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30 results about "SWAT model" patented technology
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SWAT (Soil & Water Assessment Tool) is a river basin scale model developed to quantify the impact of land management practices in large, complex watersheds. SWAT is a public domain software enabled model actively supported by the USDA Agricultural Research Service at the Blackland Research & Extension Center in Temple, Texas, USA. It is a hydrology model with the following components: weather, surface runoff, return flow, percolation, evapotranspiration, transmission losses, pond and reservoir storage, crop growth and irrigation, groundwater flow, reach routing, nutrient and pesticide loading, and water transfer. SWAT can be considered a watershed hydrological transport model. This model is used worldwide and is continuously under development. As of July 2012, more than 1000 peer-reviewed articles have been published that document its various applications.
Runoff change attribution recognition method considering land utilization spatial-temporal evolution
ActiveCN107463730AFully consider the impactDesign optimisation/simulationSpecial data processing applicationsModel parametersSpacetime
The invention discloses a runoff change attribution recognition method considering land utilization spatial-temporal evolution. The method comprises the steps that a research period is divided into a natural period and a change period according to runoff sudden change characteristics; the change period is segmented according to land utilization evolution characteristics; a basin SWAT model is established; model parameters are calibrated; and basin runoff change is calculated in a segment-by-segment item-by-item rolling and attribution quantification mode. Through the method, the change period is finely divided according to the evolution characteristics of land utilization to fully consider land utilization evolution conditions, basin underlying surface characteristics can be accurately described and hydrologic process characteristics can be effectively simulated based on the SWAT model, a basin distributed hydrologic model is established to describe the hydrologic process, and influences of land utilization evolution on runoff are fully considered in an attribution quantification recognition result obtained by calculating the runoff change in the basin research period in a segment-by-segment item-by-item rolling mode.
Owner:HOHAI UNIV
Method for simulating nitrogen and phosphorus pollution load of lake in region with developed irrigation system
InactiveCN106250666AImprove accuracyImprove applicabilitySpecial data processing applicationsInformaticsTotal nitrogenPoint source pollution
The invention discloses a method for simulating a nitrogen and phosphorus pollution load of a lake in a region with a developed irrigation system. The method comprises the following steps of (1) analyzing an irrigation and drainage system in a research region; (2) building and calibrating an SWAT model, preparing and formatting model input data, and calibrating and verifying the model; and (3) calculating total nitrogen and total phosphorus. Compared with the prior art, the method has the advantages that various data of a DEM (Digital Elevation Model), soil, weather, land utilization and the like is collected and arranged and is formatted on the basis of analyzing the irrigation and drainage system in the research region to finish building of the SWAT model, the model is calibrated in combination with runoff data actually measured for years by a hydrological station in the research region, and finally the total nitrogen and total phosphorus pollution load of the lake is calculated according to a migration and transfer process and principle of the SWAT model for non-point source pollution, thereby realizing simulation analysis on the nitrogen and phosphorus pollution load of the lake in the region with the developed irrigation system. The method can be widely applied to the simulation calculation of the nitrogen and phosphorus pollution load of the lake in the region with the developed irrigation system.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Response analysis method for surface water quality to climate change
The invention discloses a response analysis method for surface water quality to a climate change. The method is characterized by comprising the following steps of: 1, prediction of a future climate change factor change trend, 2, building and calibration of an SWAT model, 3, calculation of total nitrogen and total phosphorus, and 4, a response of the surface water quality to the climate change. Compared with the prior art, the method based on future climate prediction, the SWAT hydrological model and statistical analysis simulates influences on the surface water quality change by climate change factors such as temperature and rainfall through setting different temperature change scenes and rainfall change scenes, simulation study on the water quality influences by the climate change is developed with the SWAT hydrological model as a basis, a response relation between the climate change and the water quality change is built, and response analysis of the surface water quality to the climate change can be carried out. The method of the invention can be widely applied to response study on the surface water quality to the climate change, particularly response analysis of the surface water quality in Hetao areas to the climate change.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Analysis method of response of surface water quality to drought and flood events
