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頁籤選單縮合
題 名 | 逕流係數與逕流曲線值及坡度關係之研究=Study on the Relationship among Runoff Coefficient, Curve Number and Slope |
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作 者 | 褚思穎; 謝平城; 林俐玲; | 書刊名 | 水土保持學報 |
卷 期 | 40:3 2008.09[民97.09] |
頁 次 | 頁305-314 |
分類號 | 436.124 |
關鍵詞 | 逕流係數; 逕流曲線值; 坡度; Runoff coefficient; Curve number; Slope; |
語 文 | 中文(Chinese) |
中文摘要 | 目前台灣對於集水區內洪峰逕流量之推估,常採用合理化公式,公式中有關逕流係數之選定,由於水土保持技術規範中逕流係數參考表之訂定範圍過大,且僅以坡度予以分類,常令使用者在選用時感到疑惑。事實上,影響逕流係數之因子繁多且互為因果關係,實非單一簡易之分類表格所能涵蓋。此外,逕流係數直接影響逕流量之推估,對於工程施做規模之決策影響甚鉅,有鑑於此,本研究希望利用台灣地區一些小型試區之實測降雨-逕流數據資料,嘗試找出逕流係數與其主要影響因子間之關係。 本研究經以小型試區之實測降雨及逕流量資料,推估其相對應之SCS逕流曲線值(CN),並將實測之逕流係數C與CN及試區平均坡度Slope作線性迴歸分析,求得以下之迴歸公式: )(0016.0)(0095.020.0SlopeCNC++−= 式中,C:逕流係數 CN:逕流曲線值 (Curve Number) Slope:坡度 (%) 結果顯示逕流係數與坡度呈現正相關之關係,並與土地利用及土壤性質有關之逕流曲線值(CN)亦呈正相關之關係。 |
英文摘要 | At present, the rational formula is often applied to estimate the peak flow of a watershed in Taiwan. The determination of runoff coefficient of the rational formula is usually questionable because the range of runoff coefficient is so big and it is classified by slope as shown in the Technical Regulation for Soil and Water Conservation. Actually, the factors influencing runoff coefficient are various and they affect each other. Runoff coefficient will directly affect peak flow and thus will affect the decision of the engineering construction scale. In view of this, we employ the rainfall and runoff data of some small experiment areas in Taiwan to find the relationship among runoff coefficient and other factors. This research is aimed at estimating the corresponding SCS curve number (CN) to rainfall and runoff data of small experiment areas. Then the relationship among runoff coefficient (C), curve number (CN) and average slope of areas (Slope) is analyzed using linear regression. The regression equation is C=-0.20+0.0095(CN)+0.0016 (Slope) in which, C : runoff coefficient CN: SCS curve number Slope: average slope of small experiment area (%) The result shows that runoff coefficient is related to average slope with positive correlation as well as curve number which describes the characteristics of land use and soil texture. |
本系統中英文摘要資訊取自各篇刊載內容。