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題名 | 滯洪壩不同形狀開口之水理因子探討=Hydraulic Characteristics of Different Openings for Detention Dam |
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作 者 | 黃宏斌; 朱世文; | 書刊名 | 臺灣水利 |
卷期 | 47:4=188 1999.12[民88.12] |
頁次 | 頁26-31 |
分類號 | 443.92 |
關鍵詞 | 滯洪壩; 矩形開口; 圓形開口; Detention dam; Rectangular opening; Orifice opening; |
語文 | 中文(Chinese) |
中文摘要 | 目前一般常見之滯洪壩開口形式有矩形開口及圓形開口兩種,但由於兩者之水理 特性並不相同,所達到之滯洪效益也有所差別。本研究是以模擬演算方式,由假設集水區資 料及配合波爾斯演算法得到不同開口型式及開口大小下之出流歷線,並得到下列主要結論; 滯洪壩對洪峰到達時間之遲滯比洪峰量之削減影響較難應用於減洪設計。將不同開口型式之 滯洪壩做水位高與底面積關係圖,再配合代表出流洪峰流量之曲線時則可以得到相同底面積 之最小蓄水體積之設計。在洪峰量以及入、出流洪峰流量比值相同時,圓形開口滯洪壩所需 之蓄水體積會比矩形開口者來得小。 |
英文摘要 | There are two types of opening, rectangular and orifice openings, used frequently in detention dam recently. The hydraulic characteristics of these two openings are different so that those effects on flood detention are not the same. This study used Puls Method simulating a watershed to get series of outflow hydrographs on different openings, opening sizes and location areas. And, the principal results were got as followings. The effect of elongating time lag of arriving time of peak flow of detention dam could not easily used in flood-mitigation design but curtail the flood discharge. Drawing the relationship of water depth and location area for different openings, associated with restricted outflow discharge, would get the smallest designed storage volume of detention dam. As the same flood volume as well as the ratio of inflow and outflow, the storage volume of orific opening would be smaller than that of rectangular one. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。