InactiveCN106202857AAnalyze Response RelationshipsSpecial data processing applicationsInformaticsTotal nitrogenBusiness forecasting
The invention discloses an analysis method of response of surface water quality to drought and flood events. The analysis method is characterized by comprising the following steps: step one, analyzing historical evolution and developing trend of drought and flood events; step two, building and calibrating an SWAT model; step three, calculating total nitrogen and total phosphorus; and step four, analyzing response of the surface water quality to the drought and flood events. Compared with the prior art, the analysis method is capable of screening typical representative months of drought events, flood events and drought and flood sudden turning events by combining indexes such as a standardized precipitation index, 24-hour precipitation amount and continuous non-rainy days and the like based on climate model forecasting results, the SWAT model and a statistic analysis method, comparing and analyzing the influence of drought and flood events to the water quality of the typical months and effectively analyzing a response relationship between the surface water quality change and the drought and flood events. The analysis method is especially applicable to analysis of the response of the surface water quality to the drought and flood events in the Hetao area.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
A runoff forecasting method for uncontrolled area based on the coupling of hydrological and hydrodynamic models
InactiveCN109446604ADesign optimisation/simulationSpecial data processing applicationsRiver networkCoupling
The invention provides a runoff forecasting method for an uncontrolled area based on coupling of hydrological and hydrodynamic models, which is characterized in that the method comprises the followingsteps of 1 constructing a river network basin structure of a control area by using a SWAT model; 2 constructing a lake hydrodynamic model without considering runoff of an uncontrolled area by using aDelft3D model; 3 coupling the hydrological model of the basin with the hydrodynamic model of the lake, constructing the structure of the river network in the uncontrolled area; constructing the SWATmodel of the whole watershed to calculate the runoff of the uncontrolled area; carrying out the runoff distribution in uncontrolled area; constructing a lake hydrodynamic model considering runoff in uncontrolled area; 4 verifying the runoff simulation results in uncontrolled area. The simulation accuracy of runoff in uncontrolled area is verified by comparing the simulation accuracy of runoff in outlet of lake hydrodynamic model with runoff in uncontrolled area and without runoff in uncontrolled area.
Owner:WUHAN UNIV
SWAT (soil and water assessment tool)-model-based basin natural runoff calculation method
ActiveCN107403036AImprove reliabilityImprove efficiencyDesign optimisation/simulationSpecial data processing applicationsDrainage basinNatural water
The invention discloses an SWAT (soil and water assessment tool)-model-based basin natural runoff calculation method. The SWAT-model-based basin natural runoff calculation method includes creating a basin SWAT model; determining parameter values of natural sub basins and verifying accuracy of the parameter values according to the SUFI-2 method; creating correlation between sub basin parameters and natural sub basin parameters; inputting the parameters, and calculating basin natural water resource according to the SWAT model. The SWAT-model-based basin natural runoff calculation method has the advantages that runoff information, capable of reflecting basin natural runoff conditions, of the natural sub basins is fully utilized, the correlation between the typical sub basin parameters and sub basin parameters with huge underlying surface changes is created, the parameters with low uncertainty are distributed to other areas, and accordingly, reliability of the natural runoff simulation value of the whole target basin is improved; a new method and a new thought are provided for calculation of natural runoffs.
Owner:HOHAI UNIV
Method for estimating nitrogen and phosphorus pollution in drainage basin based on spatial remote sensing technology
ActiveCN108647401AHigh precisionAvoid random samplingDesign optimisation/simulationResourcesDrainage basinMoisture
The invention relates to a method for estimating nitrogen and phosphorus pollution in a drainage basin based on a spatial remote sensing technology. The method specifically comprises the following steps: step one: selecting a typical small drainage basin, acquiring and analyzing the soil moisture remote sensing data of the whole drainage basin; step two: carrying out drainage basin non-point source pollution SWAT model simulation; step three: using the drainage basin soil moisture spatial remote data to verify model simulation result; step four: establishing the soil moisture and non-point source nitrogen and phosphorus loss load response relationship; step 5: estimating nitrogen and phosphorus pollution in the drainage basin based on the spatial remote sensing technology. The method of the invention uses the remote sensing technology for analysis so as to avoid large-scale random sampling, improve the efficiency and feasibility of operation, and save cost; secondly, the method combines the soil moisture remote sensing technology and the SWAT model simulation, thereby improving the accuracy of the drainage basin non-point source nitrogen and phosphorus pollution simulation; thirdly, only by obtaining the soil moisture remote sensing data can the drainage basin non-point source pollution estimation be simply achieved.
