[Research on dissolved nitrogen and phosphorus loading model based on GIS].
In order to research the origin of nonpoint source pollution dissolved nitrogen (DN) and dissolved phosphorus (DP), some artificial rainfall experiments was made at Guanting Reservoir. The experimental data show that the correlation between transporting rate of DN (DP) and the runoff is very good, with the average correlation coefficient 0.9978 and 0.9889 for DN and DP respectively. Therefore, a new load model of DN(DP) is put forward. While applying it, we studied the spatial distribution of DN (DP) pollution load according to the digital elevation model (DEM) and the information obtained from land use map and soil map. Its results show that DN mainly originated from irrigable land first, mound and hill second.
Ma
Yan-tao
YT
Department of Environmental Engineering, College of Resource & Environmental Science, Wuhan University, Wuhan 430072, China.
Xue
Jin-feng
JF
Liang
Tao
T
Xia
Jun
J
Zhang
Xiu-mei
XM
D040362:Geographic Information Systems; D008962:Models, Theoretical; D009584:Nitrogen / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D011891:Rain; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis
D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen