A decision-support tool for water allocation in the Volta Basin

Condappa, Devaraj de; Chaponnière, Anne; Lemoalle, Jacques

doi:10.1080/02508060802677861

Cited by 34 publications

(21 citation statements)

References 10 publications

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“…The GCM outputs are used as inputs to hydrological models, which calculate the streamflow in the basin. The combined use of mathematical models makes possible the estimate of the possible impact of streamflow reduction in water allocation, as can be seen in Condappa et al (2009) and Vaze et al (2011). Integration of the GCMs/hydrological models has been accomplished using different types of models such as VIC (Variable Infiltration Capacity) (Liu et al, 2010), Large Basin Hydrological Model (MGB-IPH) (Nóbrega et al, 2011), and DiCaSM (Distributed Catchment Scale Model) (Montenegro and Ragab, 2012), among others.…”

Section: A Ribeiro Neto Et Al: Water Demand Under Climate-induced Smentioning

confidence: 99%

Infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the urbanizing Capibaribe River basin – Brazil

Neto

Scott

Lima

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract.Water availability for a range of human uses will increasingly be affected by climate change, especially in the arid and semiarid tropics. The main objective of this study is to evaluate the infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the Capibaribe River basin (CRB). The basin has experienced spatial and sectoral (agriculture-to-urban) reconfiguration of water demands. Human settlements that were once dispersed, relying on intermittent sources of surface water, are now larger and more spatially concentrated, which increases water-scarcity effects. Based on the application of linked hydrologic and water-resources models using precipitation and temperature projections of the IPCC SRES (Special Report: Emissions Scenarios) A1B scenario, a reduction in rainfall of 26.0 % translated to streamflow reduction of 60.0 %. We used simulations from four members of the HadCM3 (UK Met Office Hadley Centre) perturbed physics ensemble, in which a single model structure is used and perturbations are introduced to the physical parameterization schemes in the model (Chou et al., 2012). We considered that the change of the water availability in the basin in the future scenarios must drive the water management and the development of adaptation strategies that will manage the water demand. Several adaptive responses are considered, including water-loss reductions, wastewater collection and reuse, and rainwater collection cisterns, which together have potential to reduce future water demand by 23.0 %. This study demonstrates the vulnerabilities of the infrastructure system during socio-hydrological transition in response to hydroclimatic and demand variabilities in the CRB and also indicates the differential spatial impacts and vulnerability of multiple uses of water to changes over time. The simulations showed that the measures proposed and the water from interbasin transfer project of the São Francisco River had a positive impact over the water supply in the basin, mainly for human use. Industry and irrigation will suffer impact unless other measures are implemented for demand control.

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Section: A Ribeiro Neto Et Al: Water Demand Under Climate-induced Smentioning

confidence: 99%

Infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the urbanizing Capibaribe River basin – Brazil

Neto

Scott

Lima

et al. 2014

Hydrol. Earth Syst. Sci.

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“…Interactions or synergies between the two projects are not evident. The second DSS [51] refers to the grant "Basin Focal Project-Volta", a part of the CGIAR (Consultative Group on International Agricultural Research) Challenge Program on Water and Food. In this case, the modelling system is based on the combination of a spreadsheet calculator for the hydrologic cycle and the software-Water Evaluation and Planning (WEAP)-for water allocation.…”

Section: West Africa (Volta River Basin)mentioning

confidence: 99%

Decision Support Systems for Water Resources Management in Developing Countries: Learning from Experiences in Africa

Giupponi

Sgobbi

2013

Water

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Decision support system (DSS) tools are rather popular in the literature on water resources management. The European Project "Splash" conducted a survey of the literature and of DSS implementation in developing countries with specific reference on Africa. Experts in the field were consulted through an ad hoc questionnaire and interviews. The results of the survey indicate that the exchange of experiences amongst projects with similar objectives or even the same case study is very limited, with a tendency towards restarting every time from scratch. As a consequence, it seems that DSS developments have produced only limited positive impacts. Most experts contacted shared either the frustration deriving from the limited impacts on intended end-users, who rarely used the tool after the project end, or in the case of ongoing projects, the preoccupation for future maintenance. Responses from the questionnaires indicate that priority efforts should not focus on developing the tools, but rather on improving the effectiveness and applicability of integrated water resource management legislative and planning frameworks, training and capacity building, networking and cooperation, harmonization of transnational data infrastructures and, very importantly, learning from past experiences and adopting enhanced protocols for DSS development.

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“…This is materialized by a lowering of the water table, which did not reach its mean level (estimated during the 1950-1960 period on the crystalline bedrock areas) since 1970 [6,10]. Thus, water resources management in the Sahelian area has been complicated [11,12] under the two constraints: decrease in runoff and depletion of groundwater.…”

Section: Introductionmentioning

confidence: 99%

Hydrological Impacts of the Changes in Simulated Rainfall Fields on Nakanbe Basin in Burkina Faso

Ibrahim

Karambiri

Polcher‬

2015

Climate

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Changes in rainfall regime during the last five decades over the West African Sahel have significantly modified the hydrological regime of many rivers with a significant impact on water resources. In this study, the main hydrological processes on the Nakanbe watershed in Burkina Faso are described with two hydrological models: GR2M (lumped and monthly model) and ORCHIDEE (ORganising Carbon and Hydrology In Dynamic EcosystEms) (distributed and half hourly model). Both models were calibrated on the watershed from observed runoff data at Wayen outlet (area of 22,000 km 2 ) for the 1978-1999 period. The mean annual hydrological balance components on the watershed over this period are composed of about 4% of runoff, 10% of groundwater recharge and 86% of actual evapotranspiration for both models. An assessment of the hydrological impacts of the changes in rainfall regime simulated by five regional climate models shows some discrepancies. The hydrological simulations show that the hydrological impacts on the water balance of the watershed come mainly from the changes in rainfall field with regard to the frequency and the intensity of rain events. Compared to the decrease in frequency, it appears OPEN ACCESS Climate 2015, 3 443 that the decrease in the intensity of rain events is much more prejudicial to runoff and groundwater recharge.

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A decision-support tool for water allocation in the Volta Basin

Cited by 34 publications

References 10 publications

Infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the urbanizing Capibaribe River basin – Brazil

Infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the urbanizing Capibaribe River basin – Brazil

Decision Support Systems for Water Resources Management in Developing Countries: Learning from Experiences in Africa

Hydrological Impacts of the Changes in Simulated Rainfall Fields on Nakanbe Basin in Burkina Faso

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