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摘要:
The estimation of peak discharge from a catchment due to intense rainfall is a difficult task that may occur in a return period. If cannot be estimated accurately, it may lead to serious problem in hydraulic structure design like bridge, culvert across a river and drainage system. The main parameter which affects the peak flow is runoff coefficient of the catchment which directly depends on the soil type, its slope and land use pattern with vegetation covers. For the purpose, this study was carried out to estimate maximum runoff coefficients for different land profiles and soil types in hill slope model developed in 10 degree with the horizontal to the rainfall simulator rig (Basic Hydrology system-S12) experimentally which can give more reliable value than the real field test method as it is easier than field test especially in hill slope. The soil slope preparation was made of sand, silt and clay separately and the experiments were carried out in a controlled system. The slope prepared represented a small catchment on a plot of 2.02 meter length, 1 meter wide and 0.15 m depth soil plots (at the slope of 10° to the horizontal plane). From the experiment in different soil plots, the rainfall runoff coefficients were observed as 0.428 - 0.53 for sand soil slope, 0.46 - 0.55 for silt soil slope and 0.42 - 0.51 for clay soil slope under uniform rainfall rate of 4 lpm to 13 lpm in each soil slope. Rainfall runoff correlation equation was found with the values of R above 90% in each soil slope. The value observed is within the range of rational value of 0.05 to 0.95 as standard which concluded that the performance of simulator was found good to deal with rational values. And the runoff coefficients for these soil types can be taken within the range obtained to estimate peak discharge in any small catchment area depending on the soil types.
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篇名 Experimental Study of Runoff Coefficients for Different Hill Slope Soil Profiles
来源期刊 土木工程期刊(英文) 学科 医学
关键词 RAINFALL RUNOFF COEFFICIENTS SOIL Type HILL SLOPE SOIL Profiles
年,卷(期) 2019,(2) 所属期刊栏目
研究方向 页码范围 157-171
页数 15页 分类号 R73
字数 语种
DOI
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RAINFALL
RUNOFF
COEFFICIENTS
SOIL
Type
HILL
SLOPE
SOIL
Profiles
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
土木工程期刊(英文)
季刊
2164-3164
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
289
总下载数(次)
1
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0
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