蘭陽溪流域水文分析與降雨逕流模擬

Hydrological Analysis and Rainfall-Runoff Simulation for Langyang River

顏呈益(Chin-Yi Yen) ； 歐陽慧濤(Huei-Tau Ouyang)

《國立宜蘭大學工程學刊》 7期 (2011/12) Pp. 18-29

https://doi.org/10.6176/BCE.2011.07.12

摘要

本研究旨在探討蘭陽溪流域的水文特性與降雨逕流關係，首先針對該流域內的五個雨量站以Horner公式配合交替區塊法，建立各重現期下的雨型分佈，並蒐集該流域的地形與地文資料，以美國陸軍工兵團所發展的HEC-GeoHMS模式分析流域內各子集水區的河川流向、長度、坡度等相關資料。依據各雨量站的地理位置，以徐昇網（Thiessen Polygon）劃分各雨量站所佔權重並據以計算個子集水區的平均雨量，最後則以HEC-HMS模式進行降雨－逕流分析，以探討蘭陽溪流域各集水分區在各重現期下的洪峰流量。研究結果對蘭陽溪流域的水文特性與河川流量變化提供初步的認識。

關鍵字

水文分析 ； 降雨逕流 ； 蘭陽溪 ； 雨型 ； HEC-HMS

並列摘要

This study aims to investigate the hydrological characteristics and rainfall-runoff relation for the Langang River. The rainfall data recorded by the five precipitation gages within the study area was analyzed to construct the design hyetograph by using Horner equation and the Alternative Block method. The geometric data such as river lengths, slopes, and flow direction for each sub-catchments were determined by utilizing HEC-GeoHMS of US Army Corps to analyze the DEM of the study area. The averaged rainfall was obtained by Thiessen Polygon based on the spatial distribution of the precipitation gages. Finally, the rainfall-runoff variations for various return periods were simulated by using HEC-HMS developed US Army Corps. The results provide general insight for the hydrological process in the basin of the Langyang River.

並列關鍵字

Hydrological analysis ； Rainfall-Runoff ； Lanyang River ； Hyetograph ； HEC-HMS