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Cross-Medium Control of Water and Soil Environmental Pollution in Watershed
Xinghui Xia, Yuansheng Pei, Shaokui Zheng, Ruimin Liu, Wu Wen, Gongqin Wang, Zhifeng Yang
Strategic Study of CAE ›› 2022, Vol. 24 ›› Issue (5) : 49-55.
PDF(1232 KB)
PDF(1232 KB)
Cross-Medium Control of Water and Soil Environmental Pollution in Watershed
Pollutants have complex source-sink relationships in water and soil environments at a catchment scale, and the transformation of pollutants in water and soil environments is primarily controlled by various water-soil interface processes. Therefore, the control of water and soil environmental pollution should consider water and soil environments as a whole, identify the real pollution source through cross-medium attribution analysis, and then control the pollution with cross-medium treatment. We first analyze the crossmedium migration processes of pollutants and the major influencing factors. Then we propose the principle and key process of crossmedium regulation, namely, cross-medium attribution identification and cross-medium treatment of water and soil environmental pollution. Moreover, we expound the important role of the processes of the following interfaces in cross-medium removal of pollutants: soil-water and slope-channel interfaces outside river channels, as well as water-sediment and water-suspended particulate matter interfaces in river channels (including water-solid interfaces in the riverbed and lateral shore hyporheic zones). Furthermore, cross-medium control of non-point source pollutants in watershed, cross-medium removal of nitrogen-containing compounds from rivers, and cross-medium removal of nitrogen and phosphorus from lakes are illustrated with practical cases. The research results can provide a scientific basis for the control and treatment of water and soil pollution.
watershed / water and soil pollution control / water and soil environment / water-sediment interface / water environment quality / cross-medium treatment
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