This paper discusses the role of paleochannels, which are remnants of stream channels cut in older rocks/sediments and filled by younger overlying sediments, representing the distribution of valley systems, in meeting current and future water requirements.
Palaeochannels are relics of ancient integrated river systems that have been buried due to various natural and man made causes.
The role such channels can play in Rajasthan has been highlighted. Beginning with the concept of 'HydroHazards' of this region, the paper points out to literature that reveals neotectonic activity that caused disorganization of natural drainage in Rajasthan, leading to the disappearance of some of the then existing rivers/streams and also changes in courses of others.
A remote sensing and resistivity survey was undertaken and these palaeochannels were identified in parts of Rajasthan. These channels have good potential to be recharged by rainwater harvesting techniques, as well as water imported through canals.
In conclusion, the author states that the artificial recharge of Palaeochannels could provide adequate long term storage of water to be used during water shortage periods.
This paper was presented at the National Seminar on Water and Culture organised by Kannada University and Sahayoga in 2007.
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