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| Advance of research on the rainfall simulators for soil erosion |
| Cheng Fei1,Xu Xiangzhou1,2,Gao Jihui1,Xue Yanni1 |
| 1.School of Civil and Hydraulic Engineering,Dalian University of Technology,116023,Dalian;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 Rainfall simulation is widely used for the experimental study on soil and water conservation.This paper reviews the characteristics,application,and prospect of rainfall simulator.The simulators could be divided into two main groups: the non-pressurised rainfall simulators,including the thread droppers and the needle droppers with drop formers primarily made of wool fibres or hypodermic needles,and the pressurised water rainfall simulators,including the spout and the sprayer,of which raindrops sprayed out of a row of spouts on the pipe or a nozzle under pressure.The former could be hardly found at present due to its drawback that the minimum size of drop produced is far larger and more even than most natural rainfall and the simulator could not easily generate rains with the similar energy to the natural one.Rainfall simulation halls with automatic operation and observation systems are booming in these years,but the basic simulators will not be completely replaced in virtue of the cheap price and convenient manipulation.
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Received: 11 June 2007
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