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The system works on the basis that crops needing the most
year-round water and year to year are grown nearest the source ( palm trees). When there is sufficient
water in the system alfalfa etc are grown next, and wheat at the end in the best years, as you
outline. The distribution is complex and involves rented and owned water on the weekly or half weekly
basis, but is naturally geared to the seasonal and annual fluctuations in water table levels, so there
is never over abstraction. I think the best way to make it more flexible might be to construct a
ground storage tank to take some of the the amount allocated by right or rental and use it when it is
wanted for trickle or other irrigation but that would then need a pump on the tank. Answer would
depend on the resources of the families concerned and the size of the falaj flow. A small elevated
tank connected via a pump to a ground storage tank would let them irrigate by gravity in small
quantities at night or day for drip or even sprinkler irrigation for vegetables if they want more than
weekly irrigation and greater efficiency. Previously people tended to make gardens beyond the falaj
lands and dig a well for vegetables but protection zones may now make that a problem? Since
distribution channels do leak and trees are often over-watered another option might be to dig a well
in the groves to re-capture some of the wasted water? Channel water losses can be reduced in smaller
falajes by a) putting a cistern at the top end of the open section and/or b) laying plastic sheet
along the channel.floor (cheapest option). I am happy to help if I can be of any assistance, but you
have probably thought of these solutions!, Where in Oman? I worked for 4 years on and down aflaj
including on water losses and irrigation efficiency there and would be interested to know how they are
working now.
Best wishes Sally Sutton