2 results about "Watershed scale" patented technology

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.