72 results about "River runoff" patented technology

The invention discloses a quantitative analysis method for river runoff change caused by climate change and human activities. The method comprises the steps of collecting hydrological and meteorological information, water resource evaluation data and human activity information in a basin, judging a mutation point of an annual runoff process, wherein the part before the mutation point is a natural stage of the basin and the part after the mutation point is an influence stage of the basin, the entire natural runoff sequence is reconstructed by using the hydrological and meteorological information of the natural stage, using hydrological model rating model parameters and then using meteorological information of the whole period, and analyzing the contribution of climate change and human activities to the river runoff change by using the difference between the reconstructed natural runoff and the actually measured runoff. By adopting the quantitative analysis method for river runoff change caused by climate change and human activities, in combination with situations such as hydrological and meteorological factor changes, land use changes and water use in the basin, the binary attribution analysis of the river runoff change caused by climate change and human activities is extended to quaternary attribution analysis of the river runoff change caused by rainfall change, climate change, land use change and water use.

The invention discloses an ecological comprehensive treatment system of a northern mountain river channel. The system comprises three sub ecological systems of an ecological permeable dike built on the upstream of a main stream and a branch stream of a mountain river, a reservoir pond arranged at the middle and downstream area of the mountain river and a wet land communicated with the reservoir pond, and adopts an ecological treatment mode of closure-storage-preservation. The construction method comprises the steps of: a) building of the ecological permeable dike; b) setting of a triangular pyramidal wood pile stone cage; c) building of the reservoir pond; d) planting of plants of the reservoir pond; e) building of a wet land system; and f) recovery of a river bank band. The system and the construction method can effectively intercept the mountain debris flow and the river non-point source pollution, adjust the river runoff, improve the hydrologic conditions of the mountain river in non-flood season, decrease the dry season of the mountain river, and facilitate to recover the ecological system of the mountain river. Meanwhile, traditional depressions and empty ponds in the mountain river can be used in construction, so that the engineering building cost is reduced, and the self-cleaning capacity of river water is improved.

The invention relates to a method for monitoring river runoff through a remote-sensing hydrologic station. The method comprises the steps of 1, selecting key fluvial sections lacking measuring stationareas; 2, conducting low-altitude remote sensing retrieval on the information of the fluvial sections lacking the measuring station areas; conducting real-time drone control flight on monitoring points of the fluvial sections selected in step 1, preprocessing the obtained data, extracting earth surface information, obtaining the longitudinal section gradient, the cross section area and the watersurface width of the fluvial sections on this basis, combining ground water level monitoring and underwater topographic surveying and mapping, and utilizing a manning formula for deduction to solve the flow of the monitored section. The method has the advantages that satellite remote sensing and low-altitude remote sensing are coupled, each other's advantages are complemented, and the blank of thelack of hydrologic data is filled up; during emergency management, the real-time river channel segment width is obtained, the river runoff is calculated, the river runoff data is reported in real time, and the runoff monitoring precision is smaller than 8%; the problem that hydrometric stations of an arid region are scarce, and cannot handle flood, water pollution and other emergency events is solved.

The invention provides a method for comprehensively assessing influences, on river runoffs, of human activities and climatic changes. The method comprises the following steps of: acquiring runoff data, temperature data and rainfall data in a drainage basin; respectively establishing a runoff long sequence, a temperature long sequence and a rainfall long sequence according to the runoff data, the temperature data and the rainfall data, and determining mutational points of the runoff long sequence, the temperature long sequence and the rainfall long sequence; taking a period before the mutational points as a natural periods and taking a period after the mutational points as an influence period; calculating an annual mean runoff change amount caused by climatic changes and an annual mean runoff change amount caused by human activities through a hydrological model method and an elastic coefficient method; and calculating influences, on the runoff change, of the human activities and the climatic changes according to the annual mean runoff change amount caused by the climatic changes and the annual mean runoff change amount caused by the human activities. The method is capable of effectively improving the evaluation objectivity and correctness.

