陡坡渠流之特性為水流之含氣現象,其流 況自上游往下游為漸變的,本研究應用許等 (1990)之量測原理及分析探討 n=0.0188之流況。配 合許等(1990)之量測結果推估流況與水理參數間 之相互關係。更應用標準步推法並配合白水起 始點發生位置與水體斷面含氣率經驗公式,可 求得陡坡含氣流之有效水深及特性水深。同 時,利用統計方法與亂流擴散理論推求氣泡均 勻流段含氣率於垂直底床方向之分布曲線。 The flow characteristic of open channel chute flow is the aerated phenomenon during its downward course. Application of Hsu's (1990) method for measuring air concentration at Manning's coefficient n=0 .0188 determines an empirical formula which relates the depth averaged air concentration to flow parameters. The empirical formulae together with the step method are utilized for practical applications. The analytical vertical distribution of the air concentration, which are described by two different transport characters, are in good agreement to the experimental data.
關聯:
第六屆水利工程研討會論文集(上冊)=Proceedings of 6th Conference on Hydraulic Engineering，頁251-261
