煙囪式出流口滯洪壩流量歷線特性之探討

The Discharge Hydrographs of Detention Dams with Chimney Outlet

陳正炎(Jen-Yan Chen) ； 陳宗顯(Tsung-Hsien Chen)

《中華水土保持學報》 31卷1期 (2000/03) Pp. 27-36

https://doi.org/10.29417/JCSWC.200003_31(1).0003

摘要

本文旨在針對山坡地滯洪設施中，有關煙囪式出流口之流量歷線做理論與實驗之研究。所用之出流口係採上方矩形下方梯形斷面之煙囪式形狀設計，依據推演之無因次滯洪理論，在入流相關條件已知情況下，再配合不同梯形開口尺度進行渠槽試驗，獲致出流口之流量歷線特性，並提出實驗室模型試驗中有關出流歷線之流量、時間、特徵值及無因次形狀因子等之經驗公式，期爲山坡地開發設置滯洪設施之設計參考。

關鍵字

煙囪式出流口 ； 歷線特徵值 ； 洪峰消減度

並列摘要

The outflow hydrograph of detention dams with chimney outlets in hillslope would be approached by theoretical and experimental analyses. The outlet control section combines upper rectangle with inferior trapezoid. First of all, the dimensionless detention theory would be gathered by the triangular hydrograph. Under the assumption of known inflow hydrograph, the characteristics of outflow hydrograph could be educed by the experiment with several chimney outlets. Also, the experimental equation about discharge, time, characteristic parameters and the dimensionless shape factor of discharge hydrograph could be established. The result of this study can be proposed for the design reference of detention dam in hill slope.

並列關鍵字

chimney outlet ； hydrograph parameters ； peak inflow reduction