Evaluation of groundwater resources in wide inundation areas of the Mekong River basin

So Kazama, Terumichi Hagiwara, Priyantha Ranjan, Masaki Sawamoto

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Severe floods can have disastrous impacts and cause wide ranging destruction in the Mekong River basin. At the same time groundwater resources are significantly influenced and extensively recharged by flood water in inundation areas of the basin. This study determines the variation of groundwater resources caused by flooding over inundated areas located in lower part of the Mekong River basin using numerical modeling and field observations. The inundation calculations have been evaluated using satellite image outputs. Comparing large, medium and small flood events, we conclude that flood control which reduces the area of inundation, results in a reduction of groundwater resources in the area. In 1993, a 19% reduction in inundation areas resulted in a 31% reduction in groundwater storage. In 1998, a 44% reduction in inundation areas led to a 42% reduction in groundwater storage. Thus, while flood control activities are vital to reduce negative flood impacts in the Mekong River basin, they also negatively impact groundwater resources in the area.

Original languageEnglish
Pages (from-to)233-243
Number of pages11
JournalJournal of Hydrology
Volume340
Issue number3-4
DOIs
Publication statusPublished - 2007 Jul 15

Keywords

  • Flood
  • Groundwater resources
  • Monsoon region
  • Recharge

ASJC Scopus subject areas

  • Water Science and Technology

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