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| Comparative experiment of soil infiltration of different land use patterns in loess hilly region |
| Gao Peng1,2,3, Mu Xingmin1,2 |
| 1.The Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources; Northwest Sci-Tech University of Agriculture and Forestry: 712100, Tangling, Shaanxi;2.Graduate School of Chinese Academy of Sciences, 100039, Beijing: China |
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Abstract The soil moisture infiltration process of forest, grassland and farmland in Yan' er-Gou basin has been compared by means of the double-rings method and the rainfall-simulator method respectively. The results show that double-rings method can reflect infiltration process of water to soil, but the rainfall-simulator method can reflect infiltration of rainwater to soil in natural rainfall. The two methods have obvious differences mainly about the variation course of soil moisture infiltration rate. Adopting double-rings method, the soil moisture infiltration rate mainly depends on the physical properties of the soil, while using the rainfall-simulator method, it depends on not only physical properties of the soil but also the rainfall intensity. Under short-time storm simulated , infiltration rates of forest and barren slope grassland have the same tendency that it is more and more higher with the increase of rainfall intensity. Infiltration rate of farmland, however, has the opposite tendency.
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Received: 10 December 2004
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