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| Effect of different land use types on runoff on gentle slopes:A case study in the loess hilly area, China |
| JIN Ting1, 2 , DIAO Wen-Wu1, 2 , DIAO Meng-Ru1, 2 , XU Hai-Yan2, 3 |
| (1.State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University, 100875, Beijing;2.College of Resources Science and Technology, Beijing Normal University, 100875, Beijing;3.College of Economic and Urban Management, Shandong University of Finance and Economics, 250014, Jinan: China) |
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Abstract Study on the action mechanism between land use types and soil erosion on gentle slopes is of significance on controlling water and soil erosion in the loess hilly area. Based on the study in research plots (from 2009 to 2011) at Ansai Integrated Experimental Station of the Chinese Academy of Sciences,effects of different land use types on runoff on gentle slope were discussed. Five land use types were selected, including millet field(F), switchgrass field(S), abandoned land(A), two-thirds millet and one-third switchgrass field(FS), two-thirds millet and one-third abandoned land(FA). The results showed that: 1) Compared with the other four land use types(S, A, FS, FA), runoff produced in millet field (F) was the most, and runoff was affected with high rainfall intensity significantly. 2) In the whole observation period, July was the sensitive time of producing runoff. 3) Compared with millet field (F),other four land use types(S, A, FS, FA) had positive effects on runoff reduction to different extent, and rank of the effect was A>S>FA>FS. 4) For the five land use types(F, S, A, FS, FA), increase of vegetation coverage was beneficial to runoff ruduction but the effect could be weakened when rainfall and rainfall intensity were large.
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Received: 18 January 2012
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