region, and discloses a grassland ecological health four-dimensional quantitative evaluation method based on multi-source remote sensing data. Comprising the following steps: S1, data fusion and long-time-sequence base construction: aiming at three typical grassland ecosystems of desert, grassland and meadow in an arid region, integrating long-time-sequence multi-source remote sensing images and auxiliary environment observation data, and reconstructing a model through a space-time fusion algorithm and missing data; and constructing a long-time-sequence multi-dimensional raster data set which is consistent in spatial resolution and covers non-biological background conditions. According to the system, accurate evaluation of long-time-sequence comprehensive conditions of different typical grassland types in the arid region is realized, the input information dimension and quality of the evaluation model are remarkably improved, and the ecological health problem is innovatively and accurately diagnosed from the deficiency of system bases, functional vitality, structural tissues or stress resistance recovery capability on the spatio-temporal scale.

The invention discloses a method for manufacturing a simulated earthen ruins rammed earth test wall based on original diseases, and relates to the field of earthen ruins protection and restoration. The method comprises the following steps: step 1, determining earthen archaeological site diseases to be researched and preparing materials; 2, mold assembling and disease marking are carried out; 3, layered ramming is conducted; step 4, crack disease processing; step 5, performing undercutting disease processing; 6, weathering disease processing; step 7, processing rain erosion diseases; and step 8, northwest environment simulation. The earthen archaeological site rammed earth wall is manufactured by integrating multiple disease collaborative simulation technologies of fissure, undermining, weathering and rain erosion, meanwhile, adaptability design of a strong wind erosion area, a strong sunshine area and a strong salinization area is made for northwest arid areas, and the method has the core advantages of disease reproduction authenticity, standardized grading, environment adaptability and the like; a scientific and reasonable technical means is provided for earthen archaeological site protection engineering, and a reliable test piece is provided for research and development of a protection technology.

The invention relates to the technical field of environmental protection and monitoring, and discloses an arid region oasis water environment ecological safety early warning method, which comprises the following steps: step 1, constructing a sky-air-land-water three-dimensional monitoring network, the monitoring network comprises a satellite remote sensing monitoring subsystem, an unmanned aerial vehicle remote sensing monitoring subsystem, a ground sensor monitoring subsystem and an underwater monitoring subsystem, and the monitoring network is used for acquiring multi-scale and multi-element water environment ecological data; step 2, establishing an ecological safety evaluation index system of the oasis water environment in the arid region, the evaluation system including four first-level indexes of hydrology and water resource dimension, water environment quality dimension, ecological health dimension and social economy dimension, and setting a plurality of quantifiable second-level indexes under each first-level index. A combined prediction model in which a Markov chain and a long-short-term memory neural network are coupled is adopted, and a system dynamics scene simulation method is combined, so that the perspectiveness and scene adaptability of the early warning method are effectively enhanced.

The invention relates to the field of ecological hydrology, and discloses an arid and semi-arid region plant ecological water consumption calculation method, which comprises the following steps: acquiring meteorological, soil and vegetation phenological data; constructing a root system depth dynamic evolution model, and updating the maximum depth of the root system day by day; determining the depth weight of the effective moisture extraction layer based on the dynamic root system distribution; calculating the weighted average effective soil water content; and outputting daily-scale ecological water consumption in combination with the corrected transpiration scale model. By coupling meteorological driving, soil moisture stress and a dynamic regulation and control mechanism of a plant growth stage on a root system, the water consumption inversion precision is remarkably improved, the root-mean-square error is reduced by more than 25% through actual measurement verification, and a high-precision quantification tool is provided for ecological water demand evaluation and water resource management.

