琉球石灰岩帯水層における広域地下水流動モデルの構築

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書誌事項

タイトル別名
  • REGIONAL GROUNDWATER FLOW MODEL IN THE RYUKYU LIMESTONE AQUIFER
  • リュウキュウ セッカイガン タイスイソウ ニ オケル コウイキ チカ ミズリュウドウ モデル ノ コウチク

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説明

Groundwater model for understanding and predicting hydraulics and contaminant transport in aquifer make assumptions about the distribution and hydraulic properties of geologic features that may not always apply to karst aquifers. In this study, a finite difference groundwater model (MODFLOW-NWT) was applied to construct an equivalent single layer two-dimensional mathematical model of the Ryukyu limestone aquifer, which is located a southern part of Okinawa main islands. In order to handle problems at regional scale groundwater model in the aquifer, automated parameter estimation method (PEST) was used in this model. Groundwater level measurements collected in 1994 were used to calibrate a steady state model of the study area. This study shows the ability of MODFLOW-NWT and PEST to simulate regional groundwater flow in highly karstified aquifer such as Ryukyu limestone aquifer, which is important for water resource and groundwater management in the area.

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