1 / 18

Case Study : Modern Spate Irrigation in the Arsi Zone

Case Study : Modern Spate Irrigation in the Arsi Zone. Presented by: John-Paul van den Ham Supervisors: Prof. Linden Vincent Dr. Frank van Steenbergen. Content. Research Questions Study Area Overview of research objects Water Management The Design Operation & Field Application

hugh
Download Presentation

Case Study : Modern Spate Irrigation in the Arsi Zone

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Case Study : Modern Spate Irrigation in the Arsi Zone Presented by: John-Paul van den Ham Supervisors: Prof. Linden Vincent Dr. Frank van Steenbergen

  2. Content • Research Questions • Study Area • Overview of research objects • Water Management • The Design • Operation & Field Application • Maintenance • Rights & Rules and Practice • Organization of Water Management • Sustainable Livelihood Analyses • Livelihood • Recommendations

  3. Research Questions • Main research questions ; How is water management taking place in the new Dodota spate irrigation system and what are the impacts and effects for irrigation, soil conservation practices and production? Simplified Sub questions; • How will water allocation take place? Which areas are most severe? Who will manage and decide upon allocation? • Who is going to do the operation and maintenance? What kind of maintenance and means are required? Who is responsible for what? • How will water be applied to the field? According to which rules and bylaws is water division taking place? Who is and how are the fields going to be prepared? • What crops will be grown? Will there be a double crop season? • How are farmers going to improve their livelihood? Will they invest labour and money to improve their livelihood?

  4. Study Area Source: IWMI, 2007 Source: Design Document, 2006

  5. Research Objects

  6. Water Management • Organizational aspects of people involved • Approaches and techniques of the design • Land and water rights • Fairness (equal water sharing) • Maintain a sustainable environment • Conflicts and conflict resolution (Mehari Haile, 2007 p.15).

  7. Design • Design objective; Irrigation system for development and improvement of this drought prone area under Food Aid. (funded by ODPPC “Food security through development”) • Typically Spate (semi-perennial) using floods. • Based on elevation map • Design Characteristics; -MC & BC and DS are regulated by sluice gates -Proportional diversion to BC but not based on command area • Future plans: -Divert near rivers -Expend the irrigated area

  8. Operation Headworks OGEE Weir • Rejection Structure • Flow Diversion Structure • Dropstructure (of-takes)

  9. 0.3m 0.4m 0.6m 1.2m 0.3m 0.5m Secondary Canal 0.02% Waterflow FC FC FC FC TC 0.05% Bund Bund Bund TC Contour Contour Field Application Tertiary Canal Field Canal Bunds 1.7m 1.3m 0.5m 0 Distance 300m -2

  10. Maintenance • Sedimentation • Canalbed Erosion • Canal Bank Weeds • Canal Bed Weeds

  11. Rights & Rules √ • The demarcation of land that is entitled to irrigation; • Rules on breaking of diversion bunds: • Proportion of the flow going to different flood channels and fields; • The sequence in which the different fields along a flood channel are watered; • The depth of irrigation that each field is to receive; • The practice regarding second water turns. (A. Mehari, F. Steenbergen and B. Schultz, 2007) √ √

  12. Rules in Practice • Cattle in the Canals • Breaking the Canal • Breeching the Bunds • Upstream/Down- conflict

  13. Organisation of Water Management

  14. Organisation of Water Management

  15. SLA

  16. Livelihood • Participation in O&M • Education & training • Increased Yields • Acces to transportation • Market growth/Jobs

  17. Recommendations • Water Management according to administrative and hydrological boundaries • Need for government support for Operation and Maintenance • Improved water rights and rules are necessary to achieve fair distribution • Focus on education of farmers and training of TC- and branch leaders • Creation of awareness • Creation of awareness by farmers, some crops are critical for irrigation (short irrigation interval and or sensitive for water stress) • Creation of awareness by farmers , since there will be an increase of agricultural land with the double season, thus there is need for more fodder and restricted free grazing areas • Monitoring and evaluation of water distribution for improvement

  18. By John Paul van den Ham

More Related