立霧溪流域年平均流量與地文因子關係之研究

A Study on the Relationship between Mean Annual Flow and Physiographic Factors for the Catchments of Li-Wu River

游保杉(PAO-SHAN YU) ； 楊道昌(TAO-CHANG YANG) ； 陳嘉榮(CHIA-JUNG CHEN)

《台灣水利》 41卷3期 (1993/09) Pp. 68-76

https://doi.org/10.6937/TWC.199309_41(3).0004

摘要

在未量測地區，區域頻率分析與區域流量延時曲線爲有效分析工具，可以提供水資源計劃規劃中設計流量訊息。而年平均流量則經常被用來做區域分析的引數。爲提供未量測地區年平均流量估算方法，本文利用立霧溪流域14個集水區爲研究對向，來探討年平均流量與地文因子的關係。從13個地文因子中，主成份分析有效地選取五個地文因子（流域面積，流域平均高程，流域平均地表坡度，河川密度，與河川頻率），與年平均流量建立廻歸關係，發現有很高的相關係數，並經F檢定有顯著相關。

關鍵字

年平均流量 ； 主成份分析 ； 未量測地區

並列摘要

Mean annual flow is commonly used as an index in both regional frequency and flow duration analyses which are useful tools for the design flow in water resource projects at ungauged area. To provide the estimating method for mean annual flow at ungauged area, the relationship between mean annual flow and physiographic factors is studied by using 14 catchments of Li-Wu River. Based on the principal component analysis, five important factors (basin area, mean elevation, mean slope of surface, river density, and stream frequency) are efficiently abstracted from 13 physiographic factors. It is found that the regression has a high correlation coefficient between mean annual flow and five physiographic factors, and a significant correlation exists according to the F-test.

並列關鍵字

Mean annual flow ； Principal component analysis ； Ungauged area