106 results about "Semi aride" patented technology

The invention discloses a GIS-based arid and semi-arid region farmland irrigation priority dynamic evaluation and zoning method, system, device and medium, and belongs to the technical field of farmland irrigation priority evaluation and zoning, and the method comprises the steps: collecting various types of remote sensing satellite data of a to-be-irrigated region; performing pretreatment; identifying the boundary and range of the to-be-irrigated area, and extracting a remote sensing image of the to-be-irrigated area; based on the remote sensing image of the to-be-irrigated area and the basic geographic information, parameter calculation is carried out, and normalization processing is carried out; performing superposition calculation on each normalized parameter according to a set weight to obtain an irrigation priority index; partitioning the to-be-irrigated area based on the irrigation priority index to generate an irrigation priority map; and judging whether agricultural irrigation management requirements are met or not according to preset conditions. According to the method, temperature vegetation drought indexes, normalized moisture indexes, water resource accessibility and crop economic value parameters are coupled; the irrigation priority index weight can be automatically adjusted according to a season strategy.

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 invention belongs to the technical field of hydrological models and flood forecasting, and discloses a time-varying outflow coefficient-based flood runoff production simulation method, which comprises the following steps of interflow existence judgment, hydrological communication mechanism modeling, time-varying outflow coefficient model construction and parameter calibration and verification. According to the method, the behavior of the interflow is accurately described, the inflection point of the flood recession section can be accurately simulated, the flood forecasting precision of the semi-arid and semi-humid region is remarkably improved, and reliable technical support is provided for flood control and disaster reduction.

The invention discloses a method for repairing alkaline cadmium-polluted farmland in arid and semi-arid regions and application of the method, and belongs to the technical field of soil repairing. According to the method, the alkaline cadmium polluted farmland soil in the arid and semi-arid areas is subjected to deep ploughing treatment, and organic materials are applied to improve the soil fertility and the environment and health quality. On the basis, an intercropping planting system suitable for the arid and semi-arid land area is constructed, low-cadmium-accumulation grain crops and high-cadmium-accumulation plants are reasonably selected according to the ecological conditions and crop characteristics of the area, and an intercropping combination of low-absorption grain crops and enriched economic crop plants is formed. According to the system, organic unification of source reduction of heavy metal pollution in soil, pollution control in the planting process and continuous and safe utilization of the farmland is achieved, the dual goals of pollution remediation and farmland production are taken into account, and pollution reduction and collaborative improvement of economic benefits are achieved; and a feasible technical path is provided for ecological restoration of alkaline heavy metal polluted farmlands in arid and semi-arid regions.

Design, manufacture, and production of an engineering product that has the potential to assist and change agriculture in semi-arid and arid areas. Designing and manufacturing an engineering product in the form of absorboost tiles, these absorboost tiles assist in the replacement of the functions of soil, for easy interchangeability these absorboost tile dimensions are according to the effect root zone of the plant type, and the anther aim of absorboost tiles have durability, so that can use for agriculture with multiple times with storage capability.

This invention discloses an anti-clogging patch-type irrigation device and drip irrigation tape, comprising an inlet section, a main body, and an outlet section. The inlet section contains an inlet chamber and a filter structure; the main body contains several parallel anti-clogging channels, within which multiple diverters are spaced along the length of each channel. These diverters divide the water flow into at least two branches, causing impact when the branches converge; the outlet section has an outlet chamber communicating with the anti-clogging channels, and the outlet chamber has an outlet and a sand discharge hole. This invention uses diverters to cause water flow splitting and impact, transforming impurities from sidewall deposition to central convergence and flushing. Combined with the dual-outlet structure of the outlet and sand discharge hole, it achieves excellent anti-clogging performance and self-cleaning function, making it suitable for integrated water and fertilizer irrigation in arid and semi-arid regions.

