irrigation_transfer - Irrigation Process Source Transfer...

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Source Transfer Field Application Irrigation Process
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Irrigation – TRANSFER Issues Small scale transfer via ditches and canals is inefficient – approx. 1% is lost to evaporation but depends on region water loss by seepage and leakage is estimated to be 57% in U.S. ; 70% in Asia ie. Transfer of water from source to fields
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Small Scale Transfer – Associated problems: water logging of the soil – in unlined canals weed control salination of groundwater siltation and clogging health issues exotics invade along canals
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Example: Pakistan Canal Distributary Systems 2 systems w/ 12 miles of unlined canals Ghordour Lagar Length (ft) 67,919 62,218 Design discharge 50 cfs 38 cfs Total area (ac) 20,965 16,356 Length lined (ft) 19,119 18,218 Lining done with single layer of bricks on Slightly compacted, natural soil
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Weed growth: irrigation canals are warm, shallow, dirt-lined and well-illuminated, frequently with enhanced nutrient levels and newly available substrate for colonizing plants >>>> excessive growth of weeds Problems: impedes water flow traps sediment allowing canal to fill in creates flooding in adjacent fields
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irrigation_transfer - Irrigation Process Source Transfer...

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