Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

R. K. Prasad ¹, N. C. Mondal ¹, V. S. Singh ¹

Affiliations
1 National Geophysical Research Institute, Hyderabad-500007, IN

Abstract

Groundwater resources potential has been evaluated in Kurmapalli watershed, Andhra Pradesh, India using Geographic Information System (GIS) technique. It allows manipulation and analysis of individual layer of spatial data. It is used for analyzing and modeling the interrelationship between the layers. Various thematic maps have been prepared for geology, geomorphology, slope, drainage-density and lineaments of the study area using GIS technique. These thematic maps have been integrated with the help of GIS. Appropriate weightage has been assigned to various factors controlling occurrence of groundwater to assess the total groundwater potential in each segment of the study area. The results show that there are five categories of groundwater potential ranging from very good to poor. The categorizations of groundwater potential zones are in general agreement with the available yield data of the 438 existing dug wells, bore wells and tube wells. This depicts the favourable prospective zones in the study area for evaluation of groundwater potential.

Keywords

Hard Rock Aquifer, Aquifer Yield, Evaluation of Groundwater Potential, GIS, Spatial Analyst Tool.

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D. V. Sarwade ¹, V. S. Singh ¹, S. C. Puranik ², N. C. Mondal ¹

Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Kamatak University, Dharwad - 580 003, IN

Abstract

Estimation of aquifer parameters namely transmissivity (T) and storativity (S) are vital for the evaluation of groundwater resources. To estimate the accurate aquifer parameters, there are several methods (i e hydrograph analysis pumping test, etc). In Asian and Southeast Asian countries large diameter wells are abundant and they are often cost effective means to conduct pumping test as one can use the farmer's pump to perform this test. There are several suggested methods to estimate aquifer parameters through pumping test data, in which, curve matching and numerical methods are widely used. In this paper we have given special emphasis to pumping tests and data interpretation, which were carried out at 12 locations in a basaltic terrain at Belgaum city, Kamataka, India. The data is interpreted by using both analytical and numerical methods, and compared with them The results of analytical methods have shown up to 35% error involved in the calculated drawdown as well as residual drawdown in comparison with the field observations, whereas it is less than 45% m the case of numerical method Hence the present study shows that the numerical method IS found to be more accurate than the analytical curve matching method for estimating the aquifer parameters.

Keywords

Hydrogeotogy, Unconfined Aquifers Pumping Test, Analytical And Numencal Methods Transmissivity, Storage Coefficient, Belgaum City, Kamataka.

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N. C. Mondal ¹, V. P. Singh ²

Affiliations
1 NGRI, Hyderabad, IN
2 TAMU, Texas, US

Abstract

No Abstract.

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