The utility model provides an arid area saline-alkali land treatment structure, which is characterized in that saline-alkali land is divided into a plurality of planting areas and a saline-alkali water collection and treatment area, each planting area comprises a planting layer, a water drainage and salt guide layer, a permeation-resistant air layer and an original layer, and the water drainage and salt guide layers are respectively positioned at the upper part of the permeation-resistant air layer and inside the original layer; the drainage salt guide layer, the permeation-resistant gas layer and the original layer are all in an inverted V shape with the high middle and the low two sides, and the hydraulic gradient of the slopes on the two sides is 1%-2%. The saline-alkali water collecting and treating area is composed of an alkali discharge channel, a filtering and collecting tank, an electro-adsorption tank, a water storage tank and an evaporation tank, the alkali discharge channel comprises an alkali discharge channel slope, an alkali discharge channel bottom surface and a water level sensor, and the hydraulic gradient of the alkali discharge channel bottom surface is 3%-5%. A filtering and collecting tank, an electro-adsorption tank, a water storage tank and an evaporation tank are arranged at the lowest-gradient end of the bottom surface of the alkali discharge channel. According to the utility model, a planting area layered improved structure is combined with a saline-alkaline water collection, treatment and storage integrated structure, so that the salt content of soil is reduced, and the recycling of saline-alkaline water is realized.

The invention relates to the technical field of soil improvement and ecological restoration, and discloses an ultra-stable mineralization in-situ salt fixation method for improvement of saline-alkali soil in an arid region and application of the ultra-stable mineralization in-situ salt fixation method. The invention provides a method for improving northwest inland saline-alkali soil based on combination of an ultra-stable mineralized in-situ salt-fixing soil conditioner, precise partitioning, biological improvement and salt-tolerant plant planting. According to the method, a salt elimination foundation is created through physical soil preparation, firstly, the soil alkalization degree and the salt content are rapidly reduced through an ultra-stable mineralization in-situ salt fixation soil conditioner, the physical structure of the soil is improved, and then rapid salt elimination and alkali inhibition, fertility cultivation and ecological reconstruction of the saline-alkali soil are finally achieved by constructing different plant planting modes and establishing a stable vegetation system. And a sustainable saline-alkali soil comprehensive treatment mode with good effect and low cost is formed.

The invention discloses an arid region soil wind erosion prevention and control vegetation optimal configuration system, and relates to the technical field of arid region ecological restoration and soil wind erosion prevention and control. The system comprises the following components: a plant organ wind erosion rate determination module, a vegetation wear resistance database module, a wind erosion strength partitioning module, a vegetation gradient configuration execution module and a dynamic monitoring and feedback module. According to the invention, through the wind erosion and abrasion intensity partitioning module, the wind speed, the sand grain density, the terrain, the altitude and the seasonal dynamic change factors are comprehensively considered, an improved wind erosion intensity index algorithm is adopted, the region is accurately divided into strong, medium and weak abrasion regions, and the accurate partitioning provides a scientific basis for the subsequent vegetation configuration, so that the vegetation configuration can adapt to local conditions, and the vegetation configuration efficiency is improved. The vegetation gradient configuration execution module configures plants with corresponding wear-resistant grades according to regions with different abrasion strengths, and meanwhile, the vegetation gradient configuration execution module reasonably configures single-species or multi-species mixed vegetation based on a wear-resistant matching degree algorithm and a species complementarity algorithm.

The application discloses a kind of arid region reservoir water and sand prediction and coordinated regulation potential evaluation method and system, belong to water resources, silt treatment and reservoir optimization scheduling technical field.The technical problems of traditional model prediction accuracy insufficient caused by arid region hydrology data scarcity, water and sand prediction process is fragmented and reservoir desilting and silt reduction and water storage benefit difficult to be synergistically optimized, its gist is that: long short-term memory network is used to predict future runoff sequence by fusing attention mechanism, and the sediment concentration is calculated by combining the water and sand relationship formula;By setting the critical sediment concentration threshold, the high sediment concentration period is identified and the available water for dredging is calculated;At the same time, the flood resource potential is evaluated by combining reservoir capacity and water demand constraints;Finally, the coordinated scheduling scheme is generated by comparing the two potentials.The application realizes the integrated accurate prediction of water and sand process in arid region and the simultaneous quantitative evaluation of regulation potential, and provides intelligent decision support for multi-objective optimization scheduling of reservoir.

