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| Spatial distribution of rainfall erosivity in Heilongjiang Province |
| Liu Binhui,Liu Yanling |
| College of Forestry,Northeast Forestry University,150040,Harbin,China |
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Abstract The spatial distribution of rainfall erosivity and erosive rainfall in Heilongjiang Province was studied,based on the daily rainfall data of 16 weather stations during the period from 1960 to 2000.Among the 16 weather stations,the average annual erosive rainfall frequency is between 9 and 15 days,and annual rainfall amount above with daily rainfall above erosive threshold is between 192 mm and 387 mm.Average annual rainfall erosivity(R factor) is between 794 and 2 144 MJ·mm/(hm2·h·a).Rainfall erosivity is mainly concentrated in June to September,and reach its highest value at later July or begin of August.The total rainfall erosivity in June to September is about 88% to 95% of annual value.
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Received: 25 June 2008
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