The embodiment of the invention provides a parameter optimization method and system for a river runoff and sediment model. The method specifically comprises the steps of generating a model calculationgrid; collecting an initial field and boundary information of a region to be predicted of a riverway, and forming an information file of the region to be predicted; discretely solving the runoff andsediment model according to the information file of the region to be predicted; adopting a Latin hypercube sampling method LHS to conduct stratified sampling on multiple parameters of the runoff and sediment model in a feasible region, and obtaining multiple parameter groups; based on the combination of model parameters, solving the river runoff and sediment model, obtaining the corresponding likelihood values of each parameter group; setting a likelihood threshold, and deleting the corresponding parameter groups with the likelihood values lower than the preset threshold; sorting the likelihood values corresponding to the remaining parameter groups to determine an uncertainty interval; using a GLUE cumulative method to analyze the regional sensitivity of the likelihood values. The method can solve the problem that the prediction accuracy of the model is poor due to incorrect expression of the parameters.

The present invention provides a method for quantitatively evaluating water resource effects of ecological protection and restoration in the river source region. The method comprises the following steps: obtaining soil hydrological characteristic parameters through a prototype ecological hydrological observation test; constructing distributed ecological hydrological simulation of a research area;and finally, according to hydrological characteristic parameters obtained in the preliminary period and the constructed distributed ecological hydrological model, setting scenario plans, comparing theecological hydrological process simulated by each scenario plan with that before the measures are taken, and quantitatively analyzing water resource effects after different ecological protection measures are taken. According to the method provided by the present invention, the problem of applicability of the existing ecological hydrological model in solving the ecological hydrological process simulation in the large-scale, high-cold and high-altitude river source region is solved, and the experimental observation data is directly compared with the model parameters, so that the method can provide a scientific basis for quantitative analysis on water conservation and river runoff effects generated by large-scale ecological protection and restoration measures.

The invention discloses a river runoff prediction method mainly for runoff prediction for PUBs (prediction ungauged basins). The basic principle of the method refers to: using a complex network to mine topological characteristics of a hydrological spatiotemporal sequence, and performs runoff prediction on ungaged basins on such basis; a runoff complex network model is established according to runoff data of a monitoring network station, FN (fast Newman) algorithm is used to perform community mining on such basis, and candidate nodes are selected based on community mining results. The method of the invention considers relevancy between basin division and PUBs, common nodes and characteristic nodes are selected as candidate nodes, and runoff of a station to be predicted is predicted by means of transplantation process. The ungauged basin runoff prediction method considering both relevancy of runoff data topological structures and the runoff data itself is provided herein.

The invention discloses a runoff silt content automatic measuring system, which comprises a sample container, a determining device, a weighing sensor and a controller, wherein the lateral upper part of the sample container is provided with a water inlet; a water pump is arranged on the water inlet; the bottom of the sample container is provided with a water discharging opening; a water discharging valve is arranged on the water discharging opening; the upper end and the lower end of the sample container are respectively provided with a first support frame and a second support frame; the measuring device is arranged at the middle part of the sample container; the upper side of the measuring device is connected with a circular ring through a steel wire; the circular ring is hung and arranged on the first support frame; the weighing sensor is arranged above the circular ring; one end of the weighing sensor is connected with the circular ring through a steel wire; the other end of the weighing sensor is connected with a windlass through a steel wire; the controller is electrically connected with the water pump, the windlass, the weighing sensor, a water discharging valve, a rain quantity meter and a water level meter. The runoff silt content automatic measuring system provided by the invention has the advantages that the processes of manual sampling, filtering, drying and the like are not needed; the silt content in the slope runoff and river runoff can be subjected to real-time automatic monitoring.

The invention discloses a method for preparing production, living and ecological water for an inland river basin in an arid area. The method comprises the following steps of calculating the basic ecological environment water demand of the river, the areas of different ecological protection ranges, the vegetation ecological water demand of different ecological protection ranges, the water demand of different river target ecological environments, the analysis of the river runoff volume on the river target ecological environment water demand and the optimal configuration of the production and living ecological water. On the premise of meeting the total water consumption of the river basin production and domestic surface water, whether the remaining water amount in the past year can meet the basic ecological environment water demand and river loss of a river and the target ecological environment water demand of the river is determined, a scheme of mutually coordinating the production, living and ecological water of the inland river basin in the arid area is provided, and the reasonable configuration and efficient utilization of the water resources are achieved.

