"ملف 19/252 الموارد المائية في البحرين" [و‎‎٧] (٩٦/١٥)

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Introduc tion
ih is report is concerned with the sources or domestic
v^&ter on Hahrain Island and an attempt to evaluate these sources
with respect to their productivity and their ability to sustain
production. Discussion will be limited to those sources outside
the "Rim Rock" as being of primary value. Sources within the
"Rim Rock" are relatively unimportant as compared with those
outside, and are furthermore, of dirierent origin.
Water within the "Rim Rock" is obtained at a rather uni
form elevation and appears to be fresh by virtue of an en-
filtration of rain water which floats on top of denser salt
water contained in the formation. as the rate and volume of
water withdrawal from wells in this area is increased, the salt
content should increase regardless of withdrawals or contamina
tion at other points. Also, in years of heavy rainfall the
salt content might be expected to drop slightly.
Summary and Hecnmmpnri ations
There are three water producing zones on the Island.
01 these three. Zone "B" is the most important and furnishes
the great majority of the potable water. Neither Zone "A"
nor Zone "C" has been isolated olten enough to furnish conclusive
prool ot its individual worth. It is recommended that in the
future, every ellort be made to collect data on these horizons.
Salt contents of water increase as one goes from north
to south on the island, with the more rapid increase on the east
side. Information on this problem is sadljt lacking south of
Zellaq. and south ol the refinery area. Every effort should be
made to gather evidence pertinent to this condition. It is
said that scattered wells have been drilled in the area south
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