Environmental Risk Sources in Drinking Water Source Area of Yangtze River and Quantitative Evaluation of Non-point Source Risks
Using softwares such as eCognition etc.,and combining object-oriented classification with manual interpretation methods,this paper obtained information on the area and spatial distribution of various risk sources in water source area in Gaogang section of the Yangtze River in Taizhou.The results showed that the main types of risk sources in water source areas include industrial land,arable land,forest and grassland,road,water transportation,rural residential land,inland water body and unused land.Risk sources existed in all levels of protected areas.The non-point source risk sources in water source areas mainly consisted of arable land,rural residential land,industrial land,forest and grassland,with a non-point source risk index of 7.1,which belonged to moderate risk hazards.The monitoring and evaluation of risk sources in water source areas based on satellite data can provide powerful data support for early-warning and daily management of water source risk.
drinking water source area of Yangtze Rivernon-point sourcerisk sourcequantitative evaluation
国家科技期刊平台
NSTL
万方数据