Owner:BEIJING NORMAL UNIVERSITY
Hydrological drought assessment method in climatic change scene
PendingCN111797129AMethod is feasibleReal and objective description of dynamic evolution characteristicsWeather condition predictionGeographical information databasesHydrometryAtmospheric sciences
The invention discloses a hydrological drought assessment method in a climatic change scene, which comprises the following steps: firstly, collecting meteorological, hydrological and topographic dataof a research area, and constructing an SWAT hydrological model database; obtaining a future meteorological sequence through a multivariable deviation correction method based on M global climate modes, and inputting the future meteorological sequence into an SWAT model to obtain M groups of future runoff sequences; calculating M groups of standardized runoff indexes, and extracting drought characteristic values through a run-length theory; calculating a key index PI influencing the regional drought, taking the key index PI as a covariable, and constructing a two-variable hydrological drought joint probability distribution function under a non-consistency condition; based on the most probable combined scene, separately solving drought duration and intensity of M groups of historical reference time periods and future time periods in different joint recurrence periods; and based on the medians of the M groups of most probable scenes, quantizing the change of the drought characteristic values, and evaluating the influence of climate change on the future hydrological drought situation of the drainage basin. The method is good in evaluation reliability, and provides a practical value fordealing with future climate disasters.
Owner:WUHAN UNIV
Design method of distributed water circulation model based on multi-source mutual aid water supply mode
ActiveCN113407897AHandle non-overlapping issuesMeet the needs of the combinationForecastingSeismologyWater useWater source
The invention provides a design method of a distributed water circulation model based on a multi-source mutual aid water supply mode. The design method comprises the steps of S1, performing nested HRU division; S2, performing HRU attribute design; S3, designing a multi-source mutual aid water supply module; and S4, improving the SWAT model. On the basis of the SWAT model, a distributed natural-artificial water circulation dynamic mutual feedback simulation model is developed, so that the model has the functions of dynamic mutual feedback of natural water circulation and artificial lateral branch water circulation and integrated simulation of water resource development, utilization and regulation; according to the invention, drainage basin natural-artificial water circulation process simulation based on urban multi-water-source water supply and multi-water-source irrigation water supply modes can be completed, the influence of the water circulation process on artificial water taking and using is reflected, and the real-time intervention effect of water resource development, utilization and regulation on the water circulation process is also reflected; and therefore, a scientific reference basis is provided for deeply knowing a drainage basin water circulation mechanism under the influence of strong human activities and reasonably developing and utilizing water resources.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Method for monitoring response of hydrological process to climate change based on SWAT model
PendingCN110674467AGet Response LawData processing applicationsComplex mathematical operationsClimate changeAtmospheric sciences
The invention provides a method for monitoring response of a hydrological process to climate change based on an SWAT model. The method is characterized by comprising the following steps: step 1, acquiring various data of the hydrological process; step 2, establishing a corresponding SWAT model; and step 3, applying various data to the SWAT model, and performing response analysis and monitoring ofthe hydrological process to climate change.
Owner:NANJING HYDRAULIC RES INST
Improvement of simulation of watershed hydrological process based on SWAT model and application method
PendingCN109616223AImplement year-by-year callsInformaticsInstrumentsGroundwater rechargeWater circulation
According to the invention, land utilization / cover is a key parameter for hydrological process simulation, and affects hydrological processes such as interception, infiltration, evapotranspiration, and groundwater recharge; and in areas strongly interfered by human activities, a type of land utilization / cover can be drastically changed, thereby affecting a water circulation process of a watershed.SWAT is a widely used distributed hydrological model. During a simulation period with the SWAT, land utilization / cover data cannot be called year by year, that is, the change in land utilization / cover time is ignored, which may affect application of the SWAT in areas with severe land utilization / cover changes. Aiming at this shortcoming of an SWAT model, the invention improves the SWAT model anddevelops an LU-SWAT model that can call land utilization / cover data year by year. Runoff simulation results of the SWAT and LU-SWAT models are compared in the middle reaches of Heihe River where landutilization / cover changes are severe, and a comparison result proves that the LU-SWAT model is more suitable for water circulation simulation in the middle reaches of Heihe River.
