Difference and Correlativity Analysis between Automatic and SelfRecording Observation Rainfall
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Abstract:
The data of daily rainfall from 54 weather stations in 2004, 2005, 2007 are used to analyze the difference and correlativity between automatic and selfrecording observation rainfall. Results indicate that the average daily rain amount observed by dual tippingbucket pluviographs is 012 mm less than those by the automatic observation, with the standard deviation of the difference being 093 mm; the average daily rain amount observed by hydroconetype pluviographs is 039 mm less than the automatic observation, with the standard deviation of the difference being 15 mm. The application of the automatic rain sensors has certain influence on the statistical results of rainy days. The daily rain amount observed by the selfrecording observation is obviously linearly related to that by the automatic observation. The correlation coefficient of daily rainfall measurements by the tipping bucket pluviograph and the automatic rain sensor is 0996 and the correlation coefficient of daily rainfall measurements by hydrocone type pluviograph and the automatic rain sensor is 0994. The selfrecording rainfall also is obviously linearly related to the manual observation.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.