ASSESSMENT OF YIELD CHARACTERISTICS OF GRANITIC AQUIFERS IN SOUTH-INDIA

The yield characteristics in clusters of closely spaced and sparsely spaced wells in a typical granitic environment in South India are analyzed. Contrary to the belief of earlier workers, the analysis shows that the yield of the wells is not directly influenced by depth, topography, number of fractures, or the thickness of weathered zones. In a few cases, reduction of discharges were observed at certain depths, and in general, ground-water yield was contributed by shallow fractured zones. The data were statistically processed further to quantify the observed relationships among these parameters. The analysis of the results indicated similar trends regardless of whether the wells are closely spaced or otherwise throughout the basin area.