Groundwater Flow and Solute Transport Simulation for Aquifer Management in Comilla Region, Bangladesh
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概要
- 論文の詳細を見る
A number of factors are being constrained the proper development and utilization of groundwater in the Comilla region, Bangladesh. Lowering water table beyond suction limit in the upper aquifer, improper pump-well matching, inaccurate estimation of aquifer recharge and unavailability of aquifer management strategy are some of the constraints. Therefore, field studies on groundwater development were carried out and thereafter groundwater flow and solute transport simulation are done. A two-dimensional finite difference flow model with the superimposed solute transport calculated by the Method of Characteristics (MOC) is used for simulation purpose. Out of the upper unconfined, the main semi-confined and the lower semi-confined aquifers in the region, the main aquifer is modeled by MOC. The annual climate is modeled as a wet recharging period (April to September) and a dry discharging period (October to March). In model calibration, the near-to-optimum values of boundary and initial conditions are found by trial and error which are used for transient flow and solute transport simulation. Transient flow model shows the detailed head distributions and flow pattern of the region. The model estimated recharge is found to be 132 mm, although the atmospheric recharge into the upper aquifer is much higher. The solute transport is only modeled as hypothetical examples. No perceptible movement of the plume is detected during the simulation period. A risk of the main aquifer contamination is low, but the long-term effect must be taken into account.
- 日本雨水資源化システム学会の論文
著者
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Kawachi Toshihiko
Graduate School of Agricultural Science, Kyoto University
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FAZAL M.
Graduate School of Agricultural Science, Kyoto University
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Fazal M.
Graduate School Of Agricultural Science Kyoto University
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Fazal M.
Irrigation And Water Management Division Bangladesh Agricultural Research Institute
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Kawachi T
Graduate School Of Agricultural Science Kyoto University
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Hiramatsu Ken
Graduate School of Agricultural Science, Kyoto University
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Dolezal F.
Department of Engineering Hydrology, University College Galway
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Hiramatsu Ken
Graduate School Of Agricultural Science Kyoto University
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Dolezal F.
Department Of Engineering Hydrology University College Galway
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Kawachi Toshihiko
Graduate School Of Agricultural Kyoto University
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Fazal M.A.
Graduate School of Agricultural Science, Kyoto University
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