咸阳市土地利用变化及生态风险

基于1990年与2007年2期土地利用遥感数据,采用RS,GIS技术和统计分析方法,对咸阳市1990-2007年的土地利用变化状况进行了分析,在此基础上,研究了由土地利用变化引起的咸阳市生态风险问题。结果表明：①17 a间咸阳市土地利用整体呈现耕地面积和未利用地面积减少,林地、草地、建设用地面积增加的趋势;②生态风险指...

Study on Land Use Change and Ecological Risk in Xianyang City

In this paper,the LUCC in Xianyang City during the period from 1990 to 2007 was analyzed using the RS and GIS means and statistical analysis based on the remote sensing data of land use in the city in 1990 and 2007.On which the ecological risk caused by LUCC in the city was researched.The results are as follows:(1) Area of farmland and unused land was holistically reduced in recent 17 years,but that of woodland,grassland and land for construction was enlarged;(2) Ecological risk index was in an increase trend with land use change during the period from 1990 to 2007,and it was increased from 0.130 8 in 1990 to 0.131 9 in 2007.It is predicted that land fragmentation will become more serious with rapid economic development and urbanization,and the ecological risk in the city will be continuously increased in the future.