碩士 / 國立成功大學 / 海洋科技與事務研究所 / 104 / Coastal and inland aquaculture fisheries flourish in the Pingtung Plain result in groundwater salinization pollution in coastal areas. In the previous studies, the use of groundwater numerical model of groundwater salinization was the most common way, while the researchers did not consider the impact of land subsidence, these models would not be able to accurately predict long-term groundwater salinization, and meanwhile, these models would not be able to accurately assess the effect of various remediation methods, too. MODFLOW groundwater model is used in this study with its sub-modes MT3D to simulate Pingtung coastal area groundwater condition, and consider the change of hydrogeological properties after land subsidence additionally. To quantize the change of hydrogeological properties, the theory of poroelasticity will be used. Via the process of calibration and verification, and different scenarios to predict the salinization, the model which considered the consolidation and the one did not would be analyze.
The remediation strategy can reduce the area of salinization effectively. The model did not considered the consolidation improves the area of salinization is relatively significant due to the value of hydraulic conductivity stay fixed, and there won’t have great change in flow conditions. Meanwhile, the hydraulic conductivity of the model considered the consolidation is gradually become smaller, it means the flow conditions not be so well, and the effect of the remediation is reduced.
The results show that there are great differences between the model considered the consolidation and the one did not. In the prediction of salinization, taking no account of consolidation might underestimate the extent of salinization, therefore, taking into account the impact of land subsidence is essential.
| Identifer | oai:union.ndltd.org:TW/104NCKU5274003 |
| Date | January 2016 |
| Creators | Jung-YenHsu, 徐蓉彥 |
| Contributors | Wei-Cheng Lo, Chung-Ling Chen, 羅偉誠, 陳璋玲 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 112 |
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