Owner:金鑫
A method of optimal allocation of agricultural non-point source management measures combination based on ecological service function
ActiveCN109376955AMaximum water purificationMaximize water production efficiencyForecastingICT adaptationGenetic algorithmSoil hydrology
The invention discloses a method of optimal allocation of agricultural non-point source management measures combination based on an ecological service function. The method comprises the following steps: 1) collecting data of a target research area and constructing a watershed SWAT model of the target research area; 2) According to the slope condition and the type of soil hydrology group, selectingthe agricultural non-point source management measures in the target research area; 3) calculating that cost of the existing management measure and the selected agricultural non-point source management measures of the watershed where the target research area is locate, and constructing a cost database of each management measure; 3) adjusting that key characteristic parameters of the SWAT model ofthe watershed, respectively simulate the reduction efficiency of the target pollutants by different management measures, and generating an ecological benefit database for the implementation of the measure; 4) adopting an Adaptive multi-objective genetic algorithm to calculate the cost database and the ecological benefit database, and the optimal cost-benefit curves of different target pollutants are obtained, and the optimal allocation scheme of agricultural non-point source management measures in the target research area is obtained.
Owner:CAPITAL NORMAL UNIVERSITY
Comprehensive drought monitoring and evaluation method based on hydrological process
PendingCN113887972ASensitive captureReal and objective reflection of evolution characteristicsResourcesHydrometryWater resources
The invention belongs to the field of hydrology and water resources, and particularly relates to a comprehensive drought monitoring and evaluation method based on a hydrological process. The method comprises the steps of S1, constructing, calibrating and verifying a distributed hydrological model; S2, carrying out edge distribution fitting; S3, constructing a comprehensive drought index SPERI; and S4, carrying out drought evolution analysis based on the comprehensive drought index SPERI. From the perspective of water circulation, the comprehensive drought index SPERI considering hydrological and meteorological factors is constructed by applying an SWAT model and a Copula function, and the comprehensive drought index SPERI has relatively strong physical significance and statistical basis, can sensitively capture the occurrence process of a drought event, and can truly and objectively reflect the evolution characteristics of regional drought. Meanwhile, identification and multivariable recurrence period analysis are performed on characteristic variables such as drought duration, intensity and peak value based on the index, so that powerful support can be provided for drought monitoring and evaluation.
Owner:INST OF WATER RESOURCES FOR PASTERAL AREA MINIST OF WATER RESOURCES P R C
Method and system for hydrological simulation of shrimp-rice co-cropping area based on SWAT improved model
ActiveCN113283718AConvenient researchFast simulationClimate change adaptationWatering devicesHydrological modellingWater storage
Disclosed are a method and system for hydrological simulation of a shrimp-rice co-cropping area based on SWAT improved model. Hydrological simulation can be rapidly and accurately carried out on the prawn and rice co-culture area, and reliable guarantee is provided for scientific and reasonable implementation of prawn and rice co-culture water resources allocation and regional flood control and drainage. The method comprises the following steps: step I, improving a pot hole module configuration of an SWAT model, and setting and improving a cone in an original SWAT model into a shrimp-rice co-cropping area structure with rectangular shrimp ditches on the periphery and a rice field in the middle; setting an improved calculation method for the effective water storage area of the shrimp-rice co-cropping area; step II, improving an evapotranspiration algorithm; step III, improving an infiltration amount algorithm; step IV, constructing an irrigation module; step V, constructing a drainage module; and VI, making hydrological simulation: inputting parameter data required by the model based on actual measurement data and simulation requirements of a to-be-simulated region, then operating the model, and carrying out hydrological simulation under shrimp-rice co-culture.
