Study of multiple-layers groundwater resources management in Chou-Shui alluvial fan

• Main Authors: Ching Chuan Hsu, 許清荃
• Other Authors: Chenh Haw Lee
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/20175096221236358415

碩士 === 國立成功大學 === 資源工程學系 === 88 === In order to investigate the planning and management strategies of the groundwater resource in Chou-Shui alluvial fan, the MODFLOW computer code was firstly applied to simulate the 3-D groundwater flow pattern, hydro-geological structure and in situ hydraulic parameters. The method of response matrix was then adapted to develop management plans. Some data of the hydro-geology, the distribution of wells, the discharge stress, and the change of discharging plan were used to calibrate the groundwater development conditions. Furthermore, MODMAN code was used to obtain the best unit plus value and response matrix. Moreover, the combined simulation-optimization approach is applied to get the groundwater resource management model. Finally several simulation cases on discharge and recharge management models are performed and discussed. Simulation results indicate that the discharge of Chou-Shui alluvial fan must be reduced from 2080 million tons of water each year to 1220 million tons of water each year. The net difference water amount is 140 million tons of water each year. In the management models, six discharge cases and five recharge cases are performed to discuss the best case. Two cases of discharge and recharge are to get the optimal amount for groundwater management. In discharge cases, results in the case A1, A2, A3, A4, A5, A6 show that the optimal amounts are values of 653, 461, 568, 409, 680, 393 million tons, respectively. In recharge cases, results in the case B1, B2, B3, B4, B5 show that the amounts are values of 284, 147, 263, 147, 373 million tons, respectively. We also present the combined cases to understand the couple actions of discharge and recharge. It shows that when the case C1 accompanying with cases A6 and B5 are taken, the optimal amount of discharge of 56 million tons and zero discharge can be considered as an optimum case for managing the current groundwater resource of Chou-Shui alluvial fan.