干旱区生态环境知识资源中心(Arid): Monitoring sediment transfer processes on the desert margin

Arid

报告编号	NASA-CR-180181, NAS 1.26:180181
来源ID	NTRS_Document_ID: 19870008789
	Monitoring sediment transfer processes on the desert margin
	Millington, Andrew C.; Arwyn, R. Jones; Quarmby, Neil; Townshend, John R. G.
英文摘要	LANDSAT Thematic Mapper and Multispectral Scanner data have been used to construct change detection images for three playas in south-central Tunisia. Change detection images have been used to analyze changes in surface reflectance and absorption between wet and dry season (intra-annual change) and between different years (inter-annual change). Change detection imagery has been used to examine geomorphological changes on the playas. Changes in geomorphological phenomena are interpreted from changes in soil and foliar moisture levels, differences in reflectances between different salt and sediments and the spatial expression of geomorphological features. Intra-annual change phenomena that can be detected from multidate imagery are changes in surface moisture, texture and chemical composition, vegetation cover and the extent of aeolian activity. Inter-annual change phenomena are divisible into those restricted to marginal playa facies (sedimentation from sheetwash and alluvial fans, erosion from surface runoff and cliff retreat) and these are found in central playa facies which are related to the internal redistribution of water, salt and sediment.
英文关键词	DESERTS DETECTION GEOMORPHOLOGY IMAGERY LANDSAT SATELLITES MASS TRANSFER MULTISPECTRAL BAND SCANNERS PLAYAS SEDIMENTS THEMATIC MAPPING EARTH SURFACE ECOLOGY EROSION MOISTURE CONTENT REFLECTANCE THEMATIC MAPPERS (LANDSAT) VEGETATION
出版年	1987
报告类型	Technical Report
语种	英语
国家	美国
URL	http://hdl.handle.net/2060/19870008789
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/259076
推荐引用方式 GB/T 7714	Millington, Andrew C.,Arwyn, R. Jones,Quarmby, Neil,et al. Monitoring sediment transfer processes on the desert margin,1987.