頁籤選單縮合
題 名 | 臺灣地區三角形單位歷線參數之研究 |
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作 者 | 黃月娟; | 書刊名 | 農業工程學報 |
卷 期 | 40:1 1994.03[民83.03] |
頁 次 | 頁71-84 |
分類號 | 443.42 |
關鍵詞 | 三角形單位歷線; 基期; 洪峰時間; 洪峰流量; 洪峰稽延; Triangular unit hydrograph; Base time; Time to peak; Peak discharge; Time lag to peak discharge; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究主要探討三角形單位歷線各重要參數(基期Tb,洪峰時間Tp,洪峰流量Qp)與流域地文因子之關係。首先由臺灣地區平均無因次單位歷線推導得Tb=3.277Tp。進而由43個測站之資料分析得Tb、Qp和Tp分別與地文因子之代表性迴歸公式如下: Tb= □= Tp= Qp= 其中,A:流域面積,平方公里 S:流域坡度 Tr:單位降雨延時,小時 □ :洪峰稽延,小時 最後本文探討三種推導合成三角形單位歷線的方法:(1)由Tp和Tb公式推導;(2)由Tp和Qp公式推導;(3)由Tp公式及臺灣地區平均Tb=3.277Tp推導。由43站驗證比較結果顯示1法與2法所得三角形單位歷線完全相同。而1法(或2法)與三法比較之結果各有21站優於對方(較接近測站原有之單位歷線),有1站極為接近。因此,優劣不相上下。建議規劃者可分別採用1法(或2法)和3法兩種方法求三角形單位歷線,再擇一使用 |
英文摘要 | The objective of this paper is relate the parameters of the synthetic triangular unit hydrograph (namely based time Tb, time to peak Tp and peak discharge Qp) to the basin characteristics. First, abased on the average dimensionless unit hydrograph in Taiwan area, it is found that Tb=3.277Tp. Furthermore, the study of 43 watersheds gives the relationships for □, Tp and Qp as follows: □ □ □ □ Where A is basin area, Tr is excess rainfall duration and □ is time lag to peak discharge. Finally, three methods are used to derive the synthetic triangular unit hydrographs of the 43 watersheds. Equations (33) and (3) are used in the first method, equations (3) and (35) in the second method and equations (2) and (3) in the third method. The results show that the unit hydrographs obtained from the first and the second method, respectively, are the same the first (or second) and the third methods have the equivalent performance in agreement with the observed data. Hence, anyone of the proposed methods is suggested to develop the synthetic triangular unit hydrograph. |
本系統中英文摘要資訊取自各篇刊載內容。