Control division of agricultural non-point source pollution at medium-sized watershed scale in Southeast China |
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Authors: | Jinliang HUANG Huasheng HONG Luoping ZHANG |
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Institution: | (1) Environmental Science Research Center, Xiamen University, Xiamen, 361005, China |
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Abstract: | This paper presents the study carried out for controlling agricultural non-point source pollution (NSP) in a medium-sized
watershed covering 1.47 × 104 km2 in Southeast China using quantitative analysis coupled with geographic information system (GIS), universal soil loss equation
(USLE), soil conservation service-curve number (SCS-CN), nutrient loss equations, and annualized agricultural nonpoint source
model (AnnAGNPS). Based on the quantitative results derived from GIS and environmental models, five control division units
were generated for NSP control in Jiulong River watershed, namely, controlling unit for soil losses, controlling unit for
livestock breeding and soil losses, controlling unit for excessive fertilizer use and livestock breeding, controlling unit
for soil losses and fertilizer use, and controlling unit for excessive fertilizer use and soil losses. This study proved that
integrating GIS with environmental models can be adopted to efficiently evaluate major sources and contributors of NSP, and
identify the critical source areas of NSP, which enables adjusting measures to local conditions by further control division
units developed through such study for control and management of water quality degradation induced by NSP in the Jiulong River
watershed.
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Translated from Research of Environmental Sciences, 2006, 19(4): 119–124 译自: 环境科学研究] |
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Keywords: | agricultural non-point source pollution watershed geographic information system (GIS) control division |
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