Evaluation on Risk of Non-Point Source Pollution in Dayanghe Watershed Based on GIS
Auteur(s): |
An Ning Suo
Hua Ru Wang Yuan Bin Fu |
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Médium: | papier de conférence |
Langue(s): | anglais |
Conférence: | 2012 International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2012), August 10-12th 2012, Zhangjiajie (China) |
Publié dans: | Sustainable Cities Development and Environment [3 vols] |
Page(s): | 2023-2026 |
DOI: | 10.4028/www.scientific.net/AMM.209-211.2023 |
Abstrait: |
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. |
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sur cette fiche - Reference-ID
10327373 - Publié(e) le:
24.07.2019 - Modifié(e) le:
24.07.2019