基于GIS的大庆市土地利用生态风险分析

基于2001年卫星遥感TM影像获取的土地利用信息,以大庆市区为研究区域,根据其土地利用结构特征,构造了综合性生态风险指数;同时利用空间分析方法对生态风险指数进行了变量空间化,通过对生态风险指数采样结果进行半变异函数分析和空间插值,编制了大庆市生态风险程度分布图,以分析解释研究区的生态风险空间分布特征和形成机理.结果表明,研究区域的生态风险表现出明显的区域不均匀性,形成了两个土地利用生态高风险区域,即萨尔图、让胡路、龙凤3个高度城市化区域和市区东南部大同区所在地,这些都是急需采取保护性措施的重点区域.

GIS - based analysis of ecological risk on land-use in Daqing City

In this paper, Daqing City was selected for case study. Land,use information obtained from satellite remote sensing TM image in 2001 was used as main data source. An ecological risk index was constructed based on the varieties of land use; and the system sampling method was used to make it a spatial variable. After samplings carried out, the semivariagram analysis and block kriging were conducted to gain the map of distribution of ecological risk. The results indicate that the spatial distribution of ecological risk become more uneven in the working area, and two belt areas with high ecological risk are formed in this region. The two areas with high ecological risk are key areas for adopting ecological protection measures.