The invention discloses a multi-scale water resource optimal configuration and efficiency evaluation analysis method for an arid region, and relates to the technical field of water resource management and sustainable utilization. The method comprises the steps of collecting and processing comprehensive water resource management data of an arid region to form an arid region water-ecology-society comprehensive data set, and performing scale identification processing on the arid region water-ecology-society comprehensive data set to form a basic scale data set; and performing scale hierarchy decomposition on the basic scale data set to form upper-layer scale data and lower-layer scale data. According to the invention, by collecting and processing comprehensive water resource management data, performing scale identification and decomposing the data into the upper-layer scale data set and the lower-layer scale data set, water resource optimal configuration and efficiency evaluation in the arid region are realized, a system is helped to identify and process spatial distribution and demand change, and more accurate and effective resource management is realized.

The invention discloses an exposed high and steep slope microtopography reconstruction method for improving vegetation colonization ability, which comprises the following steps: screening rocks with high weathering sensitivity, and establishing a weathering rate quantitative evaluation model; the weathering process of the rock with high weathering sensitivity is accelerated; constructing a micro-topographic space; based on the micro-topographic space, designing a three-stage compound matrix through the nutritional defects of the weathered product of the high-weathering-sensitivity rock, and carrying out layered fusion on the three-stage compound matrix and the micro-topographic structure; and carrying out vegetation planting and weathering-growth synergistic maintenance. According to the method, permeation of a weathering agent is guided through preset cracks, rock is converted into a nutrient matrix through an enhanced weathering technology, and the problem that traditional physical transformation depends on an external matrix and is prone to being deficient in the later period is solved; according to the method, the climate areas are graded, different treatment is conducted on the different climate areas according to the grading result, the water retention rate of the arid area is increased, the drainage efficiency of the wet area is improved, the overall structure is still stable when the gradient is larger than 60 degrees, and the gradient limitation of vegetation bags is broken through.

The invention discloses a WSRS framework-based ecological safety assessment method for a drainage basin in an arid region, relates to the technical field of ecological assessment, and solves the technical problems that the prior art is not adaptive to a coupling process of water, salt, evapotranspiration and underground water and lacks key factors, and an assessment method lacks weight uncertainty description and robustness analysis. The method comprises the steps of S1, acquiring multi-source data of a target drainage basin, and performing data preprocessing; s2, constructing a WSRS evaluation index system, and carrying out standardization processing on indexes; s3, based on the standardized indexes, determining the comprehensive weight of each index by adopting a subjective and objective combination weighting method; s4, performing comprehensive evaluation based on the comprehensive weight, and quantifying uncertainty of an evaluation result by adopting a cloud model to obtain an ecological safety index; s5, constructing a composite stress model and correcting an ecological safety index; and S6, carrying out risk grade division and result visualization. The method has the advantages that the arid region process adaptability is high, the evaluation result is stable and explainable, and the like.

The invention discloses a multi-condition constrained multi-modal remote sensing intelligent identification method for an arid region reservoir dam, and the method comprises the steps: firstly, making a VIS-NIR multi-modal reservoir dam image data set for algorithm training and feature learning for a serious problem of target spectrum homogenization of VIS data in an arid region; secondly, designing a DDE-YOLO algorithm, adopting an MF early fusion strategy to perform weighted fusion on input of two modes of VIS and NIR in a symmetric mode, and performing feature learning optimization by using MSC3k multi-scale C3k convolution and TCUB transposed convolution up-sampling; and then providing a multi-condition constraint strategy to screen potential candidate areas of the dam, realizing accurate positioning of a target by using an NMS algorithm, and extracting coordinate information of a center point of the detected target to generate a vector map. The method can effectively solve the problems that under the complex arid region background, under VIS single-mode input, the homogenization of a reservoir dam target and the background is serious, the dam space positioning error is large, the detection precision is low, the false alarm rate is high, and the remote sensing intelligent extraction and automatic drawing level is low.

