輻射井設施應用於曾文水庫淤泥取水試驗研究

Utilization of RadialCollector Well Facilities onReservoir Silt Setting for Tsengwen Reservoir as an Example

謝博涵(Po-Han Shan)

指導教授 ： 丁澈士

國立屏東科技大學/工學院/土木工程系所/碩士(2014年)

https://doi.org/10.6346/NPUST.2014.00273

摘要

臺灣屬於海島型國家，流域面積狹小，流速湍急，且流量豐枯懸殊，由於降雨時間及空間分布不均，坡陡流急，降雨迅速形成逕流流入大海，無法蓄存水源。曾文水庫為臺灣最大之一，因經歷過1999年921地震與2009年八八水災後，使大量土砂崩塌或沖蝕入庫，使得其淤積問題格外嚴重。本研究利用室內水工模型砂箱，模擬單層單管型式與單層多管型式之輻射井，埋設於曾文水庫底積淤泥取水，並與埋設於標準砂型式之出水量做比較，選取最佳取水之型式。
本研究係利用供水水文地質手冊之輻射井型式驗證取水量，藉由室內水工模型砂箱埋設輻射管模組，進行水庫淤泥下取水，並利用抽水井量測方式，取得實際值，並與公式設計集水量之值比較。輻射井計算公式中，洩降s值與滲透係數K值為靈敏值，係影響集水量之重要參數。經研究發現，水庫淤泥用於兩種輻射井型式之出水量，單層單管型式與水位高之最大出水量為：砂厚0.1公尺之出水量為34.4CMD。單層多管型式與水位高之最大出水量為：砂厚0.3公尺之出水量為38.8CMD。單層單管型式取水較為單層多管型式穩定，兩者之取水量大同小異，故單層單管型式為本研究較佳之取水型式。

關鍵字

水工試驗 ； 輻射井 ； 出水量

並列摘要

Taiwan has abundant precipitation under a sub-tropical climate, and more than 90% of total annual precipitation occurs during the wet season in Southern Taiwan. The hydrological characteristics of the plain are unique with short. As a result, it takes only a few hours from upstream rainfall to downstream runoff. Therefore, reservoir for the water resources storage has been recognized for more flexible utilization.The Tsengwen Reservoir is the largest capacity in Taiwan. The experienced geological reformation from the Earthquake 921 and Flood disaster 88, mountainous soil have become loose, making its silting problem is particularly serious.The study is therefore to use radial collector well facilities and to take groundwater from the reservoir silt sitting. This type of radiation collector well designed from the hydrogeological manual by the validation. By means of hydraulic sand boxes model laying indoor radiant tube modules under silt in the reservoir water and measurement of pumping wells, real value, and formula design of catchment value comparison have been approved by comparing the designed formula. Well radiation formula, the drawdown and the permeability coefficient K and S value are sensitive to the value of, the Department of the important parameters affecting the catchment. From test analysis, the maximum water discharge intake from reservoir silt for two types of radiation wells, viz: single layer with single-tube type with level of the water and single layer with multi-tube type with level of the water separately. The maximum water discharge with 0.1m thick of sand is 34.4CMD using a single layer with single-tube type with level of the water; The maximum water discharge with 0.3m thick of sand is 34.4CMD using a single layer with multi-tube type with level of the water. The stable intake facilities using single-tube is suggested for practical use.

並列關鍵字

Reservoir Silt Setting ； Radial collector well ； water discharge

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