9 results about "Watershed scale" patented technology

The invention provides a dynamic grid updating and scheduling method and system for watershed scale ecological restoration. The system comprises a data fusion access module, a dynamic grid generation module and a central cooperative controller. The data fusion access module is used for receiving multi-source heterogeneous data, the dynamic grid generation module is used for constructing an initial watershed grid by adopting a quadtree space division algorithm based on the multi-source heterogeneous data, and the central cooperative controller is used for periodically scanning a full-watershed grid set. Comprehensively judging information value density and updating urgency of each grid according to a multi-dimensional index; by adopting the above technical scheme, the autonomous evolution and precise adaptation of the watershed spatial discretization unit can be realized, the global monitoring breadth and the local description precision are dynamically balanced, and the response sensitivity to an emergent ecological event is improved.

The invention provides a complex watershed short-time flood response intelligent forecasting method based on satellite rainfall perception, and relates to the technical field of hydro-meteorological monitoring and disaster prevention and reduction. The method comprises the following steps: acquiring satellite rainfall data of a target drainage basin observed by a multi-channel satellite, and preprocessing the satellite rainfall data; inputting the preprocessed satellite precipitation data into a short-time precipitation prediction model, and outputting a short-time satellite precipitation prediction result; and inputting the short-time satellite precipitation prediction result into a semi-distributed hydrological model, simulating and generating a flood response process of a watershed scale, and outputting predicted flood process data. According to the method, the precision problem of short-time rainfall prediction of the complex drainage basin is solved, and the timeliness and stability of flood prediction are improved.

The invention discloses a watershed scale ecosystem carbon reserve and carbon flux expression method, which belongs to the technical field of carbon reserve and carbon flux expression methods, and realizes dynamic expression of watershed scale ecosystem carbon reserve and carbon flux by constructing a carbon reserve matrix and a carbon flux matrix and integrating transverse carbon migration and dissolved inorganic carbon flux. The carbon reserve matrix comprises overground and underground biomass carbon reserves of an arbor layer, a shrub layer and a herbaceous layer and carbon reserves of dead standing trees, litters, a soil layer, a wetland and an aquatic ecosystem of each pattern spot in the drainage basin, and calculating the total carbon reserves of each pattern spot and the drainage basin; the carbon flux matrix comprises the carbon reserve variable quantity and the carbon migration flux of each pattern spot carbon library in different time intervals, and the carbon exchange flux, the water body carbon flux and the DIC related flux of the ecological system and the atmosphere at the same time.

The present application relates to a kind of water quantity and water quality automatic regulation and control method, device, storage medium and electronic equipment at watershed scale, the method comprises: constructing watershed SWAT model, the model parameter of watershed SWAT model is verified, obtain the watershed SWAT model after verification, obtain the meteorological data of target region in target period predicted by atmospheric circulation model;The target water quantity and water quality of the target region in the target period are obtained, meteorological data is input into the watershed SWAT model after verification, obtain the water quantity and water quality of target region in target period, the water quantity and water quality regulation and control measure parameter of best management measure in the watershed SWAT model after verification is adjusted using non-dominated sorting genetic method with elite strategy, until the deviation between water quantity and water quality of target period and target water quantity and water quality is within the threshold range for stopping, obtain the water quantity and water quality regulation and control measure of the target region, reduce the artificial cost, improve the efficiency and precision of water quantity and water quality regulation and control.

A kind of multi-system research method for watershed ecosystem service and water and soil resources, it relates to the technical field of watershed ecosystem service, including method one, watershed scale ecosystem service evaluation based on discrete wavelet transform model;Method two, watershed water and soil resource matching calculation combined with information entropy theory;Method three, establish the multi-system coupling coordination model of watershed ecosystem service and water and soil resources.The present application realizes the quantitative expression of the correlation and response relationship of the multi-system of watershed ecosystem service and water and soil resources and the accurate evaluation of watershed scale ecosystem service, and provides a more easy-to-understand and simple operation mode for watershed decision makers.