The invention discloses a river runoff research method, and relates to the technical field of hydrogeology. The method comprises the following steps: determining an influence factor influencing the actually measured runoff volume of the river; D; determining a research reference period and a change period; E; establishing an influence factor simulation situation route by utilizing a distributed hydrological model and a control variable mathematical method; S; selecting a corresponding hydrological model according to the simulation situation route; D; determining the simulated perpetual averagerunoff volume of the river by utilizing the influence factors and the hydrological model; D; determining the change value of the actually measured runoff volume of the river; D; determining the influence quantity of the influence factor on the river runoff according to the simulated river years of average runoff and the river actual measurement runoff change value; and determining the contribution rate of the influence factors on the actually measured river runoff of the river, wherein the contribution rate is used for judging the influence of each influence factor on the river runoff. By adopting the research method, the influence of climate change and human activities on river runoff can be accurately evaluated, and a scientific basis is provided for reasonable and effective managementof water resources.

The invention discloses a hilly area river base flow series interpolation prolonging method based on a Copula function. The method comprises the following steps: collecting long-series flow data of hydrological stations; calculating a series of river base flows and river runoff flows in representative years; and on the basis of determining an edge probability distribution function of the river base flow rate and the river base flow rate, constructing a joint probability distribution function of the river base flow rate and the river base flow rate, further solving a conditional probability distribution function of the river base flow rate when the river base flow rate is given, and finally performing river base flow rate series interpolation extension in non-representative years. According to the method, the statistical theory basis is high, the nonlinear relation between the river-base flow and the river-base flow can be accurately captured, and the river-base flow and the river-base flow are allowed to obey non-normal distribution. In addition, the river base flow is randomly interpolated and prolonged based on the Copula function, the long-series statistical parameter characteristics of the river base flow can be kept, and the actual characteristics of the river base flow are well reflected.

The invention provides a runoff calculation and prediction method based on a watershed hydrological model. The method comprises the steps: building a watershed hydrological model, and constructing a feature region basic watershed database; dividing hydrological response units according to different characteristic area basic drainage basin data; inputting localized model data, and carrying out related data simulation; determining model parameters of the watershed hydrological model; verifying the correctness of the watershed hydrological model; and inputting meteorological data in the watershed in a future climate scene into the watershed hydrological model, and predicting the river runoff in the hydrological response unit. According to the rainfall runoff and rainfall runoff prediction method, the whole runoff production and confluence process in the drainage basin is considered, the water flow movement process of the whole drainage basin is simulated by inputting climate data, drainage basin data and land utilization data of the drainage basin, and the rainfall runoff and rainfall runoff prediction method can be well applied to simulation of river runoff of the drainage basin and is fast in rainfall runoff calculation and program response.

The invention discloses a river water ecological health monitoring method and a river water ecological health monitoring system, relates to the technical field of ecological health monitoring, and aims to solve the problem that a traditional water quality monitoring method mainly depends on water sample collection and laboratory analysis, and judges the water quality by measuring indexes such as dissolved oxygen, pH value, ammonia nitrogen, total phosphorus, heavy metal and dissolved organic matters in water; the river runoff is calculated from the precipitation and the drainage basin area, and the monitoring points are set in combination with the environmental information, so that an accurate data basis can be provided for subsequent water quality health assessment. The water quality condition is predicted by utilizing the water flow speed and the pollution point discharge amount and then compared with an actual monitoring result, so that potential problems can be found in time and a monitoring strategy can be optimized.

The invention discloses a river organic carbon flux inversion method based on multi-source data and related equipment. The method comprises the following steps: acquiring multi-source data of a river basin range in a target research area; obtaining a normalized difference index based on remote sensing image conversion; river parameters of the target research area are obtained based on the normalized difference water body indexes and multi-source data processing, and river runoff is obtained through conversion of a hydraulic geometrical relationship; on the basis of the remote sensing image, the normalized difference chlorophyll index and the normalized difference turbidity index, the particle organic carbon concentration is obtained through inversion by means of a first inversion model; based on the population number and the rainfall capacity, a second inversion model is used for inversion to obtain the concentration of dissolved organic carbon; and converting the river runoff, the particle organic carbon concentration and the dissolved organic carbon concentration to obtain the river organic carbon flux. The method can significantly improve the accuracy and reliability of monitoring on a high-dynamic river, accurately realizes the inversion of the organic carbon flux of the river, and can be widely applied to the technical field of data processing.

