摘要
基于10 m分辨率的DEM数据,对丹江口水库150 m、160 m1、70 m和172 m水位淹没范围进行了提取;基于2009—2010年获取的RapidEye和Landsat-5 TM遥感数据,采用面向对象分类法,对丹江口水库172 m水位线以下的区域进行了土地覆被遥感监测。据此探讨了丹江口水库消落区土地覆被的空间特征,分析了引起土地覆被空间格局差异的影响因素。监测结果表明,丹江口水库150～160 m、160～170 m和170～172 m水位消落区的面积分别为232.0 km2、242.6 km2和43.1 km2;在各水位消落区内,土地覆被类型均以耕地为主,其面积均占各区间面积的50%左右;在低水位处裸地面积较大,高水位处森林面积较大。大坝水位调度和库岸坡度是丹江口水库消落区土地覆被空间格局差异的影响因子,高程低的区域受大坝水位调度和库岸坡度的双重影响,高程较高的区域则主要受库岸坡度的影响。
In this paper,the location of the submerging area at different water levels（150 m,160 m,170 m and 172 m） in Danjiangkou reservoir basin was detected based on the DEM data,and the landcover below 172 m level was obtained by using object-oriented classification approach based on RapidEye and Landsat-5 TM data.The authors analyzed not only the spatial patterns of the landcover in the drawdown areas but also the impact factors.The results show that the acreage of the drawdown area at 150-160 m,160-170 m and 170-172 m level is 232.0 km^2,242.6 km^2 and 43.1 km^2 respectively.The acreage of the cultivated land is the largest,accounting for about 50% in every drawdown area.In addition,the acreage of the bare land is larger at the low water level,while that of the forest is larger at the high water level.Dynamic scheduling and slope constitute the impact factors on the spatial pattern of landcover.Both have a significant impact on the distribution of landcover in the low elevation region,while the slope has a significant impact on the distribution of landcover in the high elevation region.
出处
《国土资源遥感》
CSCD
2011年第4期108-114,共7页
Remote Sensing for Land & Resources
基金
中国科学院战略性先导科技专项(编号:XDA05050108)
国务院南水北调项目"利用遥感技术对南水北调中线水源区生态环境变化的监测研究"共同资助
