Risk estimation method of pollution-accepting capacity of small-scale rivers under the generalization of the center of gravity of pollution sources

Abstract

The present invention relates to a method for estimating the risk of pollution-holding capacity of small-scale rivers under the generalization of the center of gravity of pollution sources. Initial section position x i and sewage flow q i , Pollutant concentration c i , to determine whether the distribution of pollution sources is suitable for the generalization method of the center of gravity, and if it is suitable for the generalization of the center of gravity, estimate the distance x between the center of gravity of the pollution source and the initial section 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 and river flow Q of the river section; (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 variance D(W ) as the risk estimation of the pollution-holding capacity of the river section. Through the invention, the method can effectively estimate the risk of the pollution-holding capacity of the river under the condition of generalization of the center of gravity of the pollution source, and improve and enhance the management level of the water quality of the river.

Description

technical field [0001] The invention relates to a method for estimating the risk of small-scale river channel pollution-holding capacity under the generalization of the center of gravity of pollution sources, belonging to the field of river channel 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 accurate determines the level of river water quality management and the success of river water protection. In the process of calculating the pollution-carrying capacity of river channels, the pollution sources in planning are often generalized to be in the barycenter section of pollution-carrying river pollution sources; this generalization method of pollution sources is called the barycenter generalization of pollution sources. Although the calculation of the pollution-carrying capacity of the riv...

AI Technical Summary

Problems solved by technology

Although the calculation of the pollution-carrying 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 risk brought by the uncertainty of the pollution-carrying capacity estimation at all, which has brought a very negative impact on the protection and management of the river channel water quality.

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