2008•Journal of Subtropical Resources and EnvironmentRequires access
Non-point Source Pollution Simulation in Xixi Watershed with SWAT Model
Kun Rong
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Abstract
The SWAT model was applied to stimulating the transport of nitrogen and phosphorous in Xixi watershed within the Jinjiang River Basin.Calibrated by comparing the observed ammonia-nitrogen and mineral phosphorous with the simulated results,it was found that the Ens of ammonia-nitrogen and mineral phosphorous reached 0.69 and 0.79 with the minimum relative error 5.3% and 1.4%,respectively.The simulated results also showed that the annual TN pollution from non-point source was 1 530 t,or 6.3 kg/hm2 and the annual TP pollution from non-point source was 270 t,or 1.1 kg/hm2 during 1973 and 1979 in the watershed.Farmlands in the study area were major source of non-point source pollution.The spatial distribution of the pollution is uneven in the sub-watersheds,particularly the situation in Lanxi sub-watershed was more serious.