Assessment of shallow groundwater vulnerability in Dahei River Plain based on AHP and DRASTIC |
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Authors: | ZHU Yu-chen ZHANG Yi-long HAO Qi-chen |
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Affiliation: | 1Institute of Hydrogeology and Environmental Geology Chinese Academy of Geosciences, Shijiazhuang 050061, China. |
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Abstract: | Based on the special hydrogeological conditions of the Dahei River Plain in the Inner Mongolia area, assessment of shallow groundwater vulnerability is conducted based on DRASTIC model. Each evaluation indicator weight is determined by using analytic hierarchy process (AHP). The most important indicators are lithology in soil media and vadose zone. Assessment model of shallow groundwater vulnerability of the Dahei River plain is constructed. Distribution map of vulnerability index in this area is made with the spatial analysis function of ARCGIS. The results show that the particularly sensitive area is the piedmont of the Daqing Mountain, where the upstream place of the groundwater and the south-central place of the plain has the lowest vulnerability. The assessment results are more in accordance with the actual vulnerability conditions of this area by using analytic hierarchy process, and is helpful for groundwater protection. |
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Keywords: | Groundwater vulnerability DRASTIC model AHP Dahei River Plain ARCGIS |
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