河畔取水引致河川滲漏量之研究

Evaluation of Stream Depletion Caused by Pumping

謝壎煌(Hsun-Huang Hsieh) ； 陈忠伟(Jung-Wei Chen) ； 苏清林(Ching-Lin Sue) ； 李振誥(Cheng-Haw Lee)

《農業工程學報》 53卷4期 (2007/12) Pp. 21-34

https://doi.org/10.29974/JTAE.200712.0002

摘要

本研究以彰化快官與貓羅溪河畔爲研究範圍，以MODFLOW與四種解析解進行模式建立與驗證。利用率定後之河畔取水模式，分別對水文地質參數與抽水井型式進行參數敏感性分析，評估各項因子對河川滲漏量之影響。
由水文地質參數敏感性分析顯示，河川型式、河川底部透水係數、水平透水係數和地下水位與河川水位差等四個參數，爲影響模式之重要因子。由數值模式推估含水層出水量進加時，河川滲漏量與地下水位洩降則呈現正相關。由水井型式分析顯示，井徑增加對河川滲漏量影響並不大，但可降低井內地下水位洩降，抽水井與河川距離越大則河川滲漏比小幅度降低。

關鍵字

河畔取水 ； 河川滲漏量 ； MODFLOW

並列摘要

The area of this research is located an intersection in Kuai-guan and Mao-luo Stream. Building and calibration the model of pumping nearby stream were proceeded by MODFLOW and four analytical solutions. The parameter sensitivity analysis of hydro-geological parameters and pumping well types would evaluate the effects on stream depletion caused from each factor.
The hydrogelolgical parameters sensitivity analysis showed that the four parameters including the stream type, the hydraulic conductivity of riverbed, the horizontal hydraulic conductivity of an aquifer and the difference between groundwater and stream level were the important factors. The simulation model showed that when discharge of an aquifer increased, the stream depletion and the drawdown of groundwater table would be increased. The well type analysis showed that the increased well diameter will not influence the stream depletion, but reduce the drawdown of groundwater table in the well. If the longer distance from the pumping well to the stream, then the stream depletion will be smaller.

並列關鍵字

Pumping nearby stream ； Stream depletion ； MODFLOW