Watershed Management In The Volta River Basin West Africa
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Watershed Management In The Volta River Basin West Africa
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Author : Joie Chiana Taylor
language : en
Publisher:
Release Date : 2003
Watershed Management In The Volta River Basin West Africa written by Joie Chiana Taylor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The Volta River Basin
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Author : Timothy O. Williams
language : en
Publisher: Routledge
Release Date : 2016-09-19
The Volta River Basin written by Timothy O. Williams and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-19 with Nature categories.
The Volta River Basin (VRB) is an important transboundary basin in West Africa that covers approximately 410,000 square kilometres across six countries: Benin, Burkina Faso, Côte d’Ivoire, Ghana, Mali and Togo. Its natural resources sustain the livelihoods of its population and contribute to economic development. This book provides a comprehensive, interdisciplinary review and assessment of the issues and challenges faced. The authors provide a science-based assessment of current and future scenarios of water availability, the demands of key sectors, including agriculture and hydropower, and the environment under changing demographic, economic, social and climatic conditions. They also identify solutions and strategies that will allow available water resources to be sustainably used to improve agricultural productivity, food security and economic growth in the VRB. Overall, the work examines from a multidisciplinary and multi-stakeholder perspective the solutions and strategies to improve the use of water and other natural resources in the VRB to achieve enhanced food security, livelihoods and economic growth.
The Water Resource Implications Of Changing Climate In The Volta River Basin
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Author : Matthew McCartney
language : en
Publisher: IWMI
Release Date : 2012
The Water Resource Implications Of Changing Climate In The Volta River Basin written by Matthew McCartney and has been published by IWMI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The Volta River is one of the major rivers in Africa. In this study, a dynamic regional climate model (CCLM), a hydrological model (SWAT) and a water resource model (WEAP) were used to provide an assessment of one downscaled ‘middle impact’ climate change scenario on the performance of existing and planned irrigation and hydropower schemes. The results indicate that, by the middle of the twenty-first century, altered climate is likely to undermine the technical performance of existing and planned reservoirs, which will, in turn, affect development outcomes. Future water resources development in the basin requires interventions that bolster resilience and water security. Much more systematic planning of water storage, greater cooperation between the riparian states and consideration of innovative approaches to water storage are needed.
Water Resources Assessment Of The Volta River Basin
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Author : Marloes Mul, Emmanuel Obuobie
language : en
Publisher: International Water Management Institute (IWMI)
Release Date : 2015-02-01
Water Resources Assessment Of The Volta River Basin written by Marloes Mul, Emmanuel Obuobie and has been published by International Water Management Institute (IWMI) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-01 with Technology & Engineering categories.
The Volta River Basin
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Author : Taylor & Francis Group
language : en
Publisher: Routledge
Release Date : 2020-12-18
The Volta River Basin written by Taylor & Francis Group and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-18 with categories.
The Volta River Basin (VRB) is an important transboundary basin in West Africa that covers approximately 410,000 square kilometres across six countries: Benin, Burkina Faso, Côte d'Ivoire, Ghana, Mali and Togo. Its natural resources sustain the livelihoods of its population and contribute to economic development. This book provides a comprehensive, interdisciplinary review and assessment of the issues and challenges faced. The authors provide a science-based assessment of current and future scenarios of water availability, the demands of key sectors, including agriculture and hydropower, and the environment under changing demographic, economic, social and climatic conditions. They also identify solutions and strategies that will allow available water resources to be sustainably used to improve agricultural productivity, food security and economic growth in the VRB. Overall, the work examines from a multidisciplinary and multi-stakeholder perspective the solutions and strategies to improve the use of water and other natural resources in the VRB to achieve enhanced food security, livelihoods and economic growth.
Multiple Uses Of Small Reservoirs In Crop Livestock Agro Ecosystems Of The Volta River Basin With An Emphasis On Livestock Management
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Author : Ayantunde, A. A.
language : en
Publisher: International Water Management Institute (IWMI)
Release Date : 2017-06-13
Multiple Uses Of Small Reservoirs In Crop Livestock Agro Ecosystems Of The Volta River Basin With An Emphasis On Livestock Management written by Ayantunde, A. A. and has been published by International Water Management Institute (IWMI) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-13 with Technology & Engineering categories.
Shared Water Resources In West Africa
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Author : Nwamaka Chigozie Odili
language : en
Publisher: BRILL
Release Date : 2018-07-17
Shared Water Resources In West Africa written by Nwamaka Chigozie Odili and has been published by BRILL this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-17 with Law categories.
