Water quality section pollution contribution rate calculation method based on water quality model and pollutant reduction mechanism

Abstract

The invention discloses a water quality section pollution contribution rate calculation method based on a water quality model and a pollutant reduction mechanism. The water quality section pollution contribution rate calculation method comprises the following steps: S1, identifying a pollution source; s2, constructing a one-dimensional water quality model, adding a pollution source into the water quality model, and simulating to obtain the pollutant concentration of each section in the riverway; s3, based on a pollutant reduction mechanism, calculating the reduction amount of pollutants of each pollution source in the river channel operation process; s4, obtaining the reduction quantity of all pollution sources at the water quality section; s5, obtaining the pollutant flux of the pollution source at the water quality section; S6, dividing the total flux of the section by the flux of the pollution source at the section to obtain the pollution contribution of the section. The method has the technical effects and advantages that the one-dimensional water quality model is constructed, and the pollution contribution of the cross section is obtained by dividing the total flux of the cross section by the flux of the cross section of the pollution source, so that the uncertainty caused by the model structure in the aspect of river channel parameter simulation is reduced.

Description

technical field [0001] The invention relates to the technical field of water quality pollution analysis, and more specifically relates to a method for calculating the contribution rate of water quality section pollution based on a water quality model and a pollutant reduction mechanism. Background technique [0002] With the rapid development of modern social economy and the continuous advancement of industrialization and urbanization, the imbalance between the environment and social and economic development has become increasingly prominent, which has become one of the important restrictive factors for the sustainable development of watersheds (Meng Wei, 2007). The Huangshui River Basin is the multi-ethnic area with the most concentrated population in Qinghai Province, and is the political, economic and cultural center of the whole province. But at the same time, the water environment problems in the river basin are becoming more and more prominent, and the water quality of ...

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Problems solved by technology

[0003] At present, the application of the mechanism water quality model is almost all to deal with the water quality change characteristics of the river section by adjusting the parameters, and many parameters appearing in the model are under the complex coupling effect, and often there will be "different parameters with the same effect" in the calibration Phenomenon, resulting in multiple sets of parameter combinations at the same time can meet the accuracy of the final model

However, different parameter groups correspond to different water quality conversion processes. Therefore, it is difficult to measure the contribution of each process to water quality changes through the general likelihood function for parameter calibration. At the same time, the mechanism-based water quality model loses the ability to simulate water quality conversion. The capability of the process, the risk of prediction will also become larger

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