蓮華池地區24小時降雨型態特性及設計雨型歷線

Storm Pattern Characteristics and Design Storm Distribution of 24-hour Duration at the Lienhuachih Area of Central Taiwan

盧惠生(Hui-Sheng Lu)

《台灣林業科學》 12卷4期 (1997/12) Pp. 481-489

https://doi.org/10.7075/TJFS.199712.0481

摘要

台灣上游集水區以水文模式推估流量歷線，往往欠缺降雨歷線，無法有效的應用，本研究乃以台灣中部地區蓮華池氣象站雨量資料，分析降雨型態特性，並建立設計雨型歷線。獲悉蓮華池24小時降雨歷線型態為中峰型雨型，最大雨峰時間在15小時處，最大雨峰降雨比率為19%。又採用Huff法、分配法及位序法等三種方法推求24小時降雨延時之設計雨型歷線，經誤差分析，顯示位序法推求24小時降雨延時之設計雨型歷線最佳。同時以位序法之設計雨型歷線，建立指數型經驗推估式。

關鍵字

集水區 ； 降雨型態 ； 降雨歷線 ； 設計雨型歷線

並列摘要

It is difficult to estimate stormflow hydrographs with hydrologic simulation models for upstream watersheds of Taiwan due to lack of hyetographs. In this study, analyses of storm pattern characteristics and establishment of design storm distribution were carried out with rainfall records of the Lienhuachih weather station at the Shuilichi upstream watershed of central Taiwan. The results showed that hyetographs of 24-h duration at Lienhuachih were mostly middle peak type of storm pattern with 15-h time to rainfall peak and 19% rainfall peak ratio. The design storm distributions of 24-h duration were also established by using Huff's, allocation, and ranking methods. Based on error analyses, the ranking method showed good results for solving the design storm distribution of 24-h duration at this area. Meanwhile, the empirical equations of exponential type to estimate design storm distribution of 24-h duration were established from the data of ranking method.

並列關鍵字

watershed ； storm pattern ； hyetograph ； design storm distribution