Pedosphere 13(2): 139--146, 2003
ISSN 1002-0160/CN 32-1315/P
©2003 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| SOTER-based soil water erosion simulation in hainan island |
| ZHAO Yu-Guo, ZHANG Gan-Lin and GONG Zi-Tong |
| Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China) |
| ABSTRACT |
| The actual and potential water erosion rates of soils with different land covers in Hainan Island, China, were estimated based on the universal soil loss equation (USLE) and a 1:200000 Soils and Terrain Digital Database (SOTER) database, from which soil water erosion factors could be extracted. 92.8% of the whole island had a current erosion rate of lower than 500 t km-2 a-1. Soil erosion risk was considered to be high because of its abundant rainfall. Without vegetation cover, the potential soil erosion rate would be extremely high and 90.8% of the island would have a soil erosion rate higher than 2500 t km-2 a-1. Relative erosion vulnerability of different soil zones, landform types, and lithological regions of the island was compared by introducing a relative erosion hazard parameter a. Cambosols developed from siltstone and mudstone in low hill regions were pinpointed as soils with the highest erosion risk in the island. |
| Key Words: Hainan Island, soil erosion risk assessment, SOTER, USLE |
| Citation: Zhao, Y. G., Zhang, G. L. and Gong, Z. T. 2003. SOTER-based soil water erosion simulation in hainan island. Pedosphere. 13(2): 139-146. |
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