Integrated rainwater management strategies for environment and resilience
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Transcript of Integrated rainwater management strategies for environment and resilience
Integrated rainwater management strategies for environment and resilience
Tilahun Amede
Nile Basin Development ChallengeScience and Reflection WorkshopAddis Ababa, 4-6 May 2011
• Crop livestock systems• Drought-prone, short rains• Degraded hillsides, eroded
farm lands• Livestock for draft and risk
management• Limited collective action;
search for alternative income • Poverty and resources
degradation • Small lake in the valley
bottom
AMARAW project; ILRI-IWMI project
• Community awareness;• Mapping of landscapes,
institutions, actors• Base lining, historical
perspectives;• Collective action schemes
(community lead, PA lead, local byelaws, fining..);
• Establishing farmer groups (gully group, forage group, tree group, livestock group etc.)
• Plan for action
Strategies
Participatory identification and testing of good practices
Availing technology options
Facilitating collective action (labour, resources..)
Political and institutional support
Practices…
- Degraded hillslopes are closed for grazing and wood cutting- From 2004 to 2007: 208 ha closed (+/- 40% of rangelands)- Distributed among 530 farmers - Contour trenches for improved water infiltration and planting of multi-purpose trees
Exclosures
open grazing exclosure
Before treatment productive water flow only about 50% After treatment productive water flow increased to 78%
Exclosure establishment
Open grazing Exclosure
Exclosures..Vegetation restoration results in restoration of ecosystem services:
-Supporting: soil formation, nutrient cycling
-Regulating: climate, water flows, ground water
-Provisioning: biomass (herbaceous, woody), non-wood forest products
-Biodiversity, birds, vegetation
-Reduced runoff, water quality
About 2.8 tonnes of DM ha-1 – Feed, energy and other uses Reduced the pressure on farmlands on biomass..
Watering pointsWater for multiple uses: irrigation (50%),
livestock (30%), domestic (20%)
Water for livestock drinking in the dry period (community ponds are empty)
Reduced walking distance from 9 km to 2 km; Energy is reduced from 1956 MJ ME / TLU to 584 MJ ME / TLU per year (Milk equivalent of 350 litre)
No change in water depleted for feed
Implications
Reduced erosion / land degradation Increase tree survival Overall system change Saving water resources
Upslope management protect reservoirs & irrigation schemes
Upslope management enabled regeneration of dried springs
With NBDC +…