Calculation method of pollution-holding capacity of small rivers considering the uncertainty of degradation coefficient under the generalization of the center of gravity of pollution sources

Abstract

The invention relates to a method for calculating the pollution-holding capacity of small-scale rivers considering the uncertainty of the degradation coefficient under the generalization of the center of gravity of pollution sources, comprising the following steps: (1) determining the initial section position x of the pollution-holding river section and the number of existing and planned pollution sources n, they are relative to the starting section position x of the reach i , Sewage flow q i , Pollutant concentration c i , to calculate the distance x c ; (2) Measure and determine the position x' of the up-to-standard control section of the pollution-receiving river section, and the pollutant concentration C of the initial section 0 , measure the average flow velocity u of the river section, and the river flow Q; (3) determine the pollutant degradation coefficient k and its uncertainty α of the pollution-holding river section according to the measurement results; (4) calculate the mathematical expectation E( W), as the pollution-holding capacity of the river section; the method of the present invention is advanced and scientific, and the method can effectively estimate the pollution-holding capacity of the river course under the generalization of the center of gravity of the pollution source and the uncertainty of the degradation coefficient, and improve and enhance the management level of the river course water quality .

Description

technical field [0001] The invention relates to a method for calculating the pollution-holding capacity of small rivers considering the uncertainty of degradation coefficient under the generalization of the center of gravity of pollution sources, and belongs to the field of river water quality management. Background technique [0002] The determination of river pollution-holding capacity is an important means of river water quality management. Whether the calculation result of river pollution-holding capacity is correct determines the level of river water quality management and the success of river water protection. In the process of calculating the pollution-holding capacity of river channels, multiple pollution sources are often generalized into a single pollution source at the center of gravity; this generalization method of pollution sources is called the center of gravity generalization of pollution sources. Although the calculation of the pollution-holding capacity of ...

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Problems solved by technology

Although the calculation of the pollution-holding capacity of the river channel under the generalization method of the center of gravity in the past is relatively mature, it does not consider the influence of the uncertainty of the pollutant degradation coefficient on the pollution-holding capacity of the river channel at all, which leads to the deviation of the calculation results of the pollution-holding capacity of the river channel, and gives the river channel Water quality protection work has brought very adverse effects

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