In Shared Water Resources in West Africa: Relevance and Application of the UN Watercourses and UNECE Water Conventions, Nwamaka Chigozie Odili addresses the question of whether riparian states in West Africa need to be parties to both the UN Watercourses Convention and the UNECE Water Convention.
Modelling Riverflow In The Volta Basin Of West Africa
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Author : Barnabas Akurigo Amisigo
language : en
Publisher: Cuvillier Verlag
Release Date : 2005
Modelling Riverflow In The Volta Basin Of West Africa written by Barnabas Akurigo Amisigo and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Modelling Impacts Of Climate Change On Water Resources In The Volta Basin West Africa
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Author : Raymond Abudu Kasei
language : en
Publisher:
Release Date : 2010
Modelling Impacts Of Climate Change On Water Resources In The Volta Basin West Africa written by Raymond Abudu Kasei and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Development Of A Water Balance For The Atankwidi Catchment West Africa A Case Study Of Groundwater Recharge In A Semi Arid Climate
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Author :
language : en
Publisher: Cuvillier Verlag
Release Date : 2006-05-31
Development Of A Water Balance For The Atankwidi Catchment West Africa A Case Study Of Groundwater Recharge In A Semi Arid Climate written by and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-05-31 with Science categories.
Regolith aquifers in the weathered zone overlying Precambrian basement rocks serve as the main source of groundwater in a large part of the Volta River basin in West Africa. A prerequisite for sustainable groundwater resources management is the knowledge of recharge processes and the annual recharge rate. This research assesses the water balance, and in particular the groundwater recharge rate, for the Atankwidi catchment, a 275 km² sub-catchment of the White Volta in northern Ghana. Large uncertainties are typically inherent in any singular method to determine groundwater recharge. For this reason, an integrated approach is developed in this work which makes use of several field methods and combines results from these methods with water budget modeling. Field methods included in this approach are groundwater level observations, isotope analyses and a Chloride mass balance. The Atankwidi catchment falls within the semi-arid Sudan-Savanna climate zone. The climate is characterized by high temperatures and a single rainy season from May to October with an average annual rainfall of 990 mm. The hydrogeological system consists of three aquifers: The discontinuous, shallow aquifer, the regolith aquifer and the fracture aquifer. The principal aquifer is the regolith aquifer in the weathered mantle, which is usually targeted for drinking water supply. It forms a continuous aquifer with an average saturated thickness of 25 m and a hydraulic conductivity of 2.5E-6 to 2.5E-5 m/s. Recharge rates vary considerably between wet and dry years and between locations, with a range of 2 % to 13 % of annual rainfall. The long term recharge rate is determined by the Chloride mass balance to be approximately 6 % of average annual rainfall. The research emphasizes the importance of high rainfall intensities in creating groundwater recharge. Interannual comparison of water level fluctuations shows that a decrease in annual rainfall of 20 % causes a reduction of groundwater recharge of 30 % to 60 %. The impact of changing quantities of annual rainfall on groundwater recharge is overestimated by methods that do not account for infiltration by preferential flow. A long term average groundwater recharge of 60 mm/y compares to a total current groundwater abstraction of 4 mm/y in the study area, which is one of the areas with the highest groundwater use per km² in the Volta River basin. Recharge is therefore currently not a limiting factor for groundwater resources development. Water budget modeling using WaSIM-ETH calculates that 63 % of annual rainfall is lost to evapotranspiration in a wet year (2003), and 82 % in a dry year (2004). In the investigated mesoscale catchment 23 % and 11 % of annual rainfall end up as surface run-off in a wet year and a dry year, respectively. Approximately 40 % of surface run-off consists of interflow, while the main fraction is direct run-off. Base flow from groundwater is negligible. Groundwater flow in the regolith aquifer is modeled with Visual Modflow, assuming average hydraulic conductivities as determined by pumping test evaluation. The model calculatesthat only about 5 % of groundwater recharge leaves the basin as groundwater flow. This is evidence that the regolith aquifer does not contribute to a large extent to regional groundwater flow. Leakage to localized zones of high hydraulic conductivity of the fracture aquifer, which underlies the regolith aquifer, could act as a main sink of groundwater recharge. However, the exact location and hydraulic properties of fracture zones are largely unknown, so that the flux from the regolith aquifer to these fractures as well as the amount of flow through fractures is impossible to estimate at present. Pumping tests with observation wells to assess the specific yield, long-term pumping test at the basin outlet and a continuation of groundwater hydrograph recording at high temporal resolution could largely enhance the knowledge of hydraulic properties in the future. The groundwater model could then be improved and extended to gain certainty on the characteristics of groundwater flow.