GIS application in hydrogeological studies


GIS Analysis :
Themetic maps on Geomorphology lineament, drainage (3rd order), land cover have been prepared using IRS data (1,50,000 Scale) aided by field checks. Data sets like
(i) depth of Weathered zone (well inventory method)
(ii) drainage design
(iii) lineament density have been generated as collecteal data. Digitization and overlay analysis have been performed to show sites

for groundwater development a constitution of artificial rechange structure cross analysis among linearment density, hydrogeomorphology drainage density (high, medium), land cover raster maps show pertinent results revealing sites for groundwater exploration and artificial recharge sites. DEM has been generated to show the general terrain condition.



Conclusion
Apart from direct benefits, space technoloy has clearly demonstrated its usefulness in understanding the factors responsible for maintaining the hydrological cycle, mainly the vegetel cover, surface water bodies, lithotypes and landform. Supply of groundwater even in the dry month is very much essential for sustainable development. Evolution and implementation of well thought, long term national policies and creation of a promotive international atmosphere alone can lead to such development across the world, enabling entire humankind to share the benefits of satelite remote sensing. It is true that satellite alone cannot proude information regarding confined aquifers, then geophysical and drilling data have to be consulted for acquiring subsurface information and decisions file shall be created trough overlay by GIS technique. Geoinformatics have made attempts to incorporate spatial data and non spatial attributes to solve problems on hydrogeology.

Reference
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