Study On Dynamic Change Of Land Use And Soil Erosion Around Taolinkou Reservoir

Taolinkou Reservoir Water Conservation District was selected as the research object, this paper use"3S"technology and TM remote sensing data in different periods(1993,2000,2008), combined with ground surveys and historical data, we interpreted remote sensing images by automatic and visual interpretation methods, and studied on the landscape distribution, land use, soil erosion pattern and dynamics of Taolinkou reservoir in different periods, then obtained the spatial distribution maps of land use types and soil erosion in different periods, analyzed the change of elements in process of time, to complete controll the characteristics of land use and soil erosion before and after the ecological restoration. The results showed that: (1) The area of farmland, grassland and unused land showed a decreasing trend since 1993, but the area of woodland, water, and residential and industrial land showed an increasing trend; Area of different land use types in decreasing order was woodland, water, grassland, farmland, residential and industrial land, unused land.(2) Soil erosion generally showed a downward trend after the first increase, however, changes of soil erosion intensity is varies, mild erosion and moderate erosion Showed first increasing and then decreasing trend, intensity soil erosion area showed a decreasing trend, very intense erosion and severe erosion showed increasing trend.(3) In terms of soil erosion dynamics of different land use types, after ecological restoration, the soil area and the strength both showed decreasing trend; but the soil area and the strength of woodland and residential and industrial land showed increasing trend, further in-depth ecological restoration was needed to weaken the soil erosion strength, and improve the ecological environment.