Small river pollutant-holding capacity risk estimation method under any planned drain outlet multipoint generalization

Abstract

The invention relates to a small river pollutant-holding capacity risk estimation method under any planned drain outlet multipoint generalization. The method includes the steps: (1) investigating a start section position x of a determined assimilative river, the number n of planned drain outlets in the river and positions of the planned drain outlets in the river, and determining the number n' ofthe drain outlets after generalization and the positions xi of the drain outlets after generalization corresponding to a start section; (2) measuring and determining standard reaching control sectionposition x' of the assimilative river and start section pollutant concentration C0, and measuring mean flow rate u of the river and river flow Q; (3) determining pollutant degradation coefficient k ofthe river and uncertainty alpha of the coefficient according to measuring results; (4) determining pollutant standard reaching concentration Cs of control section according to downstream water standards of the assimilative river, and calculating assimilative capacity risks of the river. The method is advanced and scientific, assimilative capacity risks of a river under any drain outlet planning conditions can be effectively estimated, and the management level of river water quality is improved.

Description

technical field [0001] The invention relates to a method for estimating the risk of a small-scale river channel's pollutant-holding capacity under arbitrary multi-point generalization of planned sewage outlets, and belongs 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 correct determines the level of river water quality management and the success of river water protection. In the process of calculating the sewage-holding capacity of a river, multiple sewage outfalls are often generalized into a single sewage outfall; The calculation does not take into account the uncertainty of the pollutant degradation coefficient and the deviation caused by the estimation of the pollution-holding capacity of the river, and the possible risks caused by it will have a very ad...

AI Technical Summary

Problems solved by technology

In the process of calculating the sewage-holding capacity of a river, multiple sewage outfalls are often generalized into a single sewage outfall; The calculation does not take into account the uncertainty of the pollutant degradation coefficient and the deviation caused by the estimation of the pollution-holding capacity of the river, and the possible risks caused by it will have a very negative impact on the protection of the water quality of the river.

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