Owner:湖北省水利水电科学研究院
Hydrological forecasting method and device
InactiveCN111079282AExtend the effective forecast periodAccurate graspForecastingDesign optimisation/simulationHydrometryAtmospheric sciences
The embodiment of the invention provides a hydrological forecasting method and device, and the method comprises the steps: inputting historical monthly-scale meteorological data into a numerical weather generator model CLIGEN, and determining future daily-scale meteorological data according to the historical monthly-scale meteorological data through a CLIGEN model; and inputting the future daily scale meteorological data into a distributed hydrological model SWAT, performing runoff simulation according to the future daily scale meteorological data through the SWAT model to obtain a runoff simulation result, and estimating and publishing long-term hydrological forecast data according to the runoff simulation result. According to the embodiment of the invention, the effective forecast periodcan be prolonged, so that people can more accurately master the global climate change of ten to hundred years or more under the global warming trend.
Owner:BEIJING NORMAL UNIVERSITY
A mine ecological restoration method based on ecological zoning
PendingCN109190224ATo achieve the purpose of ecological restorationLow costDesign optimisation/simulationSpecial data processing applicationsRestoration methodVegetation cover
The invention is applicable to the technical field of ecological restoration, in particular to a mine ecological restoration method based on ecological zoning. The method comprises the steps of obtaining the basic data of the mine to be restored and establishing the SWAT model of soil and water loss evaluation; according to the SWAT model, performing ecological zoning and obtaining the soil and water loss of each ecological zone; adopting a scene analysis-test correction method to determine the repair measures. The invention starts from two major factors of soil and vegetation that affect mineecological restoration, and, through data collection, carries out ecological zoning and soil and water loss evaluation on the mine to be restored, so that soil improvement and ecological restorationmeasures of vegetation cover can be quantitatively determined simply and at low cost.
Owner:SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
Typhoon early warning system based on power grid geographical information
InactiveCN106405684ATimely defensive measuresAccurately grasp the typhoon trendHuman health protectionWeather condition predictionEarly warning systemPower grid
The invention relates to a typhoon early warning system based on power grid geographical information. The system comprises a positioning system, a monitoring system connected with the positioning system, an evaluation module connected with the monitoring system and a simulation early warning system connected with the evaluation model. The positioning system employs a GIS power grid platform system for performing coordinate positioning on an early warning area and determines a concrete position the early warning area in a map of the GIS power grid platform system according to coordinates; the monitoring system monitors typhoon information in real time and transmits the information to the evaluation model; the evaluation model, according to the information transmitted by the monitoring system, determines typhoon data, establishes a meteorological layer which is used for presenting basic geological data, typhoon path data, hazard-affected body data and disaster-inducing factor data; and the simulation early warning system inputs a fault route and analyzes and predicts a future development trend of a typhoon according to the meteorological layer by use of an SWAT model. The typhoon early warning system based on the power grid geographical information, provided by the invention, gives an early warning of typhoon information so as to reduce damage caused by the typhoon to people to the lowest.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
CNN-based land-water integrated river water quality space-time continuous prediction method
PendingCN114399103ARealize two-dimensional spatiotemporal continuous predictionPrediction of continuous distribution of water qualityGeneral water supply conservationForecastingStream flowPredictive methods
The invention discloses a CNN-based land-water integrated river water quality space-time continuous prediction method, which comprises the following steps: carrying out runoff simulation on each sub-basin of a river basin based on an SWAT model to obtain a runoff simulation result of each sub-basin; based on the EFDC model, inputting the runoff result of each sub-basin as the flow boundary of the EFDC model, inputting the pollutant flux as the water quality boundary of the EFDC model, and simulating to obtain a water quality space-time continuous distribution image; constructing a CNN model, inputting the obtained water quality space-time continuous distribution image as a training sample, and training the CNN model; and utilizing the trained CNN model to carry out river water quality space-time continuous prediction, and predicting a space-time continuous distribution water quality result for an input discrete section water quality result. Omnibearing time-space continuous prediction of basin water quality by an artificial intelligence technology is realized, and powerful technical support can be provided for water environment supervision.