The invention provides an early sowing and rainwater collecting planting method for arid and semi-arid areas, and belongs to the technical field of crop cultivation. The invention provides a millet planting method in arid and semi-arid regions, which comprises the following steps: when a soil layer is unfrozen by at least 20cm in spring, performing full film mulching and sowing on seeds and seed fertilizers subjected to seed dressing treatment; and supplementing a foliar fertilizer in the key growth period of the millet. According to the method, through seed dressing and full-film sowing of seed fertilizer, in combination with supplement of foliar fertilizer, early sowing and early maturing of millet can be completed only through rainfall, the utilization rate of fertilizer, pesticide and water is remarkably increased, the yield is increased, and the cost is saved.

The invention discloses an arid and semi-arid region slope rainwater collecting and infiltrating irrigation delaying greening device which comprises a rainwater collecting and infiltrating irrigation box fixed to a slope, and the rainwater collecting and infiltrating irrigation box is used for collecting rainwater and conveying the collected rainwater to plant root system positions through a seepage structure; the side face and the bottom plate of the rainwater collecting infiltrating irrigation box are of a closed structure, a plurality of seepage holes are formed in the side face close to the bottom, seepage cotton ropes sleeved with silicone tubes are connected to the seepage holes, and the seepage cotton ropes extend to the position needing irrigation. The rainwater collection infiltrating irrigation box is filled with a water storage material, and the water storage material is used for storing collected water; a PP plastic box cover, a one-way permeation phase conversion film and polyester sandwich screen cloth are respectively arranged at the top of the rainwater collection infiltrating irrigation box from bottom to top; when it rains, rainwater passes through the three-layer structure and enters the rainwater collection infiltrating irrigation box. The problems that the rainfall capacity of arid and semi-arid areas is small, space-time distribution is uneven, and existing slopes cannot be effectively greened are solved; and the cost for maintaining slope greening through sprinkling irrigation and drip irrigation is too high.

The invention discloses a pseudomonas NJAU-XP11 with phosphate solubilizing ability, low temperature resistance and drought resistance and application of the pseudomonas NJAU-XP11. The invention relates to pseudomonas sp. NJAU-XP11, which is classified and named as Pseudomonas sp. Pseudomonas sp., is preserved in China General Microbiological Culture Collection Center (CGMCC), the preservation date is August 18, 2025, and the preservation number is CGMCC No.35651. The pseudomonas sp. NJAU-XP11 is named as Pseudomonas sp. Pseudomonas sp. NJAU-XP11 and is preserved in China General Microbiological Culture Collection Center (CGMCC). The invention discloses the capability of dissolving phosphorus in soil and promoting soybean growth. The invention further discloses a microbial inoculum prepared from the bacillus subtilis and application of the microbial inoculum in soil phosphate solubilization and soybean growth promotion. The strain provided by the invention has relatively wide temperature and drought adaptive capacity, can play the functions of dissolving phosphorus in soil and promoting soybean growth in relatively low-temperature and relatively drought soil, is suitable for planting crops such as soybeans in semi-arid windy desert areas in northeast China, and has good popularization and application values.

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 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 application discloses a kind of fusion multi-source multi-temporal remote sensing's semi-arid shallow covering area stratum lithology classification method, collects multi-period multi-spectral remote sensing image and polarization SAR data and pre-processes, calculates optical and radar vegetation index, normalizes and constructs feature dataset;Combined with field investigation label sample, construct pixel-level sample set, after inputting multi-scale time series attention network training, output GeoTIFF format classification result graph. Overall realization is based on the stratum lithology classification of semi-arid shallow covering area of multi-source multi-temporal remote sensing data, breaks through the application limit of existing remote sensing lithology classification method in semi-arid shallow covering area, gets rid of the dependence of many existing deep learning classification algorithms on regional level image sample, overcomes the training data acquisition bottleneck caused by stratum lithology unit boundary blur in semi-arid shallow covering area, improves the reliability of lithology classification under complex environmental conditions in semi-arid shallow covering area.

The invention relates to the technical field of forest tree breeding and cultivation, in particular to an integrated method for improved variety breeding, rapid propagation and container seedling cultivation of poplar pie suitable for semi-arid regions. The integration method comprises the following steps: hybridizing populus arabinosa or populus sinkiang as a female parent and populus tomentosa or populus arabinosa as a male parent, screening by using a molecular marker to obtain F1-generation plants with salt-tolerant and drought-resistant characteristics, and sequentially carrying out rapid propagation, container seedling cultivation and afforestation planting on the F1-generation plants. Compared with the prior art, the method can solve the problem of rooting of the poplar pie, the afforestation survival rate is remarkably increased, and the method has the advantages of shortening the breeding period and accurately improving the stress resistance.

The invention provides a portable soil source water drawing device using a day and night natural condensation method in a semi-arid region and a using method, the portable soil source water drawing device comprises a mass exchange cylinder, a high light transmission ball cap is arranged at the top of the mass exchange cylinder, the lower part of the mass exchange cylinder is embedded in a soil body, a high heat conduction probe is arranged on the outer surface of the high light transmission ball cap, and the high heat conduction probe is embedded in the soil body. Through holes are evenly formed in the mass exchange barrel, a coil pipe is wound on the outer wall of the mass exchange barrel, a hot air inlet valve is arranged at the inlet end of the coil pipe, the outlet end of the coil pipe is connected with an air exhaust pipe, the air exhaust pipe is arranged in the center of the mass exchange barrel and extends out of a high-light-transmittance ball cap, and an exhaust port one-way valve is installed at the top end of the air exhaust pipe. A water condensation and catchment groove is formed in the lower portion in the high-light-transmission ball cap and connected with a water collection device. The device is mainly applied to drawing water from soil in arid and semi-arid environments, the principle that the moisture absorption capacity of air is increased along with temperature rise is utilized, the soil is heated in the daytime, the moisture absorption capacity and moisture content of the air in the regional soil are increased, and the air is used for cooling fast and condensing water drawing at night.

The invention discloses a bacillus strain NJAU-N3 and an application of the bacillus strain NJAU-N3. The invention relates to bacillus subtilis NJAU-N3, which is classified and named as bacillus cereus, and is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation date is August 18, 2025, and the preservation number is CGMCC No.35652. The bacillus subtilis NJAU-N3 is named as bacillus cereus, and is preserved in the China General Microbiological Culture Collection Center (CGMCC). The invention discloses the capability of the compound in soil nitrogen fixation and soybean growth promotion. The invention further discloses a microbial inoculum prepared from the bacillus subtilis and application of the microbial inoculum in soil nitrogen fixation and soybean growth promotion. The strain provided by the invention has wide temperature and drought adaptability, can play the functions of soil nitrogen fixation and soybean growth promotion in low-temperature and drought soil, is suitable for planting of crops such as soybeans in northeast semi-arid windy desert areas, and has good popularization and application values.

The invention belongs to the technical field of vegetation recovery, and particularly relates to a three-dimensional self-maintaining vegetation recovery technology and related application. The technology has obvious advantages in the aspects of improving the water utilization efficiency, improving the soil corrosion resistance, promoting the soil nutrient and water circulation, improving the biodiversity and the like, particularly, maintenance such as watering is not needed after vegetation restoration, the traditional method of fixing green with water is broken through, and serious dependence of vegetation restoration in arid and semi-arid regions on water resources is eliminated. The technology is tested in coal mines, ash storage fields, rare earth mines and the like in northern arid and semi-arid grassland areas, and a good effect is achieved.

This application discloses a method, apparatus, equipment, and medium for reservoir water level regulation in arid and semi-arid regions. The method includes: constructing a flood hydrograph corresponding to the target flood season based on hydrological sequence data calculated from hydrological, meteorological, and snowmelt sequence data; determining the target regulation duration based on the flood hydrograph with a reference peak flow; determining the water level reduction based on the reference peak flow and the target regulation duration; determining the water level rise based on the required water replenishment and the duration of the target flood season; determining the flood control water level range based on the water level reduction and rise; and adjusting the water level of the target reservoir based on the current forecast precipitation and the flood control water level range. This application utilizes a regulation strategy that dynamically calculates the reservoir's flood control range based on current hydrological, meteorological, and snowmelt factors, and dynamically adjusts the reservoir water level in conjunction with forecast precipitation. Compared to regulation schemes based on fixed flood control water levels, this improves the reservoir water level regulation effectiveness.

The application discloses a non-woven fabric light substrate deep-root seedling raising method, which comprises the following steps: step 1, wrapping plant seedlings and a second substrate layer in an inner covering film to form an insertion core; the inner covering film is wood pulp non-woven fabric or cotton pulp non-woven fabric; step 2, using a perforating tool to form an insertion hole in the middle of a first substrate layer of a non-woven fabric seedling raising container, and inserting the insertion core prepared in step 1 into the insertion hole, so that the non-woven fabric seedling raising container and the insertion core form a seedling raising unit; the non-woven fabric seedling raising container comprises an outer covering film and a first substrate layer located in the inner part of the outer covering film, and the outer covering film is non-woven fabric treated by an organic silicon hydrophobic agent; step 3, transporting the prepared seedling raising unit to a cultivation tray in a nursery; and performing water and fertilizer management on the plant seedlings according to set water and fertilizer conditions. The non-woven fabric light substrate deep-root seedling raising method can avoid the problems of root spiral and burrowing, promote vertical deepening of taproots, and improve the afforestation survival rate in arid, semi-arid and desert areas.

The invention discloses a soil fertility monitoring and regulating method for rose cultivation, is suitable for arid and semi-arid regions, and belongs to the technical field of rose cultivation. S2, applying a base fertilizer; s3, rose planting; s4, water management; s5, performing subsequent management; s6, fertility monitoring, regulation and control; according to the method, the water and fertilizer retention capacity of the soil is improved, the water retention capacity of the improved soil is improved through coal gangue roasting pretreatment, humic acid and vermiculite compounding and layered base fertilizer application, the problem that the water and fertilizer retention capacity of the soil in arid and semi-arid areas is poor is effectively solved, waste such as the coal gangue and municipal sludge is effectively utilized, and resource recycling is achieved; the Mongolian roses serve as excellent reclamation vegetation, the regional ecological environment can be improved, meanwhile, economic benefits are generated, and technical support is provided for land reclamation and industrial development in arid and semi-arid regions.

The invention provides a yield-increasing synergist for dry farming potatoes. The main components of the yield-increasing synergist are abscisic acid, a nitrification inhibitor, organic silicon and diatomite. The invention further provides a preparation method of the fertilizer and application of the fertilizer to improvement of water utilization efficiency and nitrogen fertilizer utilization efficiency in the dry-farming potato planting process. The fertilizer has the following advantages that the synergistic interaction is remarkable, the natural ABA, the organic silicon and the nitrification inhibitor have the synergistic effect through a drought resisting-water retention-nitrogen promoting triple path, compared with single-component treatment, the potato yield is increased, and the nitrogen fertilizer utilization rate is increased; the abscisic acid ABA is a natural source ABA, so that chemical toxicity is avoided; the nitrification inhibitor is low in toxicity and easy to degrade, and soil residues are reduced; the organic silicon can change the soil agglomeration structure, increase the water holding capacity of the soil and reduce water infiltration and evaporation, and has great significance in arid and semi-arid regions; the fertilizer can be mixed with a nitrogen-containing fertilizer to be applied, can be processed into an aqueous solution, and is suitable for various dry farming fertilization modes such as drip irrigation, furrow application and hole application.

