Abstract
A prediction of the quantity of water likely to escape through cavernous limestone under full-reservoir conditions may be possible based on the knowledge of void space and average velocity of water in limestone. In practice, in place of actual void space, the total cross-sectional area of limestone in the probable zone of leakage and the “void-ratio” are calculated. A statistical approach with the data obtained from planned exploratory drilling and water percolation tests provides values for void-ratio whereas knowledge of detailed subsurface geology helps to deduce the sectional area. The average velocity of water can be obtained from the study of natural tritium in groundwater or injection of chemical and radioactive tracers and various hydrological investigations, such as water-balance calculations in adjacent basins.
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