naa a22 4500 510755593 CHVBK 20180411083121.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s12594-013-0069-8 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0069-8 Velocity of ground water percolation at Indaram, Godavari sub-basin, India [Elektronische Daten] [Mohan Gupta, S. Sharma] We present values of velocity of ground water percolation (Vg) over large depth intervals, varying from shallow to deeper depths in Indaram area of Godavari sub-basin. The velocities have been estimated using available measured geothermal data. Sub-surface temperatures were measured in seven boreholes. Terrestrial heat flow values are calculated using temperature data and measured values of thermal conductivity of core samples. The results show that Vg is ∼3.4 ×10−7 cm /sec in the top layers (70-150 m) and decreases to ∼0.04×10−7 cm/sec in the deeper levels around 350 m depth and becomes negligibly small thereafter, thereby, indicating that the overall permeability of the sub-surface layers, due to the occurrence of successions of permeable, semi-permeable layers gets reduced to more or less zero at depths around 350 m. The value of Thermal Peclet Number, which is the ratio of the heat transfer through convection to that through conduction, naturally becomes negligible around this depth in the area. The observed consistency of the magnitude of heat flow through various deep sections is a clear indicator that water percolation is practically reduced to zero at depths around 320-400 m and that conduction is the dominant mechanism of heat transfer below the inferred depth section, while the upper layers are dominated by recharge at various depths by near surface water from streams at Indaram. Geological Society of India, 2013 Godavari Basin nationallicence Temperature data in boreholes nationallicence geothermal gradient nationallicence Thermal conductivity nationallicence Heat flow nationallicence Groundwater percolation velocity nationallicence Gupta Mohan National Geophysical Research Institute, CSIR, 500 007, Hyderabad, India aut Sharma S. National Geophysical Research Institute, CSIR, 500 007, Hyderabad, India aut Journal of the Geological Society of India Springer-Verlag 81/4(2013-04-01), 543-548 0016-7622 81:4<543 2013 81 12594 https://doi.org/10.1007/s12594-013-0069-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0069-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gupta Mohan National Geophysical Research Institute, CSIR, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- Sharma S. National Geophysical Research Institute, CSIR, 500 007, Hyderabad, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer-Verlag 81/4(2013-04-01), 543-548 0016-7622 81:4<543 2013 81 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer