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| Effects of different land uses and different rainfall intensities on soil and water loss in Northern Fujian Province |
| JIANG Miao-Hua1, 2 , XIE Jin-Sheng1, WANG Wei-Meng3, HUANG Rong-Zhen4, YANG Yu-Cheng1 |
| (1. State Key Laboratory Breeding Base of Humid Subtropical Mountain Ecology, 350007, Fuzhou; 2. Department of Geography,Minjiang University, 350108, Fuzhou; 3. Fujian Soil and Water Conservation Experimental Station, 350003, Fuzhou;4. Department of Ecology & Environment, Nanchang Institute of Technology, 330099,Nanchang: China) |
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Abstract Effects of different land uses and different rainfall intensities on soil and water loss in Northern Fujian were studied based on the observation of runoff plot. The results indicated: 1) Average annual runoff under different land uses were given as following descending order: bare land, Citrus reticulata plantation, Castanea henryi plantation and Cunninghamia lanceolata plantation. Average annual soil loss decreased as the order of bare land, Castanea henryi plantation, Citrus reticulata plantation and Cunninghamia lanceolata plantation. 2) Relationship of runoff and soil loss with the rainfall intensity agreed with the power function. The present study indicated that effects of rainfall intensity on soil loss were greater than runoff. 3) In bare land, soil loss significantly correlated with the maximum 10 minute rainfall intensity (I10). In Castanea henryi plantation, soil loss was most related with the maximum 30 minute rainfall intensity (I30) and the maximum 60 minute rainfall intensity (I60 ). In Citrus reticulata plantation, soil loss was most related with the maximum 30 minute rainfall intensity ( I30 ). In Cunninghamia lanceolata plantation, however, soil loss was almost not affected by rainfall intensity. 4) Runoff in Castanea henryi plantation, Citrus reticulata plantation and bare land had good relationship with the maximum 60 minute rainfall intensity (I60 ) and maximum 30 minute rainfall intensity (I30 ), but runoff in Cunninghamia lanceolata plantation was not affected by rainfall intensity. 5) The relationship between average rainfall intensity (Iave) and soil and water loss under different land use were very week.
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Received: 24 October 2011
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