Evaluation on risk of non-point source pollution in Dayanghe watershed based on GIS

被引：0
|
作者：
Suo, Anning [1 ]
Wang, Huaru
Fu, Yuanbin [1 ]
机构：
[1] Natl Marine Environm Monitoring Ctr, Dalian 116023, Peoples R China
来源：
SUSTAINABLE CITIES DEVELOPMENT AND ENVIRONMENT, PTS 1-3 | 2012年 / 209-211卷
关键词：
watershed; non-point source; pollution; risk evaluation; GIS;
D O I：
10.4028/www.scientific.net/AMM.209-211.2023
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Four indices which include surface runoff, soil erosion, agricultural nutrient loss, human and animal feces were selected and method to evaluate risk of non-point source pollution in watershed was constructed based on GIS. As a case, non-point source pollution in Dayanghe was evaluated. Results showed that very high risk area of non-point source pollution accounted for 3.41% area of the watershed, mainly located in farmland with steep slope along upper valley of the watershed. High risk area of non-point source pollution was located in farmland and human settlement placecs, accounted for 16.40% area of the watershed. Areas with low risk of non-point source pollution was riverbeds, shrub and grassland in eastern and western hilly with steep slope. Areas with lower risk of non-point source pollution located in middle of the watershed and accounted for 60.55% area. GIS-based risk evaluation system of non-point source pollution can reflect real map of pollution in the Dayanghe watershed and give implication for protection plan.
引用
收藏
页码：2023 / 2026
页数：4
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