The invention provides a method and system for determining a saline soil foundation melt sinking coefficient based on a soaking load test. The method comprises the steps that the soaking load test is conducted on a target site, the total settlement amount is measured, and the additional stress influence depth and the soaking depth are determined; layering a soil layer in the target site, and determining a compression modulus and a layering thickness; based on the compression modulus and the layering thickness, determining the additional stress deformation of the substrate and the water immersion humidification deformation of the soil body; removing the base additional stress deformation amount and the soil body soaking and humidifying deformation amount from the total settlement amount to obtain the melt sinking deformation amount; and determining the solution subsidence coefficient of the salinized soil foundation based on the solution subsidence deformation and the immersion depth. According to the method, the melt sinking deformation and other deformation components are precisely separated, so that the determined melt sinking coefficient is more suitable for engineering practice, a saline soil foundation treatment scheme can be effectively optimized, the engineering cost is reduced, meanwhile, the test period is remarkably shortened, the test cost input is reduced, and the method is suitable for foundation engineering investigation and design of saline soil distribution areas such as northwest arid regions.

This invention discloses a method for improving saline-alkali land in semi-arid regions to enhance plant diversity, comprising the following steps: S1, construction of treatment units; S2, arrangement of treatment units; S3, preliminary soil treatment; S4, planting of plants; and S5, intensive soil treatment. This invention addresses the problems of high salinity and species scarcity in saline-alkali land in semi-arid regions, providing a complete treatment method. By deploying multiple treatment units to form a treatment system, combined with the soil conditioner specifically designed for this invention, the high salinity of saline-alkali soil in semi-arid regions can be alleviated. Simultaneously, by incorporating a phytoremediation system primarily composed of alkali plantations, the biodiversity of exposed saline-alkali land in semi-arid regions can be effectively enhanced. Furthermore, considering seasonal factors and other factors such as rainfall, a one-year treatment plan is ultimately developed. After treatment, the land can be selectively developed into ornamental wetlands or agricultural land, possessing significant economic value.

The application relates to an agrobacterium ASE44 and application thereof. The agrobacterium ASE44 is separated from a desert grassland soil, is preserved in the China Center for Type Culture Collection, and has a preservation number of CCTCC No: M 20251157. The bacteria have a good promoting effect on improving the growth of oat grass seedling stages, can be prepared into a microbial inoculant for the application of the oat grass seedling stages, are applied to the actual production of the oat grass in a dry region, and provide an excellent basic strain for the excavation and application of desert microbial resources.

The utility model discloses a drip irrigation device for recovering soil and vegetation in an arid region. The drip irrigation device comprises a header pipe, a plurality of branch pipes are distributed on the main pipe; one ends of the branch pipes away from the header pipe are connected with drip irrigation heads; the drip irrigation head comprises a spray head, the spray head is connected to the branch pipe, and a plurality of water outlet holes I are formed in the spray head; the spray head is sleeved with a shell, and a plurality of second water outlet holes are formed in the shell; and a sponge layer is arranged between the nozzle and the shell. Water is distributed into the branch pipes through the main pipe, the drip irrigation heads are connected to the ends, away from the main pipe, of the branch pipes, and the water can further flow into the spray heads of the drip irrigation heads. And a plurality of water outlet holes I and a plurality of water outlet holes II which are uniformly distributed on the spray head and the shell are used for preliminarily dispersing water. And a sponge layer is arranged between the spray head and the shell, so that external impurities can be effectively blocked, the impurities are prevented from entering the branch pipes from the water outlet holes I and the water outlet holes II, and blockage is avoided. And the water is uniformly and slowly dripped into the soil of the arid region, so that the recovery of the soil and vegetation is facilitated.

