Method for measuring and calculating load capacity of agricultural pollution source entering water body based on standard data

Abstract

The invention discloses a standard data-based agricultural pollution source in-water body load measuring and calculating method. The method comprises the following steps: acquiring rainfall, water quality, DEM, land utilization, soil texture, soil type and social economic data of a to-be-researched region; according to the hydrological data of the to-be-studied region, dividing the to-be-studied region into a plurality of drainage basin partitions; calculating a pollutant influence factor of each drainage basin partition; carrying out standardization treatment on the pollutant influence factors of each drainage basin subregion; calculating a water inlet body coefficient of each drainage basin partition according to the pollutant influence factors after standardization treatment; obtaining the discharge amount of agricultural source pollutants in the to-be-studied region, and calculating the water-entering load amount of the agricultural source pollutants; and selecting a specific drainage basin partition, and verifying the water inlet body load capacity obtained by calculation and an actual measurement result. The method can solve the problem that the prior art lacks a method for effectively calculating the load capacity of pollutants in a large-scale region in the water body, and is good in consistency, reliable in calculation and large in range.

Description

technical field [0001] The invention relates to the technical field of hydrology and water resources, in particular to a method for measuring and calculating the load of agricultural pollution sources into water bodies based on standard data. Background technique [0002] With the rapid development of agricultural production, the amount of chemical fertilizers, pesticides, and livestock and poultry manure used in crop cultivation has increased significantly, which has aggravated agricultural non-point source pollution. Pollutants enter nearby water bodies through surface runoff, drainage ditches, and underground seepage. And then cause water pollution, agricultural non-point source pollution is currently the main source of water environmental pollutants. [0003] Quantifying non-point source pollution in the watershed to determine the key pollution control areas, and then accurately controlling and treating non-point source pollution is the main way for water environment gov...

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Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a load of agricultural pollution sources into the water body based on standard data that can solve the problem in the prior art that it is difficult to effectively calculate the load of pollutants entering the water body in a large-scale area Calculation method

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