Your search found 15 records
1 Cofie, O.; Drechsel, P.; Obuobie, E.; Danso, G.; Keraita, B. 2003. Environmental sanitation and urban agriculture in Ghana. In Harvey, P. (Ed.). Proceedings of the 29th WEDC International Conference on Towards the Millennium Development Goals, Abuja, Nigeria, 22-26 September 2003. Leicestershire, UK: Water, Engineering and Development Centre (WEDC). pp.87-90.
(Location: IWMI-HQ Call no: IWMI 631.7.5 G200 COF Record No: H033176)
http://wedc.lboro.ac.uk/resources/conference/29/Cofie.pdf?TARGET=_blank
https://vlibrary.iwmi.org/pdf/H033176.pdf
https://vlibrary.iwmi.org/pdf/H033176.pdf
(0.08 MB) (77.71KB)
2 Obuobie, E.; Danso, G.; Drechsel, P. 2003. Access to land and waters for urban vegetable farming in Accra. Urban Agriculture Magazine, 11:15-17.
(Location: IWMI-HQ Call no: IWMI 631.7.2 G200 OBU Record No: H033903)
http://www.ruaf.org/sites/default/files/Access%20to%20Land%20and%20Water%20for%20Urban%20Vegetable%20Farming%20in%20Accra.pdf
https://vlibrary.iwmi.org/pdf/H_33903.pdf
https://vlibrary.iwmi.org/pdf/H_33903.pdf
(128.33 KB)
3 Forkuor, Gerald; Pavelic, Paul; Asare, E.; Obuobie, E.. 2013. Modelling potential areas of groundwater development for agriculture in northern Ghana using GIS/RS. Hydrological Sciences Journal, 58(2):437-451. [doi: https://doi.org/10.1080/02626667.2012.754101]
Groundwater development ; Water availability ; Water levels ; Agriculture ; GIS ; Remote sensing ; Models ; Sedimentary materials ; Recharge ; Aquifers ; Hydrogeology ; Maps / Ghana
(Location: IWMI HQ Call no: e-copy only Record No: H045707)
http://www.tandfonline.com/doi/pdf/10.1080/02626667.2012.754101
https://vlibrary.iwmi.org/pdf/H045707.pdf
https://vlibrary.iwmi.org/pdf/H045707.pdf
(2.32 MB) (2.31MB)
Groundwater development potential in northern Ghana (108 671 km2) has been assessed by combining spatial layers for five critical factors—recharge rate, regolith thickness, transmissivity, borehole success rate and static water level—through a multi-criteria analysis approach to rank development potential from the viewpoint of groundwater availability and accessibility at a resolution of 1 km2. The results indicate a high potential for development in the study area, as about 70% of the area was found to have high to moderate groundwater availability, while 83% has high to medium groundwater accessibility. Comparing the two main hydrogeological environments, the Precambrian Basement rocks (PCB) area was found to generally have a higher groundwater development potential than the Voltaian Sedimentary rocks (VSB). More detailed investigation revealed that the VSB can produce a small proportion of exceptionally high-yielding boreholes that can support large-scale irrigation. A test of the reliability of results showed that generally, the majority of high- and low-yielding boreholes fall in areas predicted by the model as having high and low groundwater availability, respectively.
4 Danso, G.; Drechsel, Pay; Obuobie