台灣中部小型集水區降雨與逕流退水歷線之分析法研究

Analysis Methods of Recession Hydrographs by Different Rainfall Events in Small Watersheds in Central Taiwan

陳信雄(Hsin-Hsiung Chen) ； 王志豪(Chih-Hao Wang) ； 郭芯穎(Shih-Yin Kuo)

《中華林學季刊》 37卷4期 (2004/12) Pp. 407-415

https://doi.org/10.30064/QJCF.200412.0004

摘要

本研究首先定義單場降雨事件為無前期降雨延時與影響基流量之雨量下限，並以此單場降雨事件條件選取蓮華池4、5號試驗集水區1990～1994年以小時降雨量與逕流量資料，利用不同之降雨延時為變因，進行伯恩斯法分析，尋求降雨延時與森林集水區退水係數之相關性，並探討地文因子、植生覆蓋、集水區面積對於退水曲線之影響，期望藉此瞭解森林集水區水文歷線對降雨事件之反應，強調森林集水區於水文循環過程之重要性。

關鍵字

降雨延時 ； 伯恩斯法 ； 退水曲線

並列摘要

Non-rain-periods and minimum rainfall influenced the base flow of watersheds were defined. The rainfall and runoff data of NO.4 and NO.5 experimental watershed in Lien-Hua-Chi were collected hourly since 1990-1994. In this study, Barnes formula was used to analyze the recession curve of hydrographs influenced by each effective precipitation. We tried to find the correlation between recession constant and rainfall duration. We also investigated the effect of physiographic factors such as vegetation cover, geographic factors and watershed sizes. This study would help to understand the hydrograph of forest watershed reacts on rainfall event and would stress the importance of forest watershed on hydrologic cycle.

並列關鍵字

Barnes analysis ； Rainfall duration ； Recession curve