A GIS-Based Study of the Pollution Load of Adsorbed Nitrogen and Phosphorus in Jialing River Basin, P. R. China
LONG Tian-yu,LIU La-mei,LI Chong-ming,LI Ji-cheng
DOI:10.11835/j.issn.1674-4764.2008.03.026
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2008,Pages -
- Abstract
Some reasonable and suitable methods for factor calculation of the equation were chosen based on the American Universal Soil Loss equation,the characteristics of the Jialing River basin in P.R.China,and related research results.The soil erosion and loss in each hydrological unit of the basin were estimated using GIS.Employing the non-point source adsorbed nutrition load model,the loads of adsorbed nitrogen and phosphorus pollution were calculated and analyzed.The results show that the average sediment transportation module in the Jialing River Basin in recent years is 161.94 t/(km2a),and the loads of adsorbed nitrogen and phosphorus pollution are 29 620.8 t/a and 1 391.96 t/a,respectively,at the watershed outlet(Beibei hydrologic station).Adsorbed nitrogen and phosphorus pollution are serious in the Bailong River and Xihanshui basins.The descending order of land type with adsorbed nitrogen and phosphorus loss modulus is as follows: wild land,bush,turf,field,city and forest.