| Cite this article: | 高福,冯棣,孙池涛.农业面源污染指标与地表水质量的相关性研究[J].灌溉排水学报,0,():-. |
| gaofu,fengdi,sunchitao.农业面源污染指标与地表水质量的相关性研究[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 2410Times Download 0Times |
|
|
|
| DOI： |
|
| Correlation Analysis between Agricultural Non-point Source Pollution Index and Surface Water Quality |
|
gaofu1, fengdi1, sunchitao2
|
|
1.Weifang Institute of Science and Technology Agricultural College;2.School of Water and Civil Engineering, Shandong Agricultural University
|
| Abstract: |
| Abstract：【Objective】To reveal the effect of the discharge of major agricultural non-point source pollutants on surface water quality in china, and to provide a theoretical basis for improving the quality of surface water.【Method】 In this study, the changing trend of non-point source pollution index discharge from 1999 to 2018 in China was summarized, and the surface water quality in the same period was quantitatively analyzed using the water quality index (WQI). Finally, the correlationships between agricultural non-point source pollution indicators discharge and their unused amounts and surface water WQI were analyzed.【Result】The chemical oxygen demand (COD), total phosphorus (TP) and ammonium nitrogen (NH4+-N) from livestock and poultry breeding and fertilizer application of four major agricultural non-point source pollution indicators all increased first and then stabilized or decreased in 1999-2018. Compared to 1999, four major pollution indicators in 2018 increased by 37.1%, 21.1%, 28.4% and 15.6%, respectively. River water quality showed a decreasing trend in 1999-2006, and then improved significantly. Compared with the WQI of river water in 1999, which in 2018 increased by 13.8%. Larger inter-annual fluctuations appeared in lake and reservoir water quality in the study duration, and the WQI of two waters in 2018 was higher than that in 1999 by 6.5% and 2.4%, respectively. The unused COD, TP and NH4+-N from livestock and poultry breeding showed a significantly negative correlation with the river WQI, and the TP had the greatest impact on the river WQI, followed by NH4+-N, COD had the least impact.【Conclusion】 In recent years, the river water quality in China had improved, but the water quality of reservoir and lake were still not optimistic. Reducing the fertilizer application and the unused pollutants from livestock and poultry breeding is the key way to improve the quality of surface water. |
| Key words: River water quality; water quality index (WQI); fertilizer application; chemical oxygen demand (COD) |
|
|
|
|
|
|
