Assessment of groundwater vulnerability in the Yinchuan Plain,Northwest China using OREADIC |
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Authors: | Hui?Qian Email author" target="_blank">Peiyue?LiEmail author Ken?W?F?Howard Chao?Yang Xuedi?Zhang |
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Institution: | (1) School of Environmental Science and Engineering, Chang’an University, 126 Yanta Road, Xi’an, Shaanxi, 710054, China;(2) Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C1A4, Canada; |
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Abstract: | Groundwater vulnerability assessments provide a measure of the sensitivity of groundwater quality to an imposed contaminant
load and are globally recognized as an essential element of all aquifer management and protection plans. In this paper, the
vulnerability of groundwaters underlying the Yinchuan Plain of Northwest China is determined using OREADIC, a GIS-based assessment
tool that incorporates the key characteristics of the universally popular DRASTIC approach to vulnerability assessment but
has been modified to consider important additional hydrogeological factors that are specific to the region. The results show
that areas of high vulnerability are distributed mainly around Qingtongxia City, Wuzhong City, Lingwu City, and Yongning County
and are associated with high rates of aquifer recharge, shallow depths to the water table, and highly permeable aquifer materials.
The presence of elevated NO3− in the high vulnerability areas endorses the OREADIC approach. The vulnerability maps developed in this study have become
valuable tools for environmental planning in the region and will be used for predictive management of the groundwater resource. |
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