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Influence of flooding on groundwater flow in central Cambodia

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Abstract

Cambodia is affected by flooding from the Mekong, Tonle Sap and Bassac rivers every year, which harms human populations and damages property, as well as alters the water quality in aquifer systems. The objective of this paper is to highlight the effects of river flooding on groundwater flow using numerical simulation. A two-dimensional groundwater flow model coupled with a groundwater recharge model was applied to the research area in central Cambodia. River level variation was included in model processes, and flood areas and periods were assigned. The results showed that during flooding periods, floodwater from the three rivers played an important role in recharging groundwater. During the dry season, Tonle Sap River received groundwater supply from the northwest, and levels in the Bassac and Mekong River dropped to lower than the groundwater level. This study improves understanding of the surface water and groundwater flow system in the study area.

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Acknowledgments

The authors would like to extend their gratitude to the Mekong River Commission (MRC) and JICA, especially Mr. Huon Rath, Mr. Sok Saing Im and Ms. Seng Solady for their generous provision of the data required for this study.

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Authors and Affiliations

  1. Department of Urban and Environmental Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan

    Raksmey May & Kenji Jinno

  2. SG Gijutsu Consultant Co., Ltd, 4-18-25, Kounonishi, Saga City, Japan

    Atsushi Tsutsumi

Authors
  1. Raksmey May
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  2. Kenji Jinno
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  3. Atsushi Tsutsumi
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Correspondence to Raksmey May.

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May, R., Jinno, K. & Tsutsumi, A. Influence of flooding on groundwater flow in central Cambodia. Environ Earth Sci 63, 151–161 (2011). https://doi.org/10.1007/s12665-010-0679-z

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  • DOI: https://doi.org/10.1007/s12665-010-0679-z

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