FRN-CSSI joint traceability tracing analysis method for agricultural non-point source pollution in river basin

Abstract

The invention provides an FRN-CSSI (Fallout Radionuclides Compound-Specific Stable Isotope) joint traceability tracing analysis method for agricultural non-point source pollution in a river basin, which comprises the following steps: (1) sample collection of an FRN tracing and CSSI traceability technology; (2) sample analysis of the FRN tracing and CSSI traceability technology; (3) calculation ofthe sediment transport rates of different land use types / vegetation types in a river basin; (4) calculation of the contribution proportions of sediment sources of different vegetation types; and (5) analysis of sediment and its pollutant sources. By adopting the FRN and CSSI joint traceability technology, the land-use source of sediment pollutants in a river basin and the load flux of the input water system can be quantitatively understood, and the key control areas of soil erosion and pollution in the river basin can be quantitatively identified and divided according to the soil erosion sediment yield rate and land use area of different land use types.

Description

technical field [0001] The invention belongs to the technical field of pollution monitoring, and in particular relates to a FRN-CSSI combined source tracing analysis method for agricultural non-point source pollution in a watershed. Background technique [0002] Rainfall runoff causes agricultural source substances (sediment, nitrogen, phosphorus, pesticides, etc.) to be transported to surface water systems, which has become the most important contribution to non-point source pollution in rivers, lakes, and reservoirs around the world, and is also threatening the water quality of river basins. In order to effectively prevent and control the sediment pollution load imported into rivers, lakes and reservoirs, it is necessary to first identify the source of sediment pollution and clarify the path of pollutants entering the water body. Traditional non-point pollution source analysis methods, such as geochemical fingerprinting, biological fingerprinting, SWAT and other model anal...

AI Technical Summary

Problems solved by technology

At present, scholars at home and abroad usually use FRN tracing and CSSI tracing separately. It is difficult to quantitatively analyze the source types of sediment pollutants in rivers, lakes, and reservoirs, and cannot explain the transport process of sediments and pollutants carried by erosion in river basins and the relationship between water pollution loads. Source-sink relationship

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