| Summary: | 碩士 === 中原大學 === 土木工程研究所 === 89 === Due to the uneven rainfall distribution in Taiwan, water resources have to be supplemented by drawing underground water in many places. In some areas, the over-drawing of groundwater has resulted in a drop of the ground water table and its storage. The aim of this study is to investigate effectiveness of artificial recharge methods to recharge the groundwater. The methods compared are the artificial recharge basin and ASR well.
In this study, three-dimensional groundwater flow model, MODFLOW, developed by USGS is applied to model the recharge effect using different recharge methods. First, a virtual site is set up for artificial recharge basin method. Then based on the surface slope, hydraulic conductivity, area of the recharge basin and groundwater level, the infiltration and recharge effects are compared.
In ASR well method, this study uses MODFLOW together with MT3DMS, a three-dimensional transportation model to investigate the recharge and drawing of groundwater of the contaminated water layer. Simulation results show that ASR well is very effective in contaminated water layer. The ASR well can recharge and store plenty of clean water in the contaminated water layer in the wet season, and this stored water can be pumped up for consumption in dry season.
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