The present application relates to the technical field of water and soil conservation, and particularly relates to a wind-driven rain erosion risk assessment method for a natural watershed, which precisely identifies wind-driven rain events meeting specific wind speed, rain intensity and wind direction stability conditions by fusing DEM, meteorological and underlying surface data, and breaks through the limitations of traditional vertical rainfall assumption. The wind-driven rain erosion risk index with clear physical meaning is obtained by using the pixel-by-pixel calculation method, comprehensively considering the wind power kinetic energy enhancement, raindrop impact angle and surface roughness effect, constructing the wind-driven rain action intensity and surface sensitivity index, and realizing the risk grade division through the quantile method. The present application does not need complex numerical simulation, and can realize the rapid, quantitative and spatial fine evaluation of the wind-driven rain erosion risk of the watershed scale only by relying on the conventional meteorological data, effectively solves the problems of neglecting spatial heterogeneity, relying on complex models and high cost in the prior art, and provides a reliable basis for watershed water and soil conservation and disaster prevention and control.

The invention relates to the technical field of environmental monitoring and pollution traceability, and discloses a drainage basin scale perfluorinated compound tracing method and system based on artificial intelligence, and the method comprises the steps: integrating multi-source data in a drainage basin, and constructing a drainage basin multi-source data cube with unified space-time granularity; a perfluorinated compound structure is identified through a deep learning model of virtual spectrogram enhancement training, pollutant space-time concentration distribution is simulated in combination with a graph neural network of a physical mechanism, potential emission source contribution is inversed by utilizing attention mechanism back propagation and source feature fingerprint matching, a pollution source contribution thermodynamic diagram and a priority management and control enterprise list are output, and the perfluorinated compound structure is obtained. The core problems that in drainage basin scale perfluorinated compound traceability, joint analysis of multi-source data is difficult, unknown compounds are difficult to recognize, and multi-source superposition contribution cannot be quantified are solved, and support is provided for precise pollution treatment.

The application discloses a watershed system-based pollution collaborative control optimization method and system, relates to the field of watershed environmental management and pollution control, and comprises the following steps: setting a pollutant concentration target of a watershed outlet, and collecting hydrological and water quality data. By analyzing the section relationship of the trunk stream and the branch stream, a contribution coefficient method or a model prediction method is selected according to the linear degree, and a quantitative response relationship between the upstream pollution load and the outlet water quality is established. A multi-objective algorithm is used to obtain an optimal allocation scheme set of the pollution load by taking the fairness of burden reduction and the total quantity efficiency as targets. Based on the scheme characteristics of different water conditions, and the social economy and engineering feasibility, a control scheme and a concentration control target are selected, which give consideration to the fairness and the efficiency. The application realizes precise total nitrogen emission reduction and sea inlet concentration control at the watershed scale, adapts to complex water conditions of large watersheds, solves the problem that the existing control target backstepping method is not applicable to large watersheds, and improves the systematicness and scientificity of total nitrogen pollution treatment of large watersheds.

The application discloses the technical field of environmental governance, and relates to a watershed nitrogen flux local accounting method, which comprises the following steps: delimiting the geographical boundary of a target watershed, and performing analytical matching on the administrative division of the target watershed and the natural watershed of the target watershed; determining a natural subsystem, obtaining dynamic correlation data among the natural subsystems and the main component units of each natural subsystem; constructing a two-way reconciliation mechanism and nitrogen flow connection among the natural subsystems, obtaining nitrogen flow relationship, and obtaining a nitrogen subsystem; establishing a nitrogen material flow model of each nitrogen subsystem; and performing local processing on general parameters in the nitrogen flow model to obtain local parameters. The application can ensure nitrogen mass conservation at the watershed scale, realize matching of emission responsibility and environmental impact, and improve the accuracy of environmental nitrogen emission calculation by constructing a reconcilable cross-border flow network.