A Partner of

TAGMI: An Interdisciplinary Decisions Support Tool in Agricultural Water Management Outscaling for

the Volta River Basin

Barron, J., Kemp-Benedict, E., Morris. J., de Bruin, A., Wang, G., Fencl, A.

this work is based on the V1 ‘Targeting and scaling out’ project led by SEI in partnership with INERA, University of Ouagadougou, CSIR-SARI

and KNUST

Andes • Ganges • Limpopo • Mekong • Nile • Volta

MAIN MESSAGES

• The TAGMI (Targeting AG water Management Interventions) is an online decision support tool developed for supporting investments and action in smallholder farming in Volta and Limpopo

It includes both biophysical and social economic conditions influencing oustcaling

It integrates multiple sources of expertise and knowledge

It provides a measure of strength of prediction

• TAGMI can guide on geographical location opportunities based on given conditions. However , implementation of action need to be done with ‘best practise in implementation ‘ for successful outcome

Andes • Ganges • Limpopo • Mekong • Nile • Volta

BACKGROUND Volta and Limpopo Basin Stakeholders demand in 2009: “…the question of what AWM intervention can work where and why”

V1-L1 purpose :To develop and evidence a knowledge-based tool to assess and map the likelihood that a given intervention will be successful in given locations, at the basin scale-three technologies, two basins

Andes • Ganges • Limpopo • Mekong • Nile • Volta

APPROACH 1 • Process of consultation : incorporate various sources of

knowledge

• Decide what is relevant AWM technologies, what is ‘success’

Consultation 2012Consultation 2011 Synthesis

Full IrrigationRainfed

Andes • Ganges • Limpopo • Mekong • Nile • Volta

APPROACH 2

• Merge interdisciplinary factors with Bayes approach

• Develop web based interface in open source and accessible data layer

Andes • Ganges • Limpopo • Mekong • Nile • Volta

1.RESULTS: current TAGMI predictionsSWC Small scale irrigation Small reservoirs

Andes • Ganges • Limpopo • Mekong • Nile • Volta

1.RESULTS: current TAGMI predictions

Soil Water Conservation # districts (%)

Cropland (% )Total BF: 2846941ha Total GH: 5102661 ha

Strength of prediction

Burkina Faso

High/Med/Low 51/25/25 61/20/20 Low

Ghana High/Med/Low 45/39/16 48/6/46 Low

Small reservoirs

Burkina Faso High/Med/Low: 50/32/18 47/20/32 Low

Ghana High/Med/Low: 62/15/23 58/36/7 Low

Andes • Ganges • Limpopo • Mekong • Nile • Volta

1.RESULTS: current TAGMI predictionsExample data input and impact

Andes • Ganges • Limpopo • Mekong • Nile • Volta

2. RESULTS: testing TAGMI for small reservoirs

MAPS……. Decision in SR may not be done at HH level;

mainly in 80s

Andes • Ganges • Limpopo • Mekong • Nile • Volta

2. RESULTS: testing TAGMI for Soil water conservation

TAGMI predictions match actual adoption rates for about half of the provinces

Andes • Ganges • Limpopo • Mekong • Nile • Volta

LESSONS• Data on social-human layers are critical, but rarely

available

• High agreement between factors affecting outscaling across technologies, countries and basins

• The importance of Best Practice In Implementation (‘Due diligence’ )to achieve successful outscaling

• There is opportunity for outscaling of SWC , smallholder irrigation and small reservoirs but prediction strength is low

Andes • Ganges • Limpopo • Mekong • Nile • Volta

RECOMMENDATIONS TO POTENTIAL USERS

• Consider carefully weighting of factors contributing for success and the implications on map output

• Opportunities to verify a/o cross check TAGMI prediction

• Improve data especially on human-social domains

• Identify potential geographic spaces only half the story: more effort in design of appropriate implementation

Andes • Ganges • Limpopo • Mekong • Nile • Volta

www.seimapping.org/TAGMI

We thank all contributors: absent colleagues

farmers, boundary partners and participants in consultations and eventsVBDC colleagues, and LBDC and L1 colleagues

funders