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| Principle and method to simulate rainfall with the similar kinetic energy |
| Xue Yanni1,Xu Xiangzhou1,2,Wang Ranran1,Cheng Fei1 |
| 1.School of Civil and Hydraulic Engineering,Dalian University of Technology, 116024,Dalian,Liaoning;2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,712100,Yangling,Shaanxi: China |
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Abstract It is important to offer the kinetic energy equal to that of the natural rainfall in the rainfall simulation.This study analyzes the elements of the rainfall energy including the raindrop diameter,the raindrop impact velocity,and the uniformity of rainfall distribution,and then presents a method to realize the energy similarity by adjusting the rainfall intensity.Nevertheless,the raindrops from pressurised rainfall simulators could attain the terminal velocity over short fall distances less than 10 m if the pressure of the supplied water were high enough.
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Received: 11 June 2007
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