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The weathered and fractured zones of hard rock formations constitute the potential aquifers for groundwater development. In India it has been the practice from historical times, to utilize groundwater for either domestic or agricultural purposes mostly through large diameter open wells piercing the shallow weathered portions. There has been an accelerated usage of groundwater during recent times, particularly during the ‘Green Revolution’. Due to the advent of modern techniques, simplicity in the construction of bore wells and viability to reach deeper fractured aquifers, the practice of construction of open-dug wells has almost been replaced by drilling of bore wells. The advantage of quick drilling techniques has encouraged many a user to drill to greater depths in the hope of getting higher yields. The net result of indiscriminate drilling is decline of water levels to alarming levels, which results in decrease in well yields and groundwater quality deterioration. It is in this context that an analysis of well yields, variations in static water levels, total depths in these wells of Tirupati revenue division is attempted to understand the well behavior because of the influx of floating as well as resident population is enormously increasing, thereby creating more demand for groundwater. The knowledge about the well yields and characteristics is considered imperative for effective planning and management of groundwater resources in this area. Considering the economic viability, various measures are suggested.

Quantification of Groundwater Resources using Water Table Fluctuation Method in Tirupati Division, Andhra Pradesh State, India