Dear Amit, While I agree on ...

Dear Amit, While I agree on the need of detailed studies for a detailed estimation, following is a rule of thumb that could work for your case. -Vertical hydraulic condutivity of the base establish an upper threshold of the infiltration. You can easily determine it by using double ring infitrometers. Methodology can be found elsewhere. -Free surface water balance (Precipitation-Evaporation) provides you the net water input to the pond. Should there be additional inputs (surface water, ...) must be added -A balance between the inputs and the maximum output gives you a range of the infiltration loses For managed aquifer recharge, the methodology is approximately the same. The more resources you have, the more instruments you can use ... We run some projects here in Spain and results are OK. Should you or any of the group need some info, just let me know. Best regards, Jordi Guimera