以集水廊道及滲透牆開發水資源與供水潛能評估之數值模擬

The study of filtering out the cloudiest water by gallery vicinity

黃乾育(Chian-Yu Huang)

指導教授 ： 張德鑫

中原大學/工學院/土木工程研究所/碩士(2007年)

https://doi.org/10.6840/cycu200700123

摘要

由於台灣地區降雨量在時間及空間上分佈不均，且地面水利用受到差異甚大的豐枯流量所限制，水源涵養不易，因此水資源開發除了川流水源外，多仰賴水庫及地下水供給。
近年因桃園停水引發了石門水庫高濁度原水問題，以及為因應未來發展及減輕地下水超抽影響，如何妥善規劃地面水與地下水體之運用，為水資源利用上重要課題。本研究應用地下水水流FEMWATER數值模擬模式，推算集水廊道內流量及地下水水位變化之情形利用，並評估其供水潛能，以適度增加川流水源地區之地下水開發。
本文假設一虛擬河道，模擬當設置滲透牆與集水廊道後其地下水流之變化情形，並推估此廊道供水潛力及對附近地下水及地面水之影響，進而探討設置集水廊道的可行性。模擬結果顯示，當回填濾料或滲透牆K值愈大，則其出水量也愈大。本文並討論當滲透係數K值因泥沙阻塞量而降低後，滲透量、累積滲透量以及集水效率的變化，以供參考。

關鍵字

廊道

並列摘要

Water resource relies on reservoir and is supplied by underground water beside develops the water from river, because the rainfall distributes which isn’t averagely for timing and space in Taiwan area, the using of ground water is limited by the unstable flow to be not easily for developing fountainhead.
The water supply was suspended in Taoyuan recently to account the discussion of the muddy water problem of Shihmen Reservior. For handling the development in the future and reduce the influence of underground water over extracted. How to formulate the application of ground and underground water properly is the main issue for using of water resource.
This research uses underground FEMEATER computation program to calculate the situation of the gathering channel flow and the change of underground water mark, and survey the potential of water supply then increase the development of underground water in wellhead area.
This research makes a watercourse as a hypothesis to approximate the underground water situation while set up Diosmosed wall and gathering gallery then to treat the feasibility of gathering galley installation.
The conclusion shows the quantity of outlet becomes bigger while filter bed or K value of diosmosed wall is bigger. The research also discusses the change of diosmosed quantity, accumulated diosmosed quantity and the efficiency of gathering after diosmosed K value decreased because of blockaded-silt to offer the worth of reference.

並列關鍵字

gallery

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