The Agricultural Water Management Solutions Project (AWM Solutions) has identified a variety of small-holder agricultural water management interventions (AWM Regional Mapping ) that have a high potential to improve the food security and livelihoods of the rural poor in sub-Saharan Africa and South Asia. The study results have now been made available online through the Investment Visualizer tool. This tool is directed at policymakers and investors in agricultural water management in sub-Saharan Africa and South Asia to assess the profits, costs, yield improvements, number of (poor) people reached, area expansion, and water use consumption of various smallholder water management options by country and region. Uptake of any of these agricultural water management investments will require capacity building, and locale-specific further assessment. Knowledge intensity and locale-specific further assessments vary by intervention and are largest for small reservoirs and lowest for in situ water harvesting. The analysis underlying the scenarios is based on an integrated modeling system that combines geographic (GIS) data analysis, biophysical and economic predictive modeling, and crop mix optimization tools to assess the regional potential for smallholder agricultural water management across sub-Saharan Africa and South Asia.

An ex-ante GIS analysis uses a set of suitability criteria to identify areas where the technology could potentially be applied, pixel by pixel, across the region based on environmental suitability and labor availability. The results are then further refined through the application of two biophysical and economic predictive modeling tools: the Soil and Water Assessment Tool (SWAT) and the model of Dynamic Research Evaluation for Management (DREAM) for a combined agronomic-economic-hydrologic cost-benefit analysis for each crop and technology assessed. Given limited market access in much of sub-Saharan Africa, we simulate local, national and international crop markets for this region, for vegetable, root and cereal crops, respectively.

Read more
REGION:
SUBREGION/COUNTRY:
SELECTIONS SUMMARY:
TECHNOLOGY:
Read More
CLIMATE:
To investigate the impacts of climate change on the expansion potential of agricultural water management strategies, results were estimated under three climate scenarios. The baseline climate reflects actual 2000-2010 climate. Two alternative scenarios represent the "driest" and "wettest" scenarios among 12 future climate change scenarios for 2050 projected by general circulation models for each region. In sub-Saharan Africa, these models were the CSIRO-Mk3.0 model and the CNRM-CM3 model; while in South Asia, the CSIRO-Mk3.0 model and the MIROC 3.2 (medium resolution) model results represent the driest and wettest outcomes, respectively. The CSIRO and CNRM models were run under the SRES A2 emissions scenario, which is considered moderate. The MIROC model was run using the SRES A1B emissions scenario to reflect the wettest outcome for the region
Read More
AGRICULTURAL COMMODITY PRICE:
Communal river diversion To account for the effects of price changes on the economic profitability of irrigation development, the implications of a 30 percent increase and a 30 percent decrease in initial crop prices on the potential expansion of agricultural water management technologies was assessed. The baseline prices are average 2007-2009 crop prices by country derived from agricultural price statistics in FAOSTAT, which initialized the simulation modeling.
Read More
AWM COSTS:
The analysis includes crop-level production costs (for capital investment and operation) for each agricultural water management intervention. Given that the cost-benefit results are very sensitive to these cost assumptions two additional cost scenarios are considered. The first assumes that agricultural water management costs increase by 50 percent and the second assumes a 50 percent decrease in these costs. Baseline irrigation costs were estimated by the AWM team from case studies. Other production costs were derived from various household survey data sets.
Read More
WHAT ARE THE COSTS AND BENEFITS OF THIS INVESTMENT SCENARIO?
Profit per Hectare ($/ha)
Legend values correspond to entire water basin features, not individual pixels.
0 - 250
251 - 500
501 - 750
751 - 1,000
1,001 - 2,000
2,001 - 5,000
5,001 - 10,000
> 10,000
AVERAGE
Rural population reached (number of people)
Legend values correspond to entire water basin features, not individual pixels.
1 - 1,000
1,001 - 10,000
10,001 - 100,000
100,001 - 250,000
250,001 - 500,000
500,001 - 1,000,000
1,000,001 - 5,000,000
5,000,001 - 10,000,000
PERSONS REACHED
Download Map
View larger image
INVESTMENT VOLUME
TOTAL NET PROFIT
YIELD IMPROVEMENT (MAIZE)
YIELD IMPROVEMENT (TOMATO)
NUMBER OF RURAL PEOPLE REACHED
people reached
NUMBER OF POOR RURAL POPULATION ($1.25) REACHED
people reached
EXPANSION OF AGRICULTURAL WATER MANAGEMENT AREA
increase in AWM area
PERCENTAGE INCREASE IN WATER CONSUMPTION
water ratio increase
CLOSE