Review of Risk Assessment of Phosphorus Loss Potential from Agricultural Non-point Source:Phosphorus Index
Review of Risk Assessment of Phosphorus Loss Potential from Agricultural Non-point Source:Phosphorus Index
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发表时间：
2010
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通讯作者：
G. Huai-cheng
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作者：
G. Huai-cheng
农业非点源磷的扩散排放已成为地表水富营养化的主要原因之一，农业非点源污染具有分布广、时空分布不确定等特点，难以控制和防治，识别磷流失的高风险区并采取相应的防治措施是提高控制效率的有效途径.基于GIS的PI是一种简单的风险评估工具，能有效地识别高风险区，本文综述了P指数的关键技术，包括P指数中考虑的P损失因子和PI值计算的修正，并分析了其应用范围和规模。
Diffuse phosphorus discharge from agricultural nonpoint sources has become one of the main causes of eutrophication of surface water.Agricultural NPS pollution can be widely distributed and there is an uncertainty in temporal and spatial distribution,so it is difficult to control and prevent it.Now the valid way to improve the efficiency of control is identifying high risk areas of P loss and then making corresponding measurements. PI based on GIS is a simple risk assessment tool and can identify the high risk areas effectively.This paper reviews the key techniques of P index,including the P loss factors which are taken into account in P indices and modifications of calculation of PI value,and then analyzes the using extent and scale.