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- W2392005322 abstract "Based on the monthly precipitation data of Beijing region from 1724 to 2009,this paper calculated the annual statistical characteristics by mathematical statistical methods.The annual mean precipitation is 601.8 mm,with the mean square error is 196.7mm.Also the maximum is 1406mm(1959) and the minimum is 242 mm(1869).The mumber of years of Flood,partial flood,normal,partial drought and drought are 23,28,172,58 and 5a respectively.The correlation coefficient of annual rainfall and rainfall in the four quarters is 0.055,0.456,0.942 and 0.177.The years statistics shows a downward trend of the proportion of rainfall in 6-8 months of a year.Also,the linear regression results showed that the precipitation in Beijing area showed a general downward trend with the rate of decrease 0.89mm/a within the nearly 100 years.By autocorrelation analysis,series of rainfall is relatively independent.The Q-Q graph analyzing and K-S testing result showed that the rainfall in Beijing obeys the normal distribution when the confidence level is 90%,but within 95% confidence level which is not normally distributed." @default.
- W2392005322 created "2016-06-24" @default.
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- W2392005322 date "2011-01-01" @default.
- W2392005322 modified "2023-09-26" @default.
- W2392005322 title "Change characteristics of precipitation in Beijing region from 1724 to 2009" @default.
- W2392005322 hasPublicationYear "2011" @default.
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