台灣西南部地區上游集水區頻率基準流量之複迴歸分析

The Multiple Regression Analysis of Frequency-based Flow Rate in Upper Watersheds of Southwestern Taiwan Area

呂建華(Cheng-Hua Leu) ； 陳重宏(Jong-Hong Chen) ； 李宏珠(Hong-Chu Lee)

《中華水土保持學報》 30卷2期 (1999/06) Pp. 117-126

https://doi.org/10.29417/JCSWC.199906_30(2).0004

摘要

本文係以數值地形資料爲基本資料，並配合地理資訊系統軟體ARC/INFO、ARCVIEW及相關之應用程式，以求算出各集水區之地文因子值，並在參數均一性之假設下，探討台灣西南部地區不同迴歸年期之頻率基準流量與地文因子間之迴歸方程式。其所得之迴歸式R^2均在0.7以上，此證實複迴歸方法實具有相當之可信度，故其結果或可提供予未設有流量站或水文資料缺乏之集水區設計尖峰流量時參考。

關鍵字

複迴歸 ； 地文因子 ； 頻率基準流量 ； 地理資訊系統

並列摘要

Multiple regression method provides an easy way of predicting the de pendent variables from the knowledge of many other independent variables. Usually, the physiographic factors of a certain watershed respond dynamic features of stream characteristics and they also play important roles in determining runoff hydrograph at watershed outlet. This research employs geographic information system softwares ARC/INFO and ArcView to obtain watershed physiographic factors followed by the use of multiple regression method to find the design runoff peak flow rate for different return periods. The results show that the design peak rate is highly dependent on the selected watershed physiographic factors. Thus, the proposed method can be used to estimate the peak design flow rate for ungauged watersheds.

並列關鍵字

multiple regression ； physiographic factor ； peak flow rate ； Geographic Information System