西辽河流域平原区植被与降水及地下水埋深的关系  

Relationship among vegetation and precipitation and groundwater depth in plain area of Xiliaohe river basin

作　　者：陈志云[1] 尹雄锐[1] 季叶飞[1] 钟建华[2] 

机构地区：[1]松辽水利委员会,吉林长春130021 [2]通辽市水利技术推广站,内蒙通辽028000

出　　处：《东北水利水电》2013年第11期39-41,55,共4页Water Resources & Hydropower of Northeast China

摘　　要：以西辽河流域平原区为研究区,利用Landsat-5影像,采用最大似然法提取土地利用类型,用归一化植被指数(NDVI)计算得到植被覆盖度,结合地下水埋深、降水量资料进行分析,结果表明:自1989年至2010年,耕地、草地与居民用地的面积均不断增大;林地、未利用地的面积呈现不断减少的趋势;植被覆盖度在1989至1999年间下降,自1999年呈现上升趋势,但2010年的植被覆盖度仍小于1989年。1999—2010年研究区的植被覆盖度受降水量的影响相对较大。在上世纪90年代研究区西北部植被覆盖度受地下水埋深的影响较大。Taking the plain area of Xiliaohe river basin as the study area, the land use types could be extracted by using the Landsat-5 image and maximum likelihood method and the vegetation coverage could be obtained by the calculation of normalized difference vegetation index(NDVI). Combined with the groundwater depth and precipitation data, the analysis results show that the farmland and grassland and residential land area constantly increase from 1989 to 2010, the forest land and unutilized land area constantly decrease, the vegetation coverage decreases from 1989 to 1999 and increases from 1999, while the vegetation coverage of 2010 is less than 1989. The influence of precipitation amount on vegetation coverage is more obvious in study area from 1999 and 2010. The influence of groundwater depth on vegetation coverage is more obvious in study area from 1990s.

关 键 词：植被覆盖度 土地利用类型 地下水埋深 西辽河流域 

分 类 号：TV12[水利工程—水文学及水资源]