Performance of small reservoir irrigated schemes in the Upper Volta basin: Case studies in Burkina Faso and Ghana

Poussin, Jean-Christophe; Renaudin, Lorraine; Adogoba, Desmond Sunday; Sanon, Abdramane; Fowé, Tazen; Dogbe, Wilson; Fusillier, Jean-Louis; Barbier, Bruno; Cecchi, Philippe

doi:10.1016/j.wrr.2015.05.001

Cited by 31 publications

(21 citation statements)

References 18 publications

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“…They provide seasonal water storage for smallscale irrigation during the cropping season (Bharati et al, 2008), water for livestock and an opportunity for fish farming (Venot and Cecchi, 2011). They act as a buffer against extreme weather events (Boelee et al, 2013) and are considered instrumental for local food security and livelihoods (Palmieri et al, 2001;Wisser et al, 2010;Poussin et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Improving development efficiency through decision analysis: Reservoir protection in Burkina Faso

Lanzanova

Whitney

Shepherd

et al. 2019

Environmental Modelling & Software

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A B S T R A C TIn the arid areas of Sub-Saharan Africa, perennial challenges of water scarcity and food insecurity are exacerbated by climate change and variability. The development of robust strategies to cope with the region's climatic challenges requires thorough consideration of uncertainty and risk in decision making. We demonstrate the use of probabilistic decision analysis to compare intervention options to prevent reservoir sedimentation in Burkina Faso. To illustrate this approach, we developed a causal impact pathway model based on the local knowledge of expert stakeholders. Input parameters were described by probability distributions derived from estimated confidence intervals. The model was run in a Monte Carlo simulation to generate the range of plausible decision outcomes, quantified as the net present value and the annual cash flow. We used Partial Least Squares regression analysis to identify the parameters that most affected projected intervention outcomes and we computed the Expected Value of Perfect Information (EVPI) to highlight critical uncertainties. Numerical results show that the preferred intervention to secure agricultural production is a combination of dredging, rock dams and a buffer scheme around the reservoir. The EVPI calculation reveals an information value for the profit per ton of vegetables, indicating that more information on this variable would be useful for supporting the decision. However, without the need for follow-up analysis, the results show high probability of benefits given the combined interventions, which, given the current state of information, should be preferred over inaction.

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Section: Introductionmentioning

confidence: 99%

Improving development efficiency through decision analysis: Reservoir protection in Burkina Faso

Lanzanova

Whitney

Shepherd

et al. 2019

Environmental Modelling & Software

View full text Add to dashboard Cite

show abstract

“…The biome is one of the country's most important agricultural regions [3]. In recent years, a large number of small reservoirs have been built in the region, contributing to the improvement of irrigation, economic development, and the social well-being of the population [2,4,5].…”

Section: Introductionmentioning

confidence: 99%

Evaluating Evaporation Methods for Estimating Small Reservoir Water Surface Evaporation in the Brazilian Savannah

Althoff

Silva

2019

Water

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Small reservoirs play a key role in the Brazilian savannah (Cerrado), making irrigation feasible and contributing to the economic development and social well-being of the population. A lack of information on factors, such as evaporative water loss, has an impact on the design and management of these reservoirs, as well as on regional water safety. Acquiring this information is crucial for hydrologists to develop more effective water resource management strategies and policies. This study assesses the performance of a diverse number of methods that are used to estimate evaporation and provides evaporation probability curves on a fortnightly period for small reservoirs in the Brazilian savannah region. Evaporation data were collected for a small water reservoir located in the Buriti Vermelho watershed, a typical dam of the Brazilian savannah region. Among the assessed methods, those of Kohler et al. (1955) and Linacre (1993) presented the best performances on both the daily and monthly scales for evaporation estimates. By simulating the evaporation rates for a timeseries, an increasing trend in evaporation was observed for the transition between the dry and wet seasons, jeopardizing double cropping in the region. The developed probability curves are an important tool for improving water resource planning and increasing the local water availability.

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“…These reservoirs provide water to improve food security, stimulate agricultural economy and income diversification through irrigating farms, and make possible livestock farming, particularly in rural areas where most of their inhabitants rely on rainfed agriculture (Poussin et al 2015). While there are many benefits associated with these small reservoirs, their storage efficiency is significantly affected by the primary source of water loss, evaporation ).…”

Section: Introductionmentioning

confidence: 99%

Effects of atmospheric stability conditions on heat fluxes from small water surfaces in (semi-)arid regions

Abbasi

Annor

Giesen

2017

Hydrological Sciences Journal

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Atmospheric stability conditions over the water surface can affect the evaporative and convective heat fluxes from the water surface. Atmospheric instability occurred 72.5% of the time and resulted in 44.7 and 89.2% increases in the average and maximum estimated evaporation, respectively, when compared to the neutral condition for a small shallow lake (Binaba) in Ghana. The proposed approach is based on the bulk-aerodynamic transfer method and the Monin-Obukhov similarity theory (MOST) using standard meteorological parameters measured over the surrounding land. For water surface temperature, a crucial parameter in heat flux estimation from water surfaces, an applicable method is proposed. This method was used to compute heat fluxes and compare them with observed heat fluxes. The heat flux model was validated using sensible heat fluxes measured with a 3-D sonic anemometer. The results show that an unstable atmospheric condition has a significant effect in enhancing evaporation alongside the sensible heat flux from water surfaces.ARTICLE HISTORY

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Performance of small reservoir irrigated schemes in the Upper Volta basin: Case studies in Burkina Faso and Ghana

Cited by 31 publications

References 18 publications

Improving development efficiency through decision analysis: Reservoir protection in Burkina Faso

Improving development efficiency through decision analysis: Reservoir protection in Burkina Faso

Evaluating Evaporation Methods for Estimating Small Reservoir Water Surface Evaporation in the Brazilian Savannah

Effects of atmospheric stability conditions on heat fluxes from small water surfaces in (semi-)arid regions

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