Dear Group Member,

I came across an interesting problem, as given below.

In an arid region, heavy depletion of water is observed from a
reservoir underlain by carvenous limestone. There could be either or
both of the following two reasons for the same.

1. In the submergence area of dam, a number of dug-cum-bore wells
exist which recharge the aquifer whenever the reservoir water level
rises above the parapet of the wells (acting as recharging wells).

2. Due to presence of wide fractures in the underneath limestone
layer.

I invite suggestions from the learned members regarding research
methodology to be followed for finding the real cause of heavy
seepage from the reservoir - hydrogeological investigations,
assessing the direction of seepage water / groundwater flow, nuclear
techniques, modelling of groundwater flow, and suggesting appropriate
remedial measures (such as sealing the wells with impervious clay).

Regards
Kumar