Study of Various Hydro-geological Parameters and its Influence on Groundwater Level Fluctuation in a Hard rock Terrain-A Case Study of Wagholi, Pune, India

Paper Topic :

Computational Techniques in Civil Engineering

Author Name :

Chetan S. Chavan

Abstract :

A hard rock terrain is occupied in the major parts of the India, mostly in the southern India called as peninsular shield. This shield mostly constitutes basaltic rock formation origin from volcanic, gneisses, granites and metamorphic complexes. In these basaltic rocks the porosity is at primary stage and also the main aquifer horizons are in vesicular, fractured and weathered zone. The groundwater occurs in the secondary porosity of the weathered zone at a shallow depth in unconfined aquifer. Underlain to weathered zone is a massive rock forming bottom of phreatic aquifer which limits the downward extent to groundwater. Annually the shallow unconfined aquifers get replenished and thus the fluctuations of water levels are a major content for quantification of groundwater. The pre-monsoon and post-monsoon groundwater levels indicates the saturation and recharge extent of shallow unconfined aquifer by monitoring the observation wells and bore wells in the study area. As the study area Wagholi (Pune) lies in a moderate rainfall belt, influences acute shortage towards the water resources thus the exploitation towards the groundwater is in intensive use. The stage of development, decline in water levels, factors controlling water level is discussed in the present study.

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