Volume No. 9 Issue No.: 2 Page No.: 472-479 October-December 201

 

PALEOCHANNEL INVESTIGATIONS AND GEO-HYDR- OLOGICAL SIGNIFICANCE OF SARASWATI RIVER OF MAINLAND GUJARAT,INDIA : USING REMOTE SENSING AND GIS TECHNIQUES

 

Shukla Zankhna*1 and Thakkar M. G.2

1. Department of Life Science, Hemchandracharya North Gujarat University, Patan, Gujrat (INDIA) 2. Department of Earth and Environmental Science, KSKV Kachchh University, Bhuj-Kachchh, Gujrat (INDIA)

 

Received on :

 

ABSTRACT

 

Paleochannels are remnants of stream channels cut in older sediments and filled by younger overlying sediments representing the distribution of valley systems as these existed at given geological time in the past. Reconstruction of paleodrainage network in Mainland Gujarat using remote sensing techniques has a societal relevance as the information is utilized as groundwater prospective zones and suitable sites for artificial recharge. Alluvial plain of Gujarat is a unique geomorphic province that constitutes hundreds of meters thick alluvial sediment making the region fertile and hospitable to many historic cultures of Gujarat. In the present study, we used IRS-LISS-III images for extracting information on geomorphology, vegetation cover and lineaments. The study carried out between Siddhpur in the East to the Little Rann of Kachchh (LRK) to the West forming West sloping narrow EW stretching belt. Available groundwater, rainfall, irrigation practice, crop pattern, agriculture and soil data of last 15 years are superimposed with the Remote Sensing data gives a better understandings of potential Palaeochannels and aquifer zones. In spite of good rainfall in the area, the surface water tanks do not store adequate amount of water for irrigation purpose due to sandy and loamy soil type. It indicates good percolation power of the soil; where the rainwater when flows on very gentle ground with highly permeable soil cover, spars vegetation and scanty drainage systems, they constitute short-lived reservoirs and can readily recharge ground water. Hence, it is stated based of the palaeochannel study that in the alluvial terrain they could be a potential source of groundwater, irrigation and recharge structures and finally a good thrust area for economic growth.

 

Keywords : Paleochannels, Saraswati River, IRS (Indian Remote Sensing), Groundwater recharge, Alluvial plain

 

 

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