Method for estimating non-point source pollution load of northern plain farmland area based on rainmaking experiments

A non-point source pollution, non-point source technology, used in computing, special data processing applications, instruments, etc., can solve problems such as large errors and unsuitable promotion, and achieve convenient operation, satisfactory simulation accuracy and accuracy, and data requirements. low effect

Inactive Publication Date: 2013-04-03
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

However, the application of existing empirical models mostly adopts the method of literature research to determine the model coefficients, which is highly subjective and has large errors, so it is not suitable for promotion.

Method used

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  • Method for estimating non-point source pollution load of northern plain farmland area based on rainmaking experiments
  • Method for estimating non-point source pollution load of northern plain farmland area based on rainmaking experiments
  • Method for estimating non-point source pollution load of northern plain farmland area based on rainmaking experiments

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Embodiment Construction

[0042] In order to describe the present invention more clearly, the present invention is further illustrated with examples, but they are not used to limit the scope of the present invention.

[0043] A plain area in a northern river basin, with a total area of ​​12,800 km 2 , accounting for 40.76% of the total area of ​​the basin. The terrain of this plain area is flat and the river network is complex, the boundaries of flow generation and confluence are not clear, and the application of traditional mechanism models is limited. In addition, strong human interference activities such as water conservancy project construction, transportation facility construction, and groundwater exploitation have caused great changes in the underlying surface of the watershed, and the simulation accuracy and actual error of the mechanism model are relatively large. Using the method of the present invention to carry out non-point source pollution simulation, its steps are as follows:

[0044] 1) ...

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Abstract

The invention provides a method for estimating the non-point source pollution load of a northern plain farmland area based on rainmaking experiments, and belongs to the field of agricultural non-point source pollution loading capacity estimation. The method mainly comprises the following steps: 1), field scale: carrying out rainmaking simulated experiments, monitoring rainfall capacity, rainfall duration and runoff coefficient, monitoring pollutants of collected runoff water, mastering surface runoff and pollutant output characteristics of a farmland in a research plot, confirming a localized output coefficient, and establishing localized non-point source output characteristic database; and 2), catchment scale: establishing a perfect output model database according to related data, and carrying out non-point source pollution load model estimation. The non-point source pollution loading capacity (including surface generation loading capacity, flowing into river loading capacity and entering into receiving water loading capacity) of the farmland area is calculated according to a formula; and the spatial distribution is analyzed. According to the method, accuracy for non-point source pollution load estimation of the farmland area can be improved, and decision support is provided for non-point source pollution identification and pollution control.

Description

technical field [0001] The invention is a method for estimating non-point source pollution load in farmland area based on artificial rainfall experiments, which belongs to the field of agricultural non-point source pollution load estimation, and can be applied to different rainfall intensities, topography, soil types, fertilization and vegetation coverage conditions , especially in combination with the characteristics of local farmland areas, the non-point source pollution load in farmland areas can be estimated more accurately. Background technique [0002] In recent years, with the development of agriculture and the improvement of human living standards, water pollution and other phenomena have become increasingly serious. With the improvement of point source pollution control capabilities, non-point source environmental pollution has gradually attracted the attention of environmental protection departments in various countries. The seriousness of agricultural non-point s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 刘瑞民陈磊石剑寒沈珍瑶钟雨岑
Owner BEIJING NORMAL UNIVERSITY
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