The invention discloses a tidal reach water level and flow relation analysis method based on tidal level harmonic analysis. The method comprises the steps of collecting actually measured water level data, basin river topography and digital elevation data of a tidal reach hydrologic station; characteristic parameters and water surface elevation change characteristics of all partial tides of the tide level of the tidal river reach are obtained on the basis of tide level harmonic analysis, and then independent tide flow and river runoff flow are obtained; establishing a tidal reach one-dimensional hydrodynamic model, and analyzing a flow change process and a water level flow change relation under different water level change scenes; and analyzing the contribution degree of the tidal flow and the river runoff to the actual flow and the change process by utilizing a multivariate regression analysis and drift diameter analysis method to obtain the change characteristics of the water level and flow relationship of the tidal reach. The method has the advantages that the water level and flow relation of the tidal reach can be rapidly analyzed, complex estuary hydrodynamic process simulation is not needed, and the method is also applicable when actually measured flow data is lacked.

The invention provides a water resource optimal allocation method and system, and relates to the technical field of water resource optimal allocation, and the method comprises the steps: firstly obtaining the hydrological historical data of a research area, and then inputting the hydrological historical data into a preset river runoff prediction model, outputting a monthly runoff sequence in a specific year region by the river runoff prediction model; on the basis of the monthly runoff sequence, a multi-condition constraint water resource optimal configuration model based on user distribution of the research area under the extreme climate condition is established; and finally, solving the multi-condition constraint water resource optimal configuration model to obtain a solving result, and carrying out water resource optimal configuration on users in the research area according to the solving result. According to the method, accurate and reasonable optimal allocation of water resources of users under the multi-target constraint condition is effectively realized.

This invention proposes a method and system for optimizing water resource allocation, which relates to the technical field of water resource optimization. The method includes first obtaining historical hydrological data for a study area, then inputting the data into a preset river runoff prediction model, which then outputs a monthly runoff sequence for a specific year within the region. Based on the monthly runoff sequence, a multi-conditional constrained water resource optimization allocation model based on user allocation is established for the study area under extreme climate conditions. Finally, the multi-conditional constrained water resource optimization allocation model is solved to obtain a solution result, and water resource optimization is performed for users in the study area based on the solution result. This invention effectively achieves accurate and reasonable optimal allocation of water resources to users under multi-objective constraints.

The invention discloses a surface water and underground water combined regulation and control method considering runoff and underground water level recovery, and belongs to the technical field of comprehensive regulation and control of water resources. According to drainage basin water resource supply and demand conditions and engineering characteristics, on the basis of fully considering multiple factors such as economy, society and ecology, organic combination of multiple regulation and control measures is implemented, and the method becomes an important way for achieving efficient combined utilization of water resources, restoring the underground water level, improving the regional ecological environment and guaranteeing food safety. Besides, in order to comprehensively evaluate the combined regulation and control effect of the surface water and the underground water, an evaluation index system of the system needs to be established and is used for evaluating the recovery conditions of the river runoff and the underground water level. By quantitatively evaluating actual effects of different regulation and control measures, a decision maker can be helped to judge whether water resource distribution and use are reasonable or not, the regulation and control measures are adjusted and optimized according to evaluation results, an appropriate surface water-underground water combined regulation and control scheme is selected, and reference can be provided for sustainable management of drainage basin water resources.

The invention belongs to the technical field of hydrodynamic models, and provides a river runoff remote sensing measurement method and device, a storage medium and electronic equipment, and the method comprises the steps: constructing a river terrain; constructing a hydrodynamic model based on the river topography, performing simulation optimization on the hydrodynamic model based on historical data until the hydrodynamic model is stable, and determining an optimal parameter combination; matching at least one key parameter for determining the flow at the curve based on the current river channel form; and according to the at least one key parameter and the hydrodynamic model, determining the flow at the curve in the current river channel form. According to the river runoff remote sensing measurement method provided by the embodiment of the invention, the flow at the curve in the current river form can be accurately determined.

The invention discloses a drainage basin main stream dry water annual ecological water transfer method. The method comprises the steps that S1, the river water loss amount, the river loss per unit river length and the river loss rate of each section of a drainage basin source stream and a main stream in the drainage process are calculated through a water balance method; S2, according to a monthly minimum runoff method and a monthly frequency method, the minimum ecological water demand and the river runoff of each typical section are calculated respectively, and a Tennant method is used for calculating result evaluation; S3, based on a phreatic water evaporation model and an area quota method, water amounts required by vegetation growth of different sections are respectively calculated, and a mean value of two calculation results is taken as a vegetation ecological water demand of the sections; and S4, according to the river water loss amount, the river loss per unit river length, the river loss rate, the calculation result evaluation and the vegetation ecological water demand of the section, carrying out ecological water transfer in a low water year and ecological compensation between drainage basins, and converting the ecological benefit of the river water loss by adopting an economic value.

