屏東隘寮圳灌區最佳分水率之探討

The Optimal Water Allocation for Aliliao Irrigation Area, Pingtung

鄭遠(Yum Cheng) ； 李振誥(Cheng-Haw Lee) ； 陳美惠(Mei-Hui Chen) ； 葉信富(Hsin-Fu Yeh)

《農業工程學報》 52卷1期 (2006/03) Pp. 13-23

https://doi.org/10.29974/JTAE.200603.0002

摘要

本研究主要進行隘寮溪隘寮圳灌區地表水與地下水聯合運用，本研究首先透過大尺度的概念，藉由MODFLOW軟體建構大區域屏東平原之地下水水流數值模擬，以求出符合現地水文地質架構與水力參數的模型。另外，採取小尺度的概念，以屏東農田水利會隘寮圳灌區為研究區域，利用MODMAN軟體將地下水流連續性方程式、出水限制、洩降限制作為限制條件模擬出響應矩陣，再利用LINDO軟體解響應矩陣最佳解，並提出最大允許抽水量。將此最大允許抽水量，配合由隘寮圳灌區各主給需水量、渠道損失量、圳路初始流量所建立的各主給平衡方程式及渠道損失方程式，求取最小抽水量並提出最佳分水率之方法。本研究以隘寮圳2003年每旬之取水量為依據，進行最佳化模擬。模擬結果顯示最佳分水率在12/25-5/31期間，分水率的建議為新東勢圳0.48、德協圳0.2、鹽埔圳0.32；在6/1-11/14期間，分水率的建議為新東勢圳0.42、德協圳0.25、鹽埔圳0.33；在11/15-12/24期間，分水率的建議為新東勢圳0.40、德協圳0.25、鹽埔圳0.35。

關鍵字

地表水與地下水聯合運用 ； 線性規劃 ； MODFLOW

並列摘要

In order to conjunct use of surface water and groundwater in Ailiao Irrigation Area, this research plans to divide into two parts. In the first part, the groundwater numerical simulation was built with MODFLOW to construct the hydro-geological structure of regional Pingtung plain. In the second part, the irrigated area of Pingtung irrigation association, Taiwan was adopted to investigate the conjunctive use of surface water and groundwater. Furthermore, several conditions such as the firm water requirement, channel loses, and the initial flow of channel are considered to set up to the balance equation of the firm water, obtained the minimum pumping water amount to evaluate the optimal allocate water rate. Finally, MODMAN and UNDO were used to obtain the best unit plus value and response matrix of allowable pumping water for groundwater resource management.
The optimal simulation result shows the best allocate water rates are 48%, 20%, and 32% for Xin-Dong-Shi, De-Shi, and Yan-Pu during December 25 to May 31, respectively. Meanwhile, the allocated rates are 42%, 25%, 33% for Xin-Dong-Shi, De-Shi, and Yan-Pu during June 1 to November 14, respectively. The allocated rates are 40%, 25%, 35% for Xin-Dong-Shi, De-Shi, and Yan-Pu during November 15 to December 24, respectively.

並列關鍵字

Conjunctive use of surface water and groundwater ； Linear programming ； MODFLOW