流量率定曲線分析方法評估研究－以濁水溪為例

Assessment on Correction Method of Stage-Discharge Relations-Applications in Zhou-Hsui River

許盈松(Yin-Sung Hsu) ； 周湘俊(Hsiang-Chun Chou) ； 楊舒雲(Shu-Yun Yang)

《農業工程學報》 50卷4期 (2004/12) Pp. 62-76

https://doi.org/10.29974/JTAE.200412.0006

摘要

天然河川在指定水文站控制斷面之率定曲線，均由實測的流量及水位定出。率定曲線測定使用後，若河川或水文站斷面情況明顯變動，則率定曲線需重新測定演算；若水位站所在河段存在變化的迴水關係或高度不穩定流，則需對測得的水位流量率定曲線關係加以修定。美國地質調查所之水文觀測手冊所研訂的落差修正分析法及變量流修正分析法廣泛應用於美國地區河川；前揭兩種修正分析法亦載於台灣水利實務單位之觀測手冊中，但對其於台灣河川適用性，則鮮少加以評估。本文以濁水溪流域之彰雲橋水位－流量站為主要水位站，輔以較下游的溪洲橋水位站為輔助水位站，並分別以其實測之長期與象神颱風資料進行前述兩修正分析方法之評估研究。

關鍵字

率定曲線 ； 迴水效應 ； 全洪程測量

並列摘要

The establishment of stage-discharge relations being carried by a stage station database was collected from field measurements. A simple and regular stage-discharge relation was difficult to derive in field where the river discharges are highly variable. Correction estimation of stage-discharge relations was necessarily for many water resources projects. The rating fall constant method and unsteady flow correction method were established by USGS and in popular applied in US. The mentioned two methods were also reported in the code of WRA in Taiwan. While it was few experiences for applications in Taiwan. The mentioned methods are adopted herein to correct and assess stage-discharge relations for two sites on the Zhou-Hsui River. It was found that the regular stage-discharge relation was difficult to derive as long as to correct using the mentioned methods of USGS. It also needs to concern many more factors affecting the stage-discharge relations.

並列關鍵字

Rating curve ； Backwater effect ； Measurements in flood duration