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Prioritising rainwater management strategies An Notenbaert March 2013

Prioritising rainwater management strategies An Notenbaert March 2013. Prioritizing r ainwater management strategies in the Blue Nile basin…. Funded by CPWF - in collaboration with IWMI, OARI, ARARI, ERHA. Prioritizing r ainwater management strategies in the Blue Nile basin….

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Prioritising rainwater management strategies An Notenbaert March 2013

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  1. Prioritising rainwater management strategies An Notenbaert March 2013

  2. Prioritizing rainwater management strategies in the Blue Nile basin… Funded by CPWF - in collaboration with IWMI, OARI, ARARI, ERHA

  3. Prioritizing rainwater management strategies in the Blue Nile basin… Multi-stage process Diagnosis Alternative options (ex-ante) Impact assessment Characterisation of the options Targeting / out-scaling

  4. A multitude of challenges Food insecurity High poverty levels Declining soil fertility Low and variable yields Land degradation Water logging ….

  5. Characterisation of the rainwater management practices (RMPs) • Many different practices aimed at addressing one/several of these challenges • Suitable in different contexts • Bio-physical, socio-economic and institutional conditions that influence their suitability, adoption and success. RMP database

  6. “Suitability maps” • Matching conditions favoring the successful implementation of an option to a spatially referenced database: • - Delineation of geographical areas where this specific strategy is likely to have a positive impact. • transforming the previously identified characteristics for a technology into variables for which spatial data exist or can be collected • GIS overlays

  7. “Suitability maps”

  8. Adoption of RMPs

  9. Adoption of RMPs

  10. Feasibility maps Suitability x adoption = feasibility

  11. Rainwater management strategies • Rainwater management practices to be combined into Rainwater Management Strategies at landscape scale • Overall aim: sustainably increase the system’s productivity • Trade-offs / synergies • At different spatial and temporal scale

  12. Blue Nile strategies On the basis of the experiences from the GIZ/SLM program, we identified a number of “best-bet” practices; currently being promoted

  13. Suitability / feasibility map practice II Suitability / feasibility map practice III Suitability / feasibility map practice I Blue Nile strategies Zonal statistics (B) Landscape delineation layer (A) Nile Tool Strategy quantification (C) Targets practice III Targets practice II Targets practice I Rainwater management strategy map (D)  per watershed: “most likely to be adopted” strategy

  14. Impact Assessment • For different stakeholders • At different spatial and temporal scales (e.g. downstream effects) • In terms of different metrics: yield increases, economic returns, food security and income, environmental sustainability, social and cultural acceptability. • This is where the Basin wide SWAT modeling comes in

  15. Prioritizing rainwater management strategies in the Blue Nile basin… Multi-stage process Diagnosis Alternative options (ex-ante) Impact assessment Characterisation of the options Targeting / out-scaling

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