Water Harvester
Wednesday, October 7, 2009 at 2:26PM 
An issue ofincreasing importance that I have noticed while working on the organic farm isthe number of leaks that occur within our irrigation system. This year inparticular, as our equipment ages, I have recognized major water leaks at thefarm. As we all know, the farm is getting its water from the Pullman Aquifer.Currently the aquifer is not rechargeable and it is declining at tremendousrates.In mydesign I have created a water harvesting device that is specific to the farm.Not only does it store excess water, but also has the capability to measure howmuch water is actually leaking at the farm. This number can be monitored asirrigation is improved by repairing water leaks and perhaps even transitioningto a newer no drip system or alternate system.
Once theexcess water is harvested in a storage device at the bottom of the farm (end ofslope) it can then be pumped back into the main line or to another area. Beforeit is pumped out of storage, water treatment may or may not be necessary. One areathat could use this water might be to the structure that is housing students.
The drains capturing leaking water might also be used tocapture rain water; however estimates of water leakage wouldn’t be as accurate duringthese periods.
Misha Manuchehri
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Reader Comments (3)
In the short presentation Misha talked about putting a water barrier under the entire farm so that we could collect all the extra water that seeps past the roots of the crops. since there is a clay layer under the organic layer the water will naturally hit that clay layer and travel down the slope called inter flow. this will act much like putting a tarp under the entire farm now the only issue is collecting it at the bottom. If we dig a very deep trench and bury cistern we can design a collection system that may collect a significant amount of water with out having the excavation costs of burying a impermeable barrier.
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