碩士 / 國立成功大學 / 資源工程學系碩博士班 / 90 / ABSTRACT
The hydro-geological structure model in Chou-Shui alluvial fan is established to investigate the issues for safety yield and seawater intrusion for water quality from 1995 to 2000 year. The MODFLOW computer code was applied to simulate the 3-D groundwater flow pattern and to validate in situ hydraulic parameters for Chou-Shui alluvial fan. The safe yield is computed by Hill method. A certain processes also estimate the safe yield related to the suitable water table. Furthermore, the MT3D computer code transport model with considering the suitable water table is applied to evaluate the seawater intrusion in the Chou-Shui alluvial fan.
Simulation results indicate that as the discharge of Chou-Shui alluvial fan is reduced from 2080 × 106 tons per year to 1250 × 106 tons per year, both the measured water table and the predicted water table are closed. The averaged safe yield of Chou-Shui alluvial fan was 1,229 × 106 tons per year from 1995 to 2000 years. The results also show that the suitable water table is lower than the observed water table at the top fan whose area can be pumped groundwater amount. On the other hand, the suitable water table is higher than the observed water table at the last fan whose area needs to recharge/replenish the groundwater amount.
The contamination areas of Chou-Shui alluvial fan defined by using the index of the TDS is agreed with those defined by using the index of the ratio of CL/HCO3 . The variation of the concentration wasn’t substantially changed between 1999 and 2000 years. As considering the suitable water table to simulate the concentration of TDS and the ratio of CL/HCO3 after 5 and 10 years, results show that they are significantly reduced at the top and middle fan while slightly reduced the last fan.
| Identifer | oai:union.ndltd.org:TW/090NCKU5397027 |
| Date | January 2002 |
| Creators | Jung-Wei Chen, 陳忠偉 |
| Contributors | Cheng-Haw Lee, 李振誥 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 267 |
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