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[1]LIU Zheng-jia,LIU Zhan-ren,WANG Si-si,et al.Spatiotemporal Variation of Rrainfall Erosivity in Yimeng Mountainous Area Based on Daily Rainfall[J].Research of Soil and Water Conservation,2012,19(02):34-37.

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Spatiotemporal Variation of Rrainfall Erosivity in Yimeng Mountainous Area Based on Daily Rainfall

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 02 Page number: 34-37 Column: Public date: 2012-04-20

Title:: Spatiotemporal Variation of Rrainfall Erosivity in Yimeng Mountainous Area Based on Daily Rainfall

Author(s):: LIU Zheng-jia^1,2, LIU Zhan-ren², WANG Si-si³, YU Xing-xiu²; 1. College of Population, Resources and Environment, Shandong Normal University, Ji’nan 250014, China;
2. Shandong Province Key Laboratory of Soil & Water Conservation and Environment Protection/Institute of Soil & Water Conservation and Environment Protection, Linyi University, Linyi, Shandong 276005, China;
3. Department of Geography and Resources Management,the Chinese University of Hong Kong, Hongkong, China

Keywords:: daily rainfall; rainfall erosivity; Yimeng mountainous area; spatiotemporal variation

CLC:: S157.1

DOI:: -

Abstract:: Rainfall erosivity is the most important external driving force of soil and water loss,and it is the key field of the soil erosion.In order to estimate rainfall erosivity accurately and analyze the spatial distribution and temporal change of rainfall erosivity,a monthly rainfall erosivity model was adopted to calculate the rainfall erosivity in Yimeng mountainous area by using daily rainfall data from 38 stations during 1971—2008.The results show that the spatial distribution of R value in Yimeng mountainous area is higher in the northwest and south central,but lower in north.Sishui County and east area of Qufu City is the high value in the study area.The interannual variability trend of R value is the same as the trend annual rainfall and aggressive rainfall,but there are also some abnormal years.Rainfall erosivity in Yimeng mountain area is distributed mainly from June to September,accounting for 97.07% of all year.The highest R value appears in July,accounting for 51% of the annual rainfall erosivity.The result could provide theoretical basis for forecast of the soil and water loss and agricultural non-point source pollution condition.

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