The embodiment of the invention discloses a river ecological water demand calculation system and an information transmission method. The system comprises a river partition monitoring module, an average rainfall prediction module, a river runoff monitoring module, a water depth comparison module, an oxygen capacity monitoring module, a biomass monitoring module, a trace element monitoring module and an intelligent terminal processing system. The river partition monitoring module is divided into a plurality of parameter monitoring areas according to a river geographic structure. The average rainfall prediction module divides a rich water period and a dry water period of the average natural flow for many years according to the rainwater distribution condition for many years, and respectivelycounts the average natural flow for many years in the rich water period and the average natural flow for many years in the dry water period of each parameter monitoring area. According to the scheme,the river is divided into the rich water period and the dry water period, different ecological water requirement calculation modes are selected for the rich water period and the dry water period, large water requirement calculation errors caused by uneven precipitation can be avoided, and the accuracy of ecological water requirement calculation is improved.

The invention relates to a preliminary site selection method of a large dam-type power plant. The method comprises the following steps that river reaches to be developed are screened according to a river runoff minimum limit value suitable for constructing the large dam-type power plant, and major developing river reaches are determined; hypsographic maps of the major developing river reaches are generated according to satellite terrain data, and the original water levels of the major developing river reaches and the mountain top height are obtained; the river reach of which the width of upstream and downstream riverways at the original water level is larger than that of the riverway suitable for constructing the large dam-type power plant, and multiple riverway width minimal value points are selected as dam alternative sites; each dam alternative site adopts a plurality of backwater heights, and one backwater height of each dam alternative site serves as a dam design scheme; dam parameters of all the dam design schemes are determined; the inundated area and the effective reservoir volume of reservoirs in the dam design schemes are determined; the installed capacities and the reservoir volume coefficients of the power plant in the dam design schemes are calculated; all the dam design schemes are output.

The invention discloses a medium and small river hydrological situation change analysis method based on an improved hydrological variation index system, and the method comprises the steps: firstly, carrying out hydrological staging by taking ten days as a calculation scale according to the seasonal characteristics of medium and small river runoff, and dividing a year into a dry period, a previous flood period, a main flood period and a later flood period; then, hydrological parameters in each stage are counted, parameter supplementation is carried out on a conventional hydrological variation index system, and an improved hydrological variation index system is provided; and finally, based on the improved hydrological variation index system, calculating the change degree of the hydrological conditions of the medium and small rivers by adopting a change range evaluation method and a histogram matching method. According to the improved hydrological variation index system provided by the invention, hydrological situation characteristics of medium and small rivers can be comprehensively represented, and the situation that seasonal differences of parameters in different statistical periods are ignored due to the fact that a conventional hydrological variation index system adopts a single statistical scale is avoided.

The invention relates to a river section pollutant concentration prediction and calculation method. The method comprises the following steps: determining a drainage basin and area of a to-be-predicted river section, constructing a model of the drainage basin of the river, and establishing a zero-dimensional water quality model, a one-dimensional steady-state water quality model and a two-dimensional steady-state water quality model used for calling and calculating the concentrations of various pollutants on the basis of Excel software, the river runoff of the to-be-predicted river cross section; and determining the position and pollutant concentration of the initial section of the river, determining whether a sewage draining exit exists between the initial section and the predicted section, and if so, determining the pollutant condition of the sewage draining exit and calling a water quality model to calculate the pollutant concentration of the predicted section. The method can be used for predicting the pollutant concentration of the river and lake section, the time consumption of obtaining the river runoff flow parameters of the water quality model is overcome, different water quality models can be called according to the actual situation of the river, the pollutant concentration of the river section is predicted more accurately. A technical support is provided for scientific decisions of river water environment management and water environment protection.

