论文部分内容阅读
利用TM影像与6S模型反演获得精确NDVI与Albedo数据,在NDVI-Albedo散点图空间综合分析了后溪流域的植被和地表反照率空间分布特征。后溪流域整体上植被丰富,土壤湿度大,裸地少,并且流域内南北地表特征变化显著,北部山区以自然地表为主,南部平原以建设用地人工地表为主。南北地表类型差异在NDVI-Albedo空间中表现直观,利用NDVI-Albedo作为指示因子,在流域内的山区平原衔接部位设置13条样带,结合小波分析的方法,将后溪流域南北划分,确定出一条长12.26 km的地表分界线。此分界线代表南北不同地表类型,反映不同的城镇化水平与人类活动强度,为流域因地制宜分区管理提供了基础数据与依据。
Accurate NDVI and Albedo data were obtained by inversion of TM image and 6S model. The spatial distribution characteristics of vegetation and surface albedo in Houxi Watershed were comprehensively analyzed in NDVI-Albedo scattergram space. The Houxi River Basin is rich in vegetation as a whole, with large soil moisture and few bare land. The surface features in the north and south of the basin vary significantly. The northern mountainous area is dominated by natural surface land and the southern plain is dominated by artificial land for construction land. The NDVI-Albedo space difference between the North and South is directly visualized. NDVI-Albedo is used as an indicator to set up 13 transects in the junction of the mountainous plain in the basin. By combining the wavelet analysis method, A 12.26 km long surface demarcation line. This dividing line represents different surface types of the north and south, reflecting different levels of urbanization and intensity of human activities, providing the basic data and basis for the basin management according to local conditions.