Title: Agricultural runoff contaminant discharge in Dianchi Valley agricultural district, China

Authors: Shaoyong Lu, Gang Yu, Pengyi Zhang, Wanpeng Zhu, Meng Gui, Changsheng Xiang

Addresses: Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China; State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China

Abstract: release of pollutants in Agricultural Runoff (AR) from a plastic canopy (PC) region in eastern Dianchi Catchment of China was investigated. The daily variation coefficients of water quantity in 2002 and 2003 were 15.9 and 7.6 respectively. From May 2002 to September 2003, local farmland had discharge of 2.9–3.2 l m² d¹. Pollutant loads from research area to Dianchi Lake from October to April were 10.7 kgTN d¹, 2.91 kgNH₃-N d¹ and 0.18 kgTP d¹. Dissolved Total Phosphorus (DTP) was the major form of TP. PCs changed the pollutant release mode of farmland, and farmland discharge mainly entered groundwater.

Keywords: agricultural runoff; pollutant release mode; pollutant release regularity; plastic canopy; contaminant discharge; China; environmental pollution; farmland discharge; groundwater; water pollution; water quality.

DOI: 10.1504/IJEP.2007.016505

International Journal of Environment and Pollution, 2007 Vol.31 No.3/4, pp.394 - 414

Published online: 03 Jan 2008 *

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