MESQUITE TREE INFESTATION ON GASH SPATE IRRIGATION SYSTEM: Impacts and Remedial Measures
1.4 Unlocking the potential in spate irrigation.
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Transcript of 1.4 Unlocking the potential in spate irrigation.
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1.4Unlocking the potential in spate irrigation
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Agricultural production - 1
New crops – biofuels, oil seeds, legumes, cucurbits, medicinal plants/ herbs
New varieties and exchange of varieties
Improved crop husbandry – seed treatment, weed control, target use of agri-inputs, etc
Market chains for main crops – capture changing market
Market chains for minor crops – mushroom, guar
Improved grain storage Research and documentation
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Crop yields often vary with factor 3-5
Indicating scope for improvement of crop production with agronomic and field water management improvements
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Improved grain storageDetachedfrom the
wall
Detachedfrom the floor
Opening to take grains
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Agricultural production - 2
Improved soil moisture management Pre irrigation planting Promote burrowing rodents,
crusteans and insects Improved field overflow structures Ploughing, mulching, field bunding Rules on maintaining field bunds Water distribution to allow second
turns – keeping command area compact
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Non - agricultural production
Improved livestock production Restocking Paravet services Improved breeds (exchange) Range land improvement
Improved agroforestry Spate agroforestry Uprooting invasive species Improved marketing of non timber
products Selective tree cutting bans
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Forest plantation in DI Khan (year 1)
Slope towards plants
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Kitara traditional production system: Documentation in Riman Village
Dripping black fluid flows on Concrete floar and is collected in a hole (traditional)
Dripping black fluid is collected through a pipe into a container with a cloth filter on top (improved traditional)
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Improved livelihoods
Drinking water improvements Improved drinking water ponds Sand dams Wells in dry rivers Managed artificial recharge through low
weirs, subsurface dams and water spreading
Water distribution tailored to groundwater recharge
Protection measures Village flood protection River bank protection Dune stabilization Eradication of malaria and tryposonamis
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LOW RECHARGE WEIR TO SLOW DOWN AND SPREAD FLOODS
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Banana plantation (Yemen) failed because of ingression of saline water
Yet overuse occurs
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Hand Pump Sand Filter
Filter of gradedlayers of sand
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The downsteam apron shouldbe long and deep enough to withstandthe upstream formation of gullies
Important to survey channel beddownstream and check for gullies
SOME HINTS
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Improved governance - 1
Wadi management at basin or subbasin level Upstream/ downstream use Maintain river morphology Groundwater recharge Flood management Catchment management and
dune stabilization Biodiversity and natural
vegetation (and control invasive species)
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Different source of income: annual fees, fines, penalties
• Fee collection system is well-organized
0
100000
200000
300000
400000
500000
600000
2004 2005
Othercontributions
Deposit individualfarmers forbulldozer useLivestock fines
Penalty latepayment annualfeePenalty latepaymentmembership feeAnnual feeprevious year
Annual fee
Membership fee
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Improved governance - 2
Secure land tenure and safeguarding of water rules Land registration Codification Strengthen local organization
for rules enforcement
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