An improved export coefficient model to estimate non-point source phosphorus pollution risks under complex precipitation and terrain conditions.

Environmental Science and Pollution Research International
Xian ChengYongcai Jing

Abstract

To control non-point source (NPS) pollution, it is important to estimate NPS pollution exports and identify sources of pollution. Precipitation and terrain have large impacts on the export and transport of NPS pollutants. We established an improved export coefficient model (IECM) to estimate the amount of agricultural and rural NPS total phosphorus (TP) exported from the Luanhe River Basin (LRB) in northern China. The TP concentrations of rivers from 35 selected catchments in the LRB were used to test the model's explanation capacity and accuracy. The simulation results showed that, in 2013, the average TP export was 57.20 t at the catchment scale. The mean TP export intensity in the LRB was 289.40 kg/km2, which was much higher than those of other basins in China. In the LRB topographic regions, the TP export intensity was the highest in the south Yanshan Mountains and was followed by the plain area, the north Yanshan Mountains, and the Bashang Plateau. Among the three pollution categories, the contribution ratios to TP export were, from high to low, the rural population (59.44%), livestock husbandry (22.24%), and land-use types (18.32%). Among all ten pollution sources, the contribution ratios from the rural population (59.44%...Continue Reading

References

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Citations

Mar 2, 2019·Environmental Science and Pollution Research International·Xian ChengRanhao Sun
Aug 20, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Qiyu LianDaniel Dianchen Gang
Feb 6, 2020·Environmental Monitoring and Assessment·Maoqing DuanYang Ding
Jan 16, 2020·Environmental Science and Pollution Research International·Shuhe RuanWeijia Wen
Aug 16, 2021·Environmental Science and Pollution Research International·Lilin ZouYansui Liu

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