| 水文与水资源 |
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| Calcium Ion Loss along with Runoff on Shrub Slopes in Rock Desertification Area of Northern Guangdong under Rainfall Simulation Experiment |
| WEI Xing-hu1, LU Guan-yao1, ZHOU Hong-yan2, XU Xi-zhen2, LEI Li2 |
| 1.Resources and Environmental Science Research Institute, Foshan University, Foshan 528000, Guangdong, China; 2.School of Geography, South China Normal University, Guangzhou 510631, China |
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Abstract Calcium ion loss volumes with runoff for 30 minutes on shrub slopes in different rock desertification areas in northern Guangdong were observed in a rainfall simulation experiment. Results show that: under different simulated precipitation densities, the variation of runoff, calcium ion concentration and total calcium ion loss with runoff for 30 minutes over shrub slope in different degrees of rock desertification area like an inverted "U" type; under a specific rainfall intensity, the calcium ion loss on shrub slope in potential, slight and extremely severe rock desertification areas are much lower than on moderate and severe rock desertification areas. The calcium ion loss volume along with runoff on shrub slope is closely related with runoff, soil thickness and ratio of exposed rock, among which there is a significant correlation between calcium ion loss and runoff.
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Received: 23 May 2011
Published: 20 September 2011
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2011, Vol. 31 
