干旱区生态环境知识资源中心(Arid): Integration of C-band SAR and high-resolution optical images for delineating palaeo-channels in Nagaur and Barmer districts, western Rajasthan, India

Arid

DOI	10.1007/s10661-022-10203-8
	Integration of C-band SAR and high-resolution optical images for delineating palaeo-channels in Nagaur and Barmer districts, western Rajasthan, India
	Biswas, Raja; Rathore, Virendra Singh; Krishna, Akhouri Pramod; Singh, Gulab; Das, Anup Kumar
通讯作者	Rathore, VS
来源期刊	ENVIRONMENTAL MONITORING AND ASSESSMENT
ISSN	0167-6369
EISSN	1573-2959
出版年	2022
卷号	194 期号:8
英文摘要	Identifying hitherto unknown palaeo-channels, especially in the arid regions of the Thar Desert, is crucial since these channels may form excellent aquifers, and are also associated with valuable ore deposits of many precious minerals. This study employed integrated C-band Synthetic Aperture Radar (SAR) of Sentinel-1A and high-resolution multispectral Sentinel-2A data of pre- and post-monsoon seasons (June and November) to delineate playas and palaeo-channels. This approach is the first of its kind for this area. The palaeo-channels were delineated through a detailed visual inspection of colour composite (CC) images of Sentinel-2A data, SAR backscatter (VH) images and fused SAR and optical images. Then, we studied the topographic profiles generated from the Shuttle Radar Topography Mission - Digital Elevation Model (SRTM-DEM) across the identified palaeo-channels, Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI) to further confirm the existence of a palaeo-channel's course and playas. As a result, several playas and palaeo-channels in the area were successfully identified, some of which were previously unmapped and undetected. The results indicate that the post-monsoon datasets are more useful for the precise delineation of palaeo-channels due to the presence of relatively higher moisture along the palaeo-channels' courses.
英文关键词	Palaeo-channels SAR Image fusion NDVI NDWI
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000826165800001
WOS关键词	SARASWATI RIVER ; PALEOCHANNEL ; PALAEOCHANNELS ; FUSION ; DESERT ; RADAR ; PARTS ; WATER ; IDENTIFICATION ; INFORMATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392478
推荐引用方式 GB/T 7714	Biswas, Raja,Rathore, Virendra Singh,Krishna, Akhouri Pramod,et al. Integration of C-band SAR and high-resolution optical images for delineating palaeo-channels in Nagaur and Barmer districts, western Rajasthan, India[J],2022,194(8).
APA	Biswas, Raja,Rathore, Virendra Singh,Krishna, Akhouri Pramod,Singh, Gulab,&Das, Anup Kumar.(2022).Integration of C-band SAR and high-resolution optical images for delineating palaeo-channels in Nagaur and Barmer districts, western Rajasthan, India.ENVIRONMENTAL MONITORING AND ASSESSMENT,194(8).
MLA	Biswas, Raja,et al."Integration of C-band SAR and high-resolution optical images for delineating palaeo-channels in Nagaur and Barmer districts, western Rajasthan, India".ENVIRONMENTAL MONITORING AND ASSESSMENT 194.8(2022).