地表水與地下水灌區水資源聯合運用之研究：以屏東隘寮圳灌區為例

Conjunctive Use of Surface and Ground Water in Irrigation Area:A Case Study for Ailiao Irrigation Area, Pingtung

鄭遠(Yum Cheng) ； 陳美惠(Mei-Hui Chen) ； 王裕民(Yu-Min Wang) ； 李振誥(Cheng-Haw Lee)

《農業工程學報》 49卷4期 (2003/12) Pp. 73-82

摘要

為了探討如何有效利用現有的水資源，本研究選擇屏東農田水利會隘寮圳灌溉區為研究區域，以線性規劃理論為基礎，研究在滿足灌溉需水條件下之最佳地表水與地下水的水量分配。研究中並分析最佳分水率、計畫分水率及實際分水率情況下，枯豐水期抽水量與剩餘地表水量，進而探討可移用水量與其價值。
本研究以隘寮圳十年旬平均取水量為依據進行最佳化模擬。由模擬結果顯示最佳分水率與實際分水率比較於枯水期有明顯的差異，以最佳分水率分水時的最小抽水量為每年19.558百萬立方公尺且其剩餘水量為每年35.747百萬立方公尺。若將取水量增至接近水權量並與實際分水率比較，於枯水期約可節省60%的電力費，若將減抽之地下水量與剩餘水量合併，則在枯水期可移用之水資源為每年26.081百萬立方公尺。若考慮氣候異常將取水量降低至0.7倍十年旬平均取水量，模擬結果亦均較實際分水率的現況良好，顯示最佳分水率在灌溉管理的重要性。

關鍵字

地下水/地面水聯合運用 ； 灌溉 ； 線性規劃 ； 最佳化

並列摘要

The purpose of this study is to investigate how to effectively utilize the available water resources. The service area of Ailiao irrigation canal of the Farm Irrigation Association of Pingtung was chosen as the study area of this research. Linear programming is applied for the optimization on conjunctive use of surface and ground water. Besides, this research also analyzes the amount of water to be pumped and excess surface water under the condition of optimized, planned, and existing water allocation rate during the period of dry and wet season. Furthermore, the amount of transferable water and its value are also discussed in the study.
Last ten years’ average intake water records from Ailiao irrigation canal were used as input data for simulation. The results show that the optimized water allocation rate is significantly different from the existing one in dry season. The minimized volume of ground water required in the study area is 19.558 million M3 yearly and under the condition of optimized water allocation rate, the excess surface water is 35.747 million M3 per year.
From the results of this study, approximately about 60% of electricity cost for water pumping will be saved and there are 26.081 million M3 of water could be transferred to domestic or industrial water use when surface intake water is close to the volume of water right during dry season.

並列關鍵字

Surface/ground water conjunctive use ； Irrigation ； Linear programming ； Optimization model