The invention relates to a potato planting method and application thereof, and belongs to the technical field of agricultural planting. According to the planting method, the bottleneck problems of low efficiency of water resources, soil degradation, serious wind erosion and the like in potato production in arid and semi-arid irrigated areas can be effectively solved, and synergistic improvement of water saving, soil improvement, stress resistance and stable yield is achieved; and a matched mechanical operation system is conveniently further combined to break through the current situation that the mechanical degree of potato production in arid and semi-arid irrigated areas is not high. According to the embodiment verification, compared with a traditional potato planting method, the planting method has the remarkable improvement effect on yield and quality expression, resource utilization efficiency and soil health and stress resistance strengthening.

The invention discloses an arid and semi-arid region irrigation water-deficient area rapid identification and diagnosis method, system, equipment and medium by coupling channel network hydraulics and multi-source remote sensing, and belongs to the technical field of agricultural irrigation management, and the method comprises the steps: obtaining multi-source remote sensing data of a to-be-irrigated area of an arid and semi-arid region, and constructing a spatial data set; remote sensing data correction processing is executed through the spatial data set, and a corrected remote sensing image data set is generated; and constructing a boundary model of the region to be irrigated by combining the corrected remote sensing image data set with auxiliary geographic information. The method comprises the following steps: acquiring and correcting multi-source remote sensing data of a to-be-irrigated area in an arid and semi-arid region to generate an image data set; the method comprises the following steps: establishing a boundary model in combination with geographic information to define a range, calculating a crop water stress index to establish a distribution model to identify a water shortage area, establishing a water delivery constraint model in combination with the boundary model to supply limitation, superposing and integrating multiple models and meteorological data, and constructing a water shortage cause diagnosis model, thereby providing a basis for precise irrigation and water resource optimization.

The invention discloses a dry land tomato cultivation method with straw and mulching film space complementary covering, and belongs to the technical field of agricultural planting. The method comprises the following steps: covering whole corn straw strips (with the width of 90cm and the interval of 50cm) in autumn and winter on the basis of previous crops of corn, adjusting the straw covering strips to 50cm and the uncovered width to 90cm in the next spring, performing rotary tillage and fertilization in the interval rows without covering the straw, laying a mulching film with the width of 50cm, planting tomatoes on two sides of the mulching film, paving redundant straw in the wide rows, and covering the wide rows with the mulching film with the width of 50cm after the tomatoes are planted on the two sides of the mulching film. And a spatial pattern of narrow-row plastic film mulching-wide-row straw mulching is constructed. The narrow-row mulching film can preserve soil moisture and increase temperature in spring and promote early emergence of seedlings, and the wide-row straws can cool, inhibit weeds and fertilize in summer, the advantages of the narrow-row mulching film and the wide-row straws complement each other and cooperatively regulate and control the hydrothermal condition of soil, the contradiction between soil moisture conservation in spring and cooling in summer is solved, high-yield, high-quality and sustainable production of open-field tomatoes in semi-arid and semi-humid areas is realized, and the method has both ecological and economic benefits.

This invention provides an automatic identification method for pasture depressions and reservoirs based on digital elevation models (DEMs), comprising: acquiring topographic data of a target watershed using UAV-borne LiDAR technology to generate an original DEM of the target watershed; eliminating noise from the topographic data based on the DEM to generate a smoothed DEM_F and raster data of potential depression locations, DEM_EX; generating morphologically reconstructed elevation data based on DEM_F to obtain a residual DEM_F model of the target watershed, CS3; processing CS3 using a MATLAB regional connectivity analysis algorithm to identify regional connectivity and generate a preliminary identification result CS4 of embankments protruding from the surface; obtaining a final identification result CS7 of embankments based on CS4; and spatially overlaying analysis of CS7 and DEM_EX to output the three-dimensional coordinates of the depressions and reservoirs. This invention enables rapid and automatic identification of pasture depressions and reservoirs in semi-arid regions.

This invention proposes a method, device, electronic device, and storage medium for estimating soil moisture, relating to the field of soil moisture monitoring technology. The method determines the soil wilting point moisture content of the test area based on soil gravity moisture content test data, and uses the soil dielectric constant corresponding to the wilting point moisture content as a reference soil dielectric constant. Based on ground-penetrating radar images of the test area, the soil dielectric constants at various underground locations in the test area are obtained. Using the reference soil dielectric constant and the soil dielectric constants at various underground locations in the test area, the soil moisture content at each underground location in the test area is estimated. This overcomes the systematic overestimation problem commonly found in existing methods, improving the overall accuracy and robustness of soil volumetric moisture content estimation in key scenarios such as arid, semi-arid regions, and shallow root zones.

The invention discloses a planting method in the early stage of artificial soil application of coal gangue in a semi-arid region, and belongs to the technical field of coal gangue soil utilization. The planting method comprises the following steps: (1) covering a reclamation site with soil by using gangue artificial soil; (2) ridging in a reclamation field; (3) planting in a range from the oblique middle position of the ridge to the ridge surface; and (4) optionally, watering and irrigating. The ridging planting mode is adopted in the early stage of application of the coal gangue artificial soil, the hardening problem in the early stage of application of the coal gangue artificial soil in the semi-arid region is effectively relieved, and normal germination and growth of seeds are ensured.

Disclosed are a preparation process for a seed ball used for ecological restoration, and a sowing method. The preparation process comprises: preparing a wrapping material, preparing a wrapping slurry, and forming a seed ball. In preparing the wrapping material, a protective shell substance and a soil binder are mixed uniformly to obtain the wrapping material. In preparing the wrapping slurry, water is added to the wrapping material and mixed uniformly to obtain the wrapping slurry. In forming the seed ball, the wrapping slurry and plant seeds are processed into a ball to obtain the seed ball. A seed ball prepared by the present invention maintains a high germination success rate and survival rate even in degraded land environments in arid and semi-arid regions.

The present application relates to a kind of high-efficiency closed-loop drought-resistant afforestation method specially designed for no road, no water source barren mountain, belong to the technical field of barren mountain ecological restoration.The method first integrally roots pretreatment, unmanned aerial vehicle transportation, planting and water collection, controllable water replenishment, surface soil conservation and equipment recycling six core links, through unmanned aerial vehicle integrated seedling transportation, drip irrigation bag precision water control and geotextile full coverage soil conservation multidimensional cooperation, build the most water-saving, whole-process environmental protection afforestation system.Core equipment can be recycled and reused, realize the complete closed loop of material flow and construction flow, completely overcome the long-term technical bottleneck of traditional afforestation in extreme environment, such as high transportation cost, serious water resource waste, difficult to continue in later period management and protection, etc., seedling survival rate is significantly improved.The present application provides a revolutionary solution for the ecological restoration of arid and semiarid regions, with high survival rate, low environmental load, sustainable operation and economic feasibility, and injects new energy into the afforestation of barren mountains.

The invention relates to the technical field of ecological hydrology and river ecological restoration, and particularly discloses an arid and semi-arid region dry season ecological base flow calculation method which comprises the following steps: S1, based on actually measured hydrological large section data, establishing a relation curve of a water level and a wetted week; s2, identifying a sudden change point in the water level-wetted week relation curve, and taking the water level corresponding to the sudden change point as a beach protection threshold value; s3, ecological constraint conditions are determined according to habitat water depth requirements of main aquatic organisms, the suitable water depth of sturgeon is 2-4 m, the suitable average water depth of salmon is 0.5 m, and the suitable average water depth of general fish is 0.3 m; and S4, establishing a water level-flow relation curve by using actually measured day-by-day water level-flow data, and reversely deducing a corresponding flow value by using a beach abrupt change point water level or a biological constraint water depth to obtain a dry season ecological base flow. According to the calculation method for the dry season ecological base flow in the arid and semi-arid region, the beach protection threshold value can be recognized based on the wetted week sudden change of the cross section of the river channel.