'File 19/252 Bahrain Water Supply' [‎14r] (29/96)

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from Zone "C M in this well and no appreciable change in
salt contents as the hole went down, so clearly Zone "B"
dominates the 'ilgoduction in this hole regardless of both
other zones being open. Westward, at Bediya, there is
a well, the water analysis of which shows 1316 parts per
million of chlorides. This is the lowest salt content of
which there is a record for this type of well. As one
goes south from Bediya, figures show that the salt contents
are rising again and by the time Zellaq is reached they
are up to 1700 ppm., with Zone H A M and "B" open. In the
new gardens south of Zellaq, chloride contents run from
1696 ppm., in the northernmost wells, to 2047 in the
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southernmost. This scheme is purely geographical so far,
and the picture is simply one of increasing salinity south
wards, with the more rapid increase on the east side of
the island. There is some indication, although no defin
ite proof, that structural position may have some influence
upon the quality of water. In certain instances, structu
ral position and quality of water appear directly related
although the relationship has not the consistency of the
geographical comparison by any means. Whether this is
significant or not remains to be seen.
STATIC HEAD OF WELLS
In some cases there has been, over a period of
several years, a notable drop in static head of wells pro
ducing from Zone "B 11 . There is not a great deal of accurate
information on this score, but in the vicinity of Zellaq
and in the refinery area, some records have been kept.
In the refinery area, wells at Sitra and at Malamir offer
the best examples for observing normal conditions, since
wells /-