River section pollutant concentration prediction and calculation method

Abstract

The invention relates to a river section pollutant concentration prediction and calculation method. The method comprises the following steps: determining a drainage basin and area of a to-be-predicted river section, constructing a model of the drainage basin of the river, and establishing a zero-dimensional water quality model, a one-dimensional steady-state water quality model and a two-dimensional steady-state water quality model used for calling and calculating the concentrations of various pollutants on the basis of Excel software, the river runoff of the to-be-predicted river cross section; and determining the position and pollutant concentration of the initial section of the river, determining whether a sewage draining exit exists between the initial section and the predicted section, and if so, determining the pollutant condition of the sewage draining exit and calling a water quality model to calculate the pollutant concentration of the predicted section. The method can be used for predicting the pollutant concentration of the river and lake section, the time consumption of obtaining the river runoff flow parameters of the water quality model is overcome, different water quality models can be called according to the actual situation of the river, the pollutant concentration of the river section is predicted more accurately. A technical support is provided for scientific decisions of river water environment management and water environment protection.

Description

technical field [0001] The invention belongs to the technical field of water environment management, and mainly relates to a method for predicting and calculating the concentration of pollutants in river sections. Background technique [0002] Under the current national conditions, the management of river water environment is one of the difficulties in environmental management in my country. The environmental management departments of various places judge the quality of rivers by setting a certain amount of monitoring points at important sewage outlets and river sections or by manual sampling. water environment quality. However, due to the lag of manual sampling and insufficient coverage of monitoring points, the work of river water environment management has been greatly restricted. Therefore, some scholars at home and abroad use or study the complete mixing model of the river and the one-dimensional water quality model of the river to predict or infer the concentration of ...

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Problems solved by technology

Such a situation will lead to an increase in the difference between the predicted concentration of pollutants in the river section and the actual concentration; at the same time, in practice, there may be sewage outlets along the banks of the river, that is, multiple point source pollution enters the river. It makes a single zero-dimensional or one-dimensional water quality model to predict the concentration of pollutants in the river section and the actual situation is not appropriate

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