Method for estimating nonpoint source pollution load of village adjacent to river

Abstract

The invention relates to a method for estimating the nonpoint source pollution load of a village adjacent to a river. The method comprises the following steps: 1) basic information collection, in which average rainfalls R1, R2 and R3 of years of accumulation for light rain, moderate rain and heavy rain to rainstorm in a certain place, village area A and other basic situations are acquired; 2) field detection, in which, every runoff coefficient, runoff duration and runoff yield area of rainfall duration, rainfall capacity and rainfall runoff of an effective rainfall number are detected, and chemical oxygen demand, total nitrogen and total phosphorus of a collected water sample are detected; and 3) nonpoint source pollution load model estimation, in which, the annual pollution loads of chemical oxygen demand, total nitrogen and total phosphorus of nonpoint source pollutants of the village by the river are calculated by adopting a formula. The calculation method provided by the inventionhas more guidance significance, and is convenient to develop related control and management measures.

Description

technical field [0001] The invention belongs to the field of estimating agricultural non-point source pollution loads, and in particular relates to a method for determining non-point source pollution loads in Linhe villages. Background technique [0002] In recent years, as people pay more attention to environmental problems, a kind of environmental pollution problems that are very common and not familiar to people have gradually been paid great attention to by the environmental protection departments of governments in various countries. This is non-point source pollution. Some domestic literature or It is also called non-point source pollution in the media, and it is usually called "non-point source pollution" in more formal and academic literature. [0003] Compared with point source pollution, non-point source pollution originates in scattered and diverse areas, and its geographical boundaries and occurrence locations are difficult to identify and determine. It has strong...

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Problems solved by technology

The disadvantage is that it has high requirements for data and personnel, and the whole model is relatively complicated; and in view of the lack of laying of drainage pipe networks in villages in my country, the conditions for applying this type of model are extremely unsatisfactory

[0031] At present, rural life pollution investigations have been carried out in the Taihu Lake, Dianchi Lake, Three Gorges and other watersheds, but they are limited to the estimation of potential pollution loads based on the investigation results. On a small scale such as Linhe villages, there is no systematic calculation formula for non- Calculation of Point Source Pollution Load

Unable to account for non-point source pollution loads at the village scale, which limits current research

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