The invention belongs to the technical field of ecological environment restoration, and particularly relates to an arid region gobi gravel curtain layer reconstruction method. Gobi in the arid region is subjected to earth surface leveling, gravel layer paving and saline pressing in sequence, and a gravel curtain layer is obtained. The gravel curtain layer earth surface reconstructed through the method has no obvious landscape difference with the surrounding natural gravel curtain layer earth surface, salt crust and gravel are tightly bonded together to form a hard soil protection layer, the earth surface can be effectively solidified, and soil wind erosion can be resisted.

The application discloses a shock-absorbing type culvert with animal migration and water discharge composite functions, and belongs to the technical field of animal passageways, which comprises a square culvert, shock-absorbing structures are arranged on the left side, the right side and the upper side outside of the culvert, the shock-absorbing structures relieve the vibration caused by vehicle driving, reduce the noise size in the culvert and prevent animals from being frightened. A composite light-emitting coating structure is arranged on the inside of the upper side of the culvert, the composite light-emitting coating structure weakens the light difference in the daytime and plays the night light performance at night, thereby providing guidance for animal migration. Drainage structures are arranged on the lower sides of the culvert, the drainage structures prevent the culvert from being washed away, animal passageways are arranged at the middle positions, outer extension plates are further arranged at the entrances and exits of the culvert, organic soil layers and water storage layers are arranged in the animal passageways, the outer extension plates and the organic soil layers and the water storage layers form a boat-shaped structure, water bodies are stored in the boat-shaped structure, the boat-shaped structure is beneficial to relieving the shortage of water resources in arid and semi-arid areas, the culvert is filled by plant growth, the culvert is closer to nature, the wariness of migratory animals to the culvert is reduced, and the ecological improvement effect is achieved.

The invention discloses a mountain species protection system based on a microclimate and ecological niche model in the technical field of biodiversity protection, which comprises a microclimate sensor network module, a data preprocessing module, an ecological niche prediction module, a protection priority evaluation module and a decision output platform module, the microclimate sensor network module comprises a multi-type sensor unit, a gradient layout unit and a dual-mode transmission unit, the mountain species protection system based on the microclimate and ecological niche model is reasonable in structural design, the data precision is improved, the deviation problem of a traditional constant LRT hypothesis is solved through dynamic LRT monitoring, the protection pertinence is enhanced, and the reliability of the mountain species protection system is improved. A first-level protection area of a high-risk mountainous area is accurately identified, dynamic adaptability and a sensor network support real-time data updating, sudden climate changes can be dealt with, the practical value is remarkable, and the method can be applied to research concerned arid areas and high-humidity low-direct-reduction-rate areas.

The utility model discloses an arid area vegetation non-irrigation planting hole which comprises a planting foundation pit, the planting foundation pit is arranged underground, a diversion weir is arranged on the periphery of the planting foundation pit, a soil moisture conservation and restoration layer is laid at the bottom of the planting foundation pit, and a starch gelatinization layer is laid on the soil moisture conservation and restoration layer. The utility model relates to the technical field of non-irrigation planting holes, in particular to a non-irrigation planting hole for vegetation in an arid region, which combines planting hole digging, soil moisture preservation technology and irrigation mode, so that irrigation is not needed in the later period, the survival rate, the preservation rate and the growth amount of nursery stocks can be improved, and the afforestation cost is reduced. By narrowing the top opening of the planting hole, the irradiation time of water in the planting foundation pit is shortened, the evaporation capacity of accumulated water is reduced, the temperature of reserved water is reduced, and the growth environment of plants is protected.