The invention discloses a dynamic simulation method for recharging groundwater with surface water, comprising the following steps: assembling equipment: connecting a surface water input unit, a groundwater input unit, a discharge unit, a flow monitoring unit, a river simulation unit, a vadose zone simulation unit and a Aquifer Modeling Unit; Groundwater Flow Field Modeling: Controls the connection between the groundwater input unit and the aquifer modelling unit, and the connection between the discharge unit and the aquifer modelling unit to obtain a stable subsurface flow field; Infiltration modelling: Controls the surface water input unit The connection with the river simulation unit and the connection between the discharge unit and the river simulation unit, and obtain the infiltration amount and effective replenishment amount of the vadose zone; infiltration monitoring: the flow monitoring unit monitors the internal and external conditions of the vadose zone simulation unit. The aquifer simulates the moisture content or liquid level in the unit; and realizes dynamic and three-dimensional monitoring of the influence of infiltration moisture on groundwater flow under different river runoff conditions.

The invention belongs to the technical field of water conservancy projects, particularly relates to an anti-erosion protection device for a riverway corner. In order to solve the problem that potential hazards caused by unpredictable flood impact force cannot be fundamentally solved by a conventional flood prevention means for the riverway corner, the invention provides the following scheme that the anti-erosion protection device comprises a concave bank side and a convex bank side, wherein the concave bank side and the convex bank side are both poured with reinforced concrete, the concave bank side comprises a vertical section, an arc section and an anti-scour section, cement bottoms are laid at the positions close to the concave bank side, of the river bottom of the arc section and the river bottom of the vertical section, and an adjusting box internally provided with a cavity and adopting a cuboid structure is fixed to the middle of one side away from the riverway, of the vertical section. An outer box with an opening facing the adjusting box is fixed to the back surface of the adjusting box, and a sliding bearing pedestal is slidably connected to the inner part of the outer box. According to the invention, the riverway can be prevented from being scoured and eroded by great water, and riverway sedimentation is prevented by changing river runoff.

The present invention provides a method for quantitatively evaluating water resource effects of ecological protection and restoration in the river source region. The method comprises the following steps: obtaining soil hydrological characteristic parameters through a prototype ecological hydrological observation test; constructing distributed ecological hydrological simulation of a research area;and finally, according to hydrological characteristic parameters obtained in the preliminary period and the constructed distributed ecological hydrological model, setting scenario plans, comparing theecological hydrological process simulated by each scenario plan with that before the measures are taken, and quantitatively analyzing water resource effects after different ecological protection measures are taken. According to the method provided by the present invention, the problem of applicability of the existing ecological hydrological model in solving the ecological hydrological process simulation in the large-scale, high-cold and high-altitude river source region is solved, and the experimental observation data is directly compared with the model parameters, so that the method can provide a scientific basis for quantitative analysis on water conservation and river runoff effects generated by large-scale ecological protection and restoration measures.

The invention relates to a novel river runoff hydroelectric power station system, which comprises a water power acquisition device and a generator assembly, and the water power acquisition device is connected with the generator assembly through a heavy truck transmission shaft. Compared with the prior art, the method has the advantages that dam building, tunnel digging or immigration are not needed, the construction difficulty and cost are greatly reduced, the construction period is short, and maintenance is convenient; a mature offshore wind power generator assembly and modular design such as a square shaft structure and a resistance wheel disc set are adopted, a dynamic water blocking mechanism and pressure gradient optimization are combined, the energy conversion efficiency is higher than that of a traditional technology, and the generating capacity is large. The method is extremely low in geological condition requirement, environment-friendly, free of river bottom disturbance, capable of reserving fishways, suitable for torrent rivers in the southwest of China and capable of being densely arranged; meanwhile, the tourism industry can be promoted by matching with the riverside road, economical efficiency and ecological benefits are achieved, and large-scale development of green electricity is promoted.

The embodiment of the invention provides a parameter optimization method and system for a river runoff and sediment model. The method specifically comprises the steps of generating a model calculationgrid; collecting an initial field and boundary information of a region to be predicted of a riverway, and forming an information file of the region to be predicted; discretely solving the runoff andsediment model according to the information file of the region to be predicted; adopting a Latin hypercube sampling method LHS to conduct stratified sampling on multiple parameters of the runoff and sediment model in a feasible region, and obtaining multiple parameter groups; based on the combination of model parameters, solving the river runoff and sediment model, obtaining the corresponding likelihood values of each parameter group; setting a likelihood threshold, and deleting the corresponding parameter groups with the likelihood values lower than the preset threshold; sorting the likelihood values corresponding to the remaining parameter groups to determine an uncertainty interval; using a GLUE cumulative method to analyze the regional sensitivity of the likelihood values. The method can solve the problem that the prediction accuracy of the model is poor due to incorrect expression of the parameters.