d use change and its iimpact on surface runoff in the main city of Xi'an
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Abstract:
Abstract: The land use change caused by the urbanization in Xi’an will affect the rainfall- runoff. In order to explore the effect, in this paper with the help of ARCGIS spatial analysis tools, SCS model was applied to study the rainfall-runoff process of the main city in Xi’an. The results showed that the high value area in CN value was gradually expanding. At the same antecedent soil moisture degree , runoff increased with increasing rainfall. According to processing of land use data of 1995, 2000, 2006 and 2010, matrix of land use for the three periods was obtained. It could be concluded that the area of urban construction land which has the strong ability in runoff gradually expanded. In contrast, the area of farmland and woodland gradually decreased. The rapid development of urbanization led to the changes in land use types, which caused runoff increase in the main city of Xi'an.
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