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| Test method of raindrop spectrum using plotting software of computer |
| Shu Ruojie1,3,Gao Jian'en1,2,3,Wu Pute1,2,3,Tian Dong1,2 |
| 1.Northwest Sci-tech University of Agriculture and Forestry;2.Institute of Soil and Water Conservation of Chinese Academy of Sciences and Ministry of Water Resources;3.National Engineering Research Center for Water Saving Irrigation at Yangling: 712100,Yangling,Shannxi China |
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Abstract Raindrop spectrum observation is a key work to research characteristics of natural precipitation and simulated precipitation and design equipment of rainfall simulator precipitation.Combining plotting software of computer with traditional Color-spot method,a new method for raindrop diameter measuring and data processing was probed into.The method decreased the lower limit of measurement from 1.0?mm to 0.2?mm,it(enlarged) the measure range as 10 times as before,and reduced the work quantity largely.The correlation formula between raindrop diameter and Color-plot diameter was educed,whose applicability and advantages were tested.Results showed that the formula would be the best when raindrop spectrum was analyzed by improved Color-spot method.
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Received: 05 September 2005
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