Owner:BEIJING NORMAL UNIVERSITY
Agricultural non-point source pollution risk diagnosis method suitable for irrigation area
PendingCN111882182AAvoid large-scale data collectionImprove evaluation efficiencyResourcesEnvironmental resource managementEnvironmental engineering
The invention discloses an agricultural non-point source pollution risk diagnosis method suitable for an irrigation area. The method comprises the following steps: collecting and processing information; carrying out the operations: agricultural non-point source pollution migration rule research and influence factor identification in an irrigation area; determining influence factors which have relatively large influence on agricultural non-point source pollution in the irrigation area, and respectively calculating the influence factors to form a factor spatial database; performing standardization processing and dimension reduction processing on the influence factors in the factor database, and converting the influence factors into 23 principal components; determining an agricultural non-point source pollution risk diagnosis formula in the irrigation area, calculating an agricultural non-point source pollution risk index of each sub-basin, and performing grading; performing simulation byusing a distributed SWAT model to obtain an agricultural non-point source pollution risk index simulation result of each sub-basin; and judging the accuracy of the calculation result according to thesimulation result. The method can accurately diagnose the agricultural non-point source pollution risk, improves the diagnosis efficiency and feasibility, and saves the cost.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
Method, device, medium and equipment for automatically regulating and controlling water volume and water quality of watershed scale
PendingCN114818324AReduce labor costsImprove efficiencyDesign optimisation/simulationResourcesWater volumeWater quality
The invention relates to a watershed scale water volume and water quality automatic regulation and control method and device, a storage medium and electronic equipment. The method comprises the following steps: constructing a watershed SWAT model, verifying model parameters of the watershed SWAT model, obtaining the verified watershed SWAT model, and obtaining meteorological data of a target area predicted by an atmospheric circulation mode in a target time period; and obtaining target water quantity and water quality of the target area in the target time period, inputting meteorological data into the verified watershed SWAT model, and obtaining the water quantity and water quality of the target area in the target time period. And a non-dominated sorting genetic method with an elitist strategy is adopted to adjust the water quantity and water quality regulation measure parameters of the optimal management measure in the verified watershed SWAT model until the deviation between the water quantity and water quality of the target time period and the target water quantity and water quality is within a preset threshold range, and the water quantity and water quality regulation measure of the target area is obtained. The labor cost is reduced, and the efficiency and precision of water quantity and water quality regulation and control are improved.
Owner:GUANGDONG UNIV OF TECH
Hydrological simulation method and system for shrimp and rice co-cropping area based on swat improved model
ActiveCN113283718BConvenient researchFast simulationClimate change adaptationWatering devicesHydrological modellingWater storage
The present invention provides a hydrological simulation method and system for a shrimp-rice co-cropping area based on the improved SWAT model, which can quickly and accurately perform hydrological simulation on the shrimp-rice co-cropping area, and provide scientific and rational implementation of shrimp-rice co-cropping water resource allocation and regional flood control and drainage Provided a reliable guarantee. The method includes: step I. improving the pothole module configuration of the SWAT model, improving the cone setting in the original SWAT model to a shrimp-rice co-cropping area structure with a rectangular shrimp ditch in the middle of the paddy field; and setting the improved Calculation method of effective water storage area in shrimp-rice co-cropping area; Step II. Improvement of evapotranspiration algorithm; Step III. Improvement of infiltration amount algorithm; Step IV. Construction of irrigation module; Step V. Construction of drainage module; Step VI .Hydrological simulation: Based on the measured data and simulation requirements of the area to be simulated, input the parameter data required by the model, and then run the model to perform hydrological simulation under the co-cropping of shrimp and rice.
Owner:湖北省水利水电科学研究院
Monthly runoff prediction method for drainage basin cascade reservoir system
InactiveCN113139684ASolving the challenge of long-term runoff forecastingImprove accuracyEnsemble learningForecastingHydrometryAtmospheric sciences
The invention relates to the field of long-term runoff prediction in drainage basins. According to the technical scheme, a monthly runoff prediction method for a drainage basin cascade reservoir system comprises the following steps: S1, obtaining data, and according to the obtained data, calculating CFS lattice point monthly rainfall and drainage basin actually-measured daily and lunar surface average rainfall; S2, fitting a regression relationship between the monthly rainfall of the CFS grid point in the drainage basin in different prediction periods and the actually measured lunar surface rainfall of the drainage basin, and using the relationship for correction of CFS prediction to obtain the lunar surface rainfall of the drainage basin in the next nine months; S3, carrying out time-space downscaling on the predicted lunar surface rainfall of the drainage basin; S4, constructing a distributed hydrological model SWAT suitable for the cascade reservoir system; and S5, predicting the monthly reservoir inflow of each reservoir of the cascade reservoir system by using an SWAT model constructed by predicting the daily scale rainfall of the sub-basin obtained in the S3. The method can predict medium-and-long-term monthly runoff of each reservoir section, and solves the problem of medium-and-long-term runoff prediction of cascade reservoirs in drainage basins.
Owner:ZHEJIANG INST OF HYDRAULICS & ESTUARY
Design method of distributed water cycle model based on multi-source mutual aid water supply model
ActiveCN113407897BHandle non-overlapping issuesMeet the needs of the combinationForecastingSeismologyWater useWater source
The present invention provides a design method of a distributed water cycle model based on a multi-source mutual aid water supply model, including: step S1, nested HRU division; step S2, HRU attribute design; step S3, multi-source mutual aid water supply module design; Step S4, SWAT model improvement. Based on the SWAT model, the present invention develops a distributed natural-artificial water cycle dynamic mutual-feedback simulation model, which enables it to have the dynamic mutual-feedback of natural water cycle and artificial side branch water cycle, and the integrated simulation functions of water resources development, utilization and regulation, and can Completed the simulation of the natural-artificial water cycle process in the basin based on the urban multi-source water supply and multi-source irrigation water supply model, which not only reflects the impact of the water cycle process on artificial water intake, but also reflects the real-time intervention of water resource development, utilization and regulation on the water cycle process, thereby It provides a scientific reference for in-depth understanding of the basin water cycle mechanism under the influence of strong human activities, and rational development and utilization of water resources.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
A Runoff Change Attribution Identification Method Considering the Temporal and Spatial Evolution of Land Use
ActiveCN107463730BFully consider the impactDesign optimisation/simulationSpecial data processing applicationsModel parametersSpacetime
Owner:HOHAI UNIV
Quantitative evaluation method for water resource shortage
PendingCN114418446AImprove accuracyFully reflect resourcesGeneral water supply conservationResourcesWater useHydrometry
The invention discloses a quantitative evaluation method for water resource shortage, and belongs to the technical field of water resource evaluation. The method aims at solving the problem that an existing water resource shortage evaluation method only considers the water quantity and neglects the water quality, so that the accuracy of an evaluation result is poor. Comprising the following steps: dividing a target drainage basin into sub-drainage basins; performing hydrological response unit division on each sub-basin by adopting an SWAT initial model; dividing hydrological response units corresponding to the actually measured hydrological data in the database into a training set and a verification set; performing parameter calibration and verification on the SWAT initial model by adopting the training set and the verification set to obtain a final SWAT model; calculating the unit available water amount and the unit water quality; determining the required water quality and the required water quantity of each water consumption type according to the water consumption type; according to the unit available water amount, the unit water quality and the required water quality and the required water amount of each water consumption type, water amount type water deficit amount evaluation and water quality type water deficit amount evaluation are carried out respectively. The method is used for evaluating the water deficit of the target drainage basin.
Owner:HARBIN INST OF TECH +1
Comprehensive evaluation method for influence of climate change on river runoff
PendingCN112818607AMultiple attribution analysis is objective and accurateDesign optimisation/simulationSoil scienceWater resource planning
The invention discloses a method for comprehensively evaluating the influence of climate change on river runoff. The method comprises the following steps: acquiring climate parameters and spatial and temporal change characteristics of the river runoff; analyzing and inspecting the change trend of the climate parameters and the river runoff by adopting an MK trend inspection method based on improved over-whitening, and determining mutation points of the climate parameters and the river runoff; dividing a period before the mutation point into a natural period, and dividing a period after the mutation point into an influence period; based on an SWAT model and an elastic coefficient method, calculating annual average runoff variation caused by climate change in the influence period; and calculating the influence of the climate change on the runoff change according to the annual average runoff change quantity caused by the climate change. According to the method, the multivariate attribution analysis of the climate change on the river runoff change is more objective and accurate, and the method has important practical significance in the aspects of basin water resource evolution analysis and identification, water resource planning management, disaster prevention and reduction, water safety and the like in a changing environment.
Owner:CHANGCHUN INST OF TECH
Humid region sediment yield estimation method based on amended rainstorm river network fractal
InactiveCN106503419ASimple methodUse less parameter variablesSpecial data processing applicationsInformaticsRiver networkLinear fitting
The invention belongs to the field of area soil erosion and particular relates to a humid region sediment yield estimation method based on amended rainstorm river network fractal. The estimation method comprises the steps that annual sediment yield Y is calculated according to a river network fractal value X1 obtained by adopting a river network fractal calculation method and annular storm rainfall X2 based on an SWAT model, linear fitting is performed to obtain a liner fitting equation, the X1 and the X2 are substituted to the liner fitting equation to obtain Y', linear fitting is conducted on the Y' and Y to obtain correlation coefficients of the Y' and Y; X1 in other areas is obtained by adopting the river network fractal calculation method, meteorological station data is queried to obtain X2 in other areas, the X1 and X2 are substituted to the equation, and the annual sediment yield in a certain humid region can be estimated. The method is simpler and more convenient compared with the SWAT and other methods, used parametric variables are few, estimation results are accurate, the method is suitable for rainstorm often occurred areas high in sediment yield, and the practical significance of the method is increased.
Owner:BINZHOU UNIV
A combination optimization configuration method of agricultural non-point source best management measures based on ecological service function
ActiveCN109376955BEnhancement of ecological and environmental benefits of the watershedImprovement of ecological and environmental benefitsForecastingICT adaptationEnvironmental resource managementSoil hydrology
Owner:CAPITAL NORMAL UNIVERSITY
A method for assessing the water environment security of a watershed based on the risk of non-point source nitrogen and phosphorus loss
ActiveCN108536908BAccurate estimateHelp to reflect the characteristics of spatiotemporal heterogeneityDesign optimisation/simulationGeographical information databasesRainfall runoffBasin scale
A method for assessing the water environment safety of a basin based on the risk of non-point source nitrogen and phosphorus loss. The steps are as follows: 1. Selection of research area, SWAT model to simulate nitrogen and phosphorus loss load; 2. Calculation of rainfall runoff factor; 3. Soil permeability factor 4. Calculation of transport distance factors; 5. Data standardization; 6. Calculation of evaluation index weights; The invention can realize the accurate estimation of non-point source nitrogen and phosphorus loss at the watershed scale, and helps to reflect the temporal and spatial heterogeneity characteristics of non-point source nitrogen and phosphorus loss, and also contributes to the optimal management of water environment in the watershed. The invention helps to establish the relationship between the water environment safety of the basin and the time-space distribution of non-point source nitrogen and phosphorus loss, can quickly and effectively identify the key source area of opinion loss during the critical period of non-point source nitrogen and phosphorus loss risk, and can contribute to the scientific management of the water environment of the basin Provide guidance and assistance.
Owner:BEIJING NORMAL UNIVERSITY
Calculation Method of Watershed Natural Runoff Based on swat Model
ActiveCN107403036BImprove reliabilityImprove efficiencyDesign optimisation/simulationSpecial data processing applicationsNatural waterDrainage basin
The invention discloses an SWAT (soil and water assessment tool)-model-based basin natural runoff calculation method. The SWAT-model-based basin natural runoff calculation method includes creating a basin SWAT model; determining parameter values of natural sub basins and verifying accuracy of the parameter values according to the SUFI-2 method; creating correlation between sub basin parameters and natural sub basin parameters; inputting the parameters, and calculating basin natural water resource according to the SWAT model. The SWAT-model-based basin natural runoff calculation method has the advantages that runoff information, capable of reflecting basin natural runoff conditions, of the natural sub basins is fully utilized, the correlation between the typical sub basin parameters and sub basin parameters with huge underlying surface changes is created, the parameters with low uncertainty are distributed to other areas, and accordingly, reliability of the natural runoff simulation value of the whole target basin is improved; a new method and a new thought are provided for calculation of natural runoffs.
Owner:HOHAI UNIV
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