南勢溪攬勝橋之流量觀測方法的建立

Building a method of discharge measurement Nanshih Creek at Lansheng Bridge

張汶璟(Wen-Ching Cheng)

指導教授 ： 陳彥璋

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00184

摘要

基本流量資料蒐集為科學之研究、水源之管理、水庫之操作以及防洪之設計等之重要依據，亦是水利、水保工程下達決策之重要參考。新店溪青潭自來水水源水質保護區上游之南勢溪為台北縣市民之用水來源之ㄧ，此水源影響民生用水之深，為了掌握南勢溪流域之水源，本研究於南勢溪流域唯一的攬勝橋流量站觀測流量。
常流量使用機械式流速儀與30磅鉛魚進行攬勝橋各測線之流速與水深量測；高流量時期，使用具有懸吊系統之貨車一同垂吊ADP流速儀與高磅數鉛魚量測攬勝橋各測線之流速與水深，量測後兩者皆使用中斷面法計算總流量。
經由長期的水位與流量觀測，最後建立出高可信度之水位-流量率定曲線，使攬勝橋之常流量資料具有即時監測性。
另外利用量測資料建立一高效率的高流量量測方法，藉由平均流速與最大流速有一常數關係，量測最大流速推估平均流速，以及水位-面積關係推估通水斷面積，將兩者乘積後可於短時間取得高流量資料，即可大幅降低量測人員暴露危險環境之風險。
建立便利的流量觀測方法，即是增廣流量資料之取得，未來新增水利設施或水利相關建設時，經由準確資流量資料的依據，亦可發揮任何工程之最大經濟效益。

關鍵字

流量 ； 測量 ； 平均/最大流速比 ； 機率

並列摘要

The discharge measurement is foundation of scientific research, water resource management and reservoir operation. The Nanshih creek is major supply water source in the Taipei urban. Hence, the research was measured discharge in Nanshih creek at Lansheng Bridge.
In the duration of normal discharge, the Price AA was used for discharge measurement. In the duration of flood stages, the ADP was used. Both measurement have water depth and flow velocity. The discharge was calculated by Mid-Section Method. Through the extended measurement work, those established high validity and realizable stage-discharge rating curve in normal discharge duration.
The measurement data can support further application. Through the relationship of maximum velocity and mean velocity can reduce staffs exposed in the dangerous environment. Also, it can make discharge measurement more efficiently in the flood duration.
The validity and realizable discharge data could improved construction cost. The easy discharge measurement method means more data can collected in the same time.

並列關鍵字

measurement ； discharge ； flow ； stage-discharge rating curve

參考文獻

[27] 楊孝忠，杜普勒流速儀在高流量觀測上之應用，碩士論文，國立台北科技大學土木防災研究所，台北，2006。

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