CLOGGING IN DRIP IRRIGATION AND ITS REMEDIAL MEASURES

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CLOGGING IN DRIP IRRIGATION AND ITS REMEDIAL MEASURES Powered By Docstoc
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 introduction
 System components
 Advantages
 Drip irrigation payback wizard
 Drip irrigation scheduling
 Important tips for system components
 Basic system operation
 System maintenance
 Disadvantage DIS

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     DRIP IRRIGATION SYSTEM

 In drip system water is conveyed through
  a system of flexible pipe lines

 Drip system reduces water requirement
  of the plant by maintaining minimum soil
  moisture.



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          SYSTEM COMPONENTS
 A Pump to lift water
 A head tank to store the water and maintain a
  pressure head of 5 to 7 m
 Central distribution system
 Mains and secondary lines
 Trickle lines
 Plastic nozzles


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5
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   Components of a Drip Irrigation
             System
 EMISSION DEVICES :
 durable
 resistant to clogging
 Many shapes and styles
 Flow rate 0.5 – 10
 gal./hr
 Pressure compensating
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Components Continue…….

 Filters:
 used to remove organic and inorganic debris


 sand media filters,


 screen filters


 disk type filters

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        Components Continue…….

 • Chemical Injectors :
 Maintenance
 supply nutrients
 Acid: prevent calcium precipitation
 Chlorine
 control biological activity: algae and bacterial slime
 deliberately precipitate iron



                                                           9
Drip Irrigation Tubing
(Clear Demo Tubing)




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              Components Continue…….

 Air/vacuum Relief Valves:
 used to expel air that builds up in the
   pipeline network during startup and
   operation.
 allow air to enter the pipeline network
   as water exits at shutdown. This
   avoids undesirable vacuum suction in
   both the pipelines and the emission
   devices.
 installed at high elevation points, at
   control points, and at periodic
   pipeline intervals.


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   Advantages of Drip Irrigation

 INCREASED REVENUE FROM
  INCREASED YIELDS
 EARLY MATURITY
 WATER SAVING
 FERTILIZER SAVING
 ENERGY SAVING
 LABOUR SAVING

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      Advantages continue……..

 MARGINAL LAND & UNDULATED LAND CAN
  BE IRRIGATED
 USE OF SALINE WATER IS POSSIBLE FOR
  IRRIGATION
 LESS PROBLEM OF DISEASE AND PEST
 MAKES INTERCULTURE OPERATIONS EASY
 DECREASED PESTICIDE COSTS
 IMPROVED ENVIRONMENTAL QUALITY


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  Drip Irrigation Payback Wizard


 In as few as four steps, this payback wizard
  will quickly provide an estimate of how long
  it will take to recover the costs of investing
  in a drip irrigation system and estimate
  how many additional acres could be
  irrigated with conserved water.



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       Drip Irrigation Scheduling

 Drip Irrigation scheduling is the process of
  deciding when to run the drip irrigation
  system, and for how long. It is a complex
  topic but of utmost importance because it
  influences whether the crop gets the right
  amount of water and nutrients, and
  whether valuable water is wasted to runoff
  or deep percolation.


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      Important Tips for System
            Components
 Water Source
 Pump
 Backflow Prevention
 Filtration System
 Chemigation System
 Flow Meters and Pressure Gauges
 Control Valves
 Air/Vacuum Relief (AVR) Valves
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      Basic System Operation

 Monitor Key Operating
 Parameters-Once the irrigation
 season is under way, the system’s
 pressures and flows should be
 monitored, the flush water assessed,
 and system integrity ensured on a
 routine basis

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         Irrigation Scheduling



 Drip Irrigation scheduling is the process of
  deciding when to run the drip irrigation
  system, and for how long.




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          System Maintenance

 Apply Chemicals
 Flush the System
 Control Pests
 Service the Filtration System
 Service the Accessory Equipment
 Winterize the System
 Startup Procedures


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System troubleshooting guide




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. SYSTEM TROUBLESHOOTING GUIDE




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Comp. drip,sprinker,gravity




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            Disadvantage DIS
 Drip irrigation depends on extremely clean
  water
 The largest problem is that the drippers get
  clogged
 Drip irrigation requires a lot of hoses and
  they have to be moved every year if you
  practice crop rotation
 Drip irrigation is expensive
 Because the surface isn’t watered so certain
  degree of salting
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                                      reference
   http://www.aces.edu/timelyinfo/BioSysEng/2010/December/BSEN-IRR-10-05.pdf,
   Alderlieste, M.C. and J.G. Langeveld (2005). “Wastewater Planning in Djenné, Mali. A Pilot Project
    for the Local Infiltration of Domestic Wastewater,” Water Science & Technology, 51(2):57–64.
   <http://lequia.udg.es/lequianet/WatSciTech/05102/0057/051020057.pdf>., J.E. (2006). Assessing
    Progress of Community Managed Gravity Flow Water Supply
   Systems using Rapid Rural Appraisal in the Ikongo District. Michigan TechnologicalUniversity.
    Houghton MI. <http://cee.eng.usf.edu/PeaceCorps/Resources.htm>.
   Bustan, A. and D. Pasternak. (2008). African Market Garden. Encyclopedia of Water Science.Edition.
    2.CIA (Central Intelligence Agency). (2009). The World Fact Book: Benin.
   <https://www.cia.gov/library/publications/the-world-factbook/geos/bn.html>.Last accessed
    December 11, 2009.
   FAO (Food and Agriculture Organization of the United Nations). (1998). CropEvapotranspiration –
    Guidelines for Computing Crop Water Requirements. Natural
   Resources Management and Environment Department. Rome, Food and AgricultureOrganization
    of the United Nations.
   <http://www2.webng.com/bahirdarab/Evapotranspiration.pdf>.Finley, S. (2008). “Reuse of
    Domestic Greywater for the Irrigation of Food Crops.” Water, Air,
   & Soil Pollution. 199, No. 1-4, 235-245.Institut Géographique National (IGN). (2000). Pays et Villes
    du Monde, République du Bénin.
   Carte                                                                                                  26
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