期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：Climatic changes and neotectonic movements in the north-western plains of India have led to the migration and abandonment of drainage systems to form a large number of palaeochannels. Palaeochannels present in the study area were extracted from final geomorphological map. These were delineated from satellite image by considering combination of various factors. These channels show a discontinuous drainage pattern, trending in NE-SW and NNE-SSW directions. Their width ranges between 100-300 metres. Channels close to present day river course have comparatively high moisture as compared to others. These palaeochannels were occupied by reworked sand heaped in the form of dunal ridges. Presently signatures of these palaeochannels have been obliterated from the ground due to leveling/ sand removal for cultivation. Inference of the drilling data suggests that the column thickness of palaeochannels ranges between 17 and 85 metres. They are constituted by alternating layers of fine to medium sand including kankar and gravel beds at certain depths. Water level in most of the tube wells drilled ranges between 4 and 20 metres. Groundwater quality of the tube wells drilled along them is much better than those located away from the palaeochannels. Palaeochannels in this area are important because of their hydrological potential and can help in augmenting groundwater resources in the region through recharging
