Combined Impacts of Land Use and Climate Change in the Modeling of Future Groundwater Vulnerability
Publication: Journal of Hydrologic Engineering
Volume 22, Issue 7
Abstract
Groundwater vulnerability assessment delineating areas that are susceptible to contamination from future scenarios has aroused worldwide attention. In this study, the authors (1) estimate future groundwater vulnerability in Hunan province, China, under urban-related land-use change and climate change scenarios; and (2) analyze the importance of related parameters to future groundwater vulnerability. The DRASTIC model [including seven parameters: depth to water table (D), net recharge (R), aquifer type (A), soil type (S), topography (T), impact of vadose zone (I) and conductivity (C)] together with an extra parameter, land-use patterns, was used to generate the map of groundwater vulnerability in future scenarios. The results indicated that vulnerability classes had an increasing trend from low to high vulnerability in the future scenarios. Hunan province may face high groundwater pollution risk in the future. The sensitivity analysis indicated that the depth-to-water table may be the dominant factor, and the land-use pattern was the most sensitive parameter on the predicted future groundwater vulnerability in Hunan province. Decision makers should identify the potential future groundwater vulnerability and take early steps to protect groundwater resources.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (51521006, 51479072, 51579094, and 51679082), the Program for Changjiang Scholars and Innovative Research Team in University (IRT-13R17), and China Meteorological Data Sharing Service System.
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Published In
Journal of Hydrologic Engineering
Volume 22 • Issue 7 • July 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Feb 21, 2016
Accepted: Oct 17, 2016
Published ahead of print: Mar 9, 2017
Published online: Mar 10, 2017
Published in print: Jul 1, 2017
Discussion open until: Aug 10, 2017
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