DIVERSION DISTRIBUTION OF WATER

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EVALUATION OF SPATE WATER DISTRIBUTION AND
APPLICATION STRUCTURES
Dr. M. Munir Ahmad Engr. Zafar Islam Engr. Fazal
Minallah Water Management of Spate Irrigation
Systems PARC, D. I. Khan
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INTRODUCTION

• Earthen Structure
• Not Dependable
• Labour intensive and Time Consuming
• Need repair after each spate
• OBJECTIVES
• Develop and adapt water Management technologies
• for distribution/diversion and application of
  spate water

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PROCESS FOR SELECTION OF SITES AND EXECUTION

• Reconnaissance Surveys
• Local community approach
• Visit field with the community
• Discusiion for Water rights
• Planning for survey

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CONTINUED..

• PEAK AND AVERAGE FLOW ESTIMATION
• DESIGN Preparation
• Implementation Schedule
• ESTIMATION OF THE MATERIAL Cost
• PARTICIPATORY EXECUTION
• Participatory MONITORING EVAULATION

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PARAMETER FOR EVALUATION

• Hydraulic
• Discharge, Sedimentation, Velocity , Erosion
• Social
• Water Rights, Change in Livelihood
• Economic
• Fixed and variable cost, Cost benefit

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3-D View of a Field inlet/Outlet
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Advantages

• Can close inlet after irrigation easily and avoid
  water flowing back out
• Can use it to irrigate next field

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Improved Design of a Diversion Structure
Include Bearings for easy operation
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Advantages

• Avoid conflicts
• Regulate flow division
• Irrigate several areas simultaneously

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Frequency of Spate Water Arrival during 2006,
Daraban Zam
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Duration of Spate Water during 2006, Daraban Zam
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Discharge and area to be irrigated from various
structures
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DIVERSION / DISTRIBUTION OF WATER
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Farmers Benefited from Distribution Structure
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Area Increase for Irrigation Due to the Structure
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Percentage Share of Cost
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COST OF GATED STRUCTURES FOR WATER DIVERSION AND
CONTROL
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Impacts

• Strengthen Village organization.
• No conflict during 2006
• Irrigated area increased
• Farmer made a rules for contribution to maintain
  the structure
• Farmer from the other villages who irrigated from
  the structure are willing to contribute.
• Less pressure on main bund