Soil Carbon and Nutrient Changes Under Soil Erosion and GIS-Based Simulation

摘要

After models of soil carbon and nutrient change, and soil erosion have been constructed, soil carbon and nutrient changes under soil erosion in each land unit of Wangjiaqiao watershed have been simulated and forecasted, which are based on IDRISIW GIS. The results of simulation showed that different element of soil nutrient (C, N, P, K) has different soil acceptable erosive modulus in different land use types, which means that one kind of soil element will decrease when soil acceptable erosive modulus is higher than the limited value.