The invention provides a method and a system for evaluating ecological environment damage of mine coal mining in an arid region, and relates to the technical field of ecological environment damage evaluation.The method comprises the following steps: uniformly dividing a mining region into a plurality of sub-regions, and collecting multi-dimensional characteristic parameters of the sub-regions to construct an ecological data set; constructing a spatial association graph based on the ecological data set, establishing edge connection between the sub-regions through Euclidean distance, and segmenting the spatial association graph into a plurality of ecological influence communities with similar ecological response characteristics by using a Louvain community discovery algorithm; extracting ecological environment evaluation characteristic parameters based on the mining activity characteristic data, the geological and hydrological basic data and the ecological system response data, constructing a damage evaluation model, and determining damage evaluation indexes of each community; and comparing the damage assessment index with a preset threshold value, dividing damage grades for the ecological community, combining the damage grades with space coordinates to generate a visual report, and proposing ecological restoration suggestions, thereby realizing ecological environment damage assessment of the mining area.

The utility model discloses a fast assembly arid area water-saving irrigation device which comprises two supporting frames which are symmetrically arranged in parallel, walking wheels are rotatably installed at the bottoms of the two supporting frames respectively, installation bases are fixedly installed at the tops of the opposite sides of the supporting frames respectively, the installation bases are hinged to the two ends of a telescopic piece respectively, and the telescopic piece is connected with the walking wheels. The bottom end of the telescopic part is provided with a plurality of threaded connectors through threaded structures, the bottom ends of the threaded connectors are fixedly connected with a transmission part, one side of the bottom end of the transmission part is fixedly connected with a pipeline connector, and the other side of the bottom end of the transmission part is provided with a nozzle through a threaded structure. Through the arrangement of the telescopic piece, the irrigation requirements of different areas can be met, and the irrigation range is enlarged; the flowing force of the water flow is matched with the transmission part to drive the nozzles to swing back and forth, the nozzles swinging back and forth increase the irrigation range of a single nozzle, and the irrigation area is increased.

The application discloses a natural solution-based ecological restoration method for salinized land in a semi-arid area, which comprises the following steps: S1, demarcating a plurality of ecological restoration areas; S2, planting plants; in each ecological restoration area, high-level plants are planted in a circle at the edge of the ecological restoration area, and medium-level plants and low-level plants are sequentially planted in circles towards the inside of the ecological restoration area; and S3, setting the ecological restoration area; the application can form an ecological restoration area with multi-level plant distribution, which is helpful to restore and improve biodiversity; through the setting of the first groove, the sand barrier and the spacing therebetween, the seeds of plants at various levels can be deposited in the first groove or nearby along with the wind in subsequent years to achieve the purpose of sowing and growth, multi-level plants along the first groove are formed, the ecological restoration effect is strengthened, subsequent sowing by using wind power is facilitated, and manual dense planting is not needed.

The invention discloses a self-adaptive flood-drought mutual aid system and method for a river channel in an arid region based on terrain remodeling, and belongs to the technical field of ecological water conservancy projects. The system comprises a water and sediment separation topographic unit, a threshold value overflow topographic unit, a narrow and deep evaporation restraining topographic unit and an outer side beach overflowing flood area which are sequentially arranged in the water flow direction and coupled. A bottom plate of the water-sediment separation shape unit is provided with a transverse slope inclining towards an outer side concave bank, and bottom layer sediment is guided by gravity to be conveyed to the outer side; the narrow-deep evaporation-inhibiting terrain unit adopts a narrow-deep compound section with a large depth-to-width ratio to collect clear water so as to inhibit evaporation; and the top of the threshold overflow terrain unit forms a physical threshold for flood and drought switching. The invention further discloses a corresponding implementation method. According to the system, by remodeling the geometric shape of a riverbed, self-adaptive switching between clear water returning, efficient sand discharging and evaporation restraining in the dry season and muddy water beach overflowing, ecological supply and automatic dredging in the flood season is achieved, and the problems of water-sand contradiction and ecological water use of wandering rivers in the arid region are effectively solved.