Application of MT3DMS and geographic information system to evaluation of groundwater contamination in the sherwood sandstone aquifer, UK

Zhang, Han, Xu, Wen Lai and Hiscock, Kevin M. ORCID: https://orcid.org/0000-0003-4505-1496 (2013) Application of MT3DMS and geographic information system to evaluation of groundwater contamination in the sherwood sandstone aquifer, UK. Water, Air, and Soil Pollution, 224 (2). ISSN 0049-6979

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Abstract

Groundwater quality usually correlated with different land use types. As Britain's second largest aquifer, the Sherwood Sandstone is confronted by the threat of high nitrate concentrations caused by intensive agricultural activities. The aim of this study is to estimate nitrogen loss on the aquifer outcrop and to predict nitrate concentration in groundwater in the future appropriately. GIS was used in the study for spatial analysis of land use data, pre-processing nitrate inputs for a groundwater model. An export coefficient model was adopted to help estimation of nitrogen losses in the study area. A groundwater flow and mass transport model was constructed and calibrated to groundwater level in 45 monitoring points and nitration concentration in 22 public supply boreholes, respectively. Then, the calibrated model was used to predict nitrate concentrations in groundwater boreholes to explore nitrate trend in the future under current land use mode and agricultural practice. The simulative results show that even if some moderate mitigation methods are adopted, nitrate concentrations in boreholes would increase in the future (before eventually decreasing) and fail to meet water quality standards (50 mg NO3/L). The nitrate concentration would reach 73 mg L-1 in selected borehole by December 2025 unless more radical changes in land use were adopted. It is concluded that a time scale of several decades may be considered for the sandstone aquifer in the context of nutrient management and nitrate mitigation in order to achieve improvements in water quality.

Item Type: Article
Additional Information: Funding Information: Acknowledgments The authors wish to thank the University of East Anglia and the “Free Exploration Foundation” of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection for their financial support of this study. We are also grateful to Richard Winstanley of Severn-Trent Water for the provision of water supply and groundwater quality data.
Uncontrolled Keywords: export coefficient,groundwater modeling,groundwater pullution,land use,nitrate,environmental engineering,environmental chemistry,ecological modelling,water science and technology,pollution,sdg 15 - life on land ,/dk/atira/pure/subjectarea/asjc/2300/2305
Faculty \ School: Faculty of Science > School of Environmental Sciences
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Depositing User: LivePure Connector
Date Deposited: 11 Oct 2022 10:31
Last Modified: 24 Oct 2022 07:33
URI: https://ueaeprints.uea.ac.uk/id/eprint/88949
DOI: 10.1007/s11270-013-1438-z

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