Wow, I never heard of anything quite like that! Based on what you have said, I
would approach it based on gut feel probability.

One (1) doesn't make sense unless something happened in the just prior to eleven
(11) years ago that could have caused a change in the Rhyolite rock, . . .
earthquake.

Two (2) doesn't make sense unless eleven years ago a policy or something changed
that allowed shallow basements to be constructed below the Rhyolite aquifer
layer.

Three (3) is interesting, but if the water level is rising at a detectable
level, then I would think some sort of mass balance with the water being
transported from the lake could determine that, compare pumped water from the
lake with water received at the treatment plant, or even water at the meter.
Ditto for four(4).

I don't understand five(5). I think that given my uninformed response, it is
the process of elimination and you should start elminating based on the lowest
cost to eliminate to the highest cost to eliminate.

Lenny



-----Original Message-----
From: "C. P. Kumar" <cpkumar@...>
Sent: Saturday, August 1, 2009 2:10pm
To: rhydrology@yahoogroups.com
Subject: [rhydrology] Rising groundwater levels in Jodhpur City, India

Dear Friend,

Jodhpur, a major city of Western Rajasthan in India, has been experiencing the
problem of rising groundwater levels in many parts of the city for last 11
years, after commissioning of the Rajiv Gandhi Link Canal (RGLC) which brings
canal water to Jodhpur city and stores water in Kailana lake located west of
Jodhpur city. Basements of buildings are being flooded in many parts of the
city. There can be one or more of the following probable reasons for rising
groundwater levels in Jodhpur city.

(1) Seepage from Kailana lake due to presence of lineaments/joints in Rhyolite
rock.

(2) Presence of impervious sandstone basement at shallow depth below the porous
Rhyolite aquifer in the city area.

(3) Seepage from pipelines carrying lake water.

(4) Leakage of used household water from unlined drain system.

(5) Reduced groundwater extraction from existing borewells and handpumps after
commissioning of RLGC.

For the above case, what would be the appropriate methodology to find the actual
reasons for rising groundwater levels in Jodhpur city and appropriate short-term
and long-term management plans for maintaining the groundwater levels at a safe
level.

Regards
Kumar