The estimation of the load of non-point source nitrogen and phosphorus based on observation experiments and export coefficient method in Three Gorges Reservoir Area

1st International Global on Renewable Energy and Development

Tong, X.X.^1 ; Hu, B.^1 ; Xu, W.S.^1 ; Liu, J.G.^1 ; Zhang, P.C.^1

Chang Jiang River Scientific Research Institute (CRSRI), Wuhan

430010, China^1

关键词: Different land use types;    Domestic pollutions;    Export coefficients;    Livestock breeding;    Nitrogen and phosphorus;    Prevention and controls;    Three gorges reservoir area;    Three Gorges Reservoir Area(TGRA);   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/100/1/012181/pdf
DOI  :  10.1088/1755-1315/100/1/012181

来源: IOP

【 摘 要 】

In this paper, Three Gorges Reservoir Area (TGRA) was chosen to be the study area, the export coefficients of different land-use type were calculated through the observation experiments and literature consultation, and then the load of non-point source (NPS) nitrogen and phosphorus of different pollution sources such as farmland pollution sources, decentralized livestock and poultry breeding pollution sources and domestic pollution sources were estimated. The results show as follows: The pollution load of dry land is the main source of farmland pollution. The order of total nitrogen load of different pollution sources from high to low is livestock breeding pollution, domestic pollution, land use pollution, while the order of phosphorus load of different pollution sources from high to low is land use pollution, livestock breeding pollution, domestic pollution, Therefore, reasonable farmland management, effective control methods of dry land fertilization and sewage discharge of livestock breeding are the keys to the prevention and control of NPS nitrogen and phosphorus in TGRA.