有排水系統之坡地尖峯逕流

Peak Runoff from Slopeland with Drainage System

顏清連(Chin-Lien Yen) ； 鄭元(Yuan Cheng)

《中華水土保持學報》 10卷2期 (1979/12) Pp. 145-154

https://doi.org/10.29417/JCSWC.197912_10(2).0012

摘要

坡地田區逕流，就水流的型態可分爲：漫地流及溝渠流兩大部分。後者又可將其過程分爲第一級序溝流，第二級序溝流，第三級序溝流等水流路徑。當各級序溝以不同的比例長度設計爲坡地排水系統時，坡地出水口的尖峰流量，顯然會有不同的變化。本文基於運動波理論，配合水流路徑完成坡地逕流模式。以該模式計算坡地出口尖峰流量消減函數，將結果繪成無維度函數關係曲線，並與試驗區觀測資料比較，理論與觀測結果雖並未能完全一致，但證實兩者趨勢相同，故可認爲理論函數曲線尚屬合理，更進一步修正後應具實用價值。

並列摘要

Runoff from slopeland area can be divided into overland flow and channel flow. The latter is further subdivided into first order, second order and third order channel flows. As drainage systems for slope land areas are designed with various lengths for each order of channels, different peak runoff discharges will resulf. The present study uses a runoff simulation model constructed previously to obtain peak runoff discharges, under a variety of conditions, from which a relationship between peek runoff and parameters representing the drainage system has been established. Observations have also been carried out in experimental fields to verify the simulated results Although agreement between the obserued and simulated is not really good, they do show the same frend. It is therefore considered that the simulated results are reasonable. Further efforts to improve the simulation model is recommended, however.