SOTER-Based Soil Water Erosion Simulation in Hainan IslandEnglish Full Text

ZHAO YUGUO, ZHANG GANLIN and GONG ZITONG 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.

Keywords：

Hainan Island; soil erosion risk assessment; SOTER; USLE;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Agronomy
Classification Code：
S157

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SOTER-Based Soil Water Erosion Simulation in Hainan IslandEnglish Full Text

ZHAO YUGUO, ZHANG GANLIN and GONG ZITONG Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China)

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