Classification of groundwater flow system with subsurface temperature data for the separation of deep low velocity groundwater flow zone

DOI Web Site 62 References
  • YOSHIZAWA Takuya
    Nippon Koei Co., Ltd. Research and Development Center
  • MARUI Atsunao
    Groundwater Research Group, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST)
  • ITO Narimitsu
    NEWJEC Inc.
  • KOSHIGAI Masaru
    Groundwater Research Group, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST)

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Other Title
  • 深部の地下水低流速域の抽出を目的とした地下温度分布による地下水流動場の区分
  • シンブ ノ チカスイ テイリュウソクイキ ノ チュウシュツ オ モクテキ ト シタ チカ オンド ブンプ ニ ヨル チカスイ リュウドウバ ノ クブン

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Abstract

Authors have proposed an approach to evaluate deep groundwater flow separately from shallow groundwater flow, because consideration of different characteristics between deep groundwater flow and shallow one, driving force, data to evaluate the flow and temporal / space scale, is needed for the evaluation of groundwater flow system. This paper describes a methodology to evaluate groundwater flow system quantitatively with subsurface temperature data based on the degree of groundwater flow velocity. A case study is undertaken with groundwater flow and heat transport simulation for Kanto plain. The most fitted case study leads a finding that subsurface aquifer of Kanto plain is classified into upper high groundwater velocity zone and lower low velocity zone. Accordingly, the low groundwater flow zone can be separated from the targeted groundwater flow system by this method.

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