Analysis of land use/cover change and its driving factors in Shiyang river basin in the early 21 century

Using RS and GIS technique and based on three TM images of Shiyang river basin from 2000 to 2008,the land use/cover database at three times was established.In combination with the socio-economic statistics and the meteorological observation data,the dynamical trend of LUCC and the driving forces of study areas in eight years were analyzed.The result showed that:noticeable changes in land use/cover change(LUCC)occurred in Shiyang river basin in recent ten years,and mainly in anthropic zone of plain area of central basin.There was a slowly increasing tendency in area of forestland,water and urban.The area of farmland was ascended in prophase and was descended in anaphase,but it kept a increasing tendency in the mass as the it increased by 158.33 km2 from 2000 to 2008.The grassland area had been respectively decreased in the period of 2000-2005,and enlarged between 2005 and 2008.During the two periods the unused land remarkably decreased.The impact of demographic factors,economic factors and policy factors were more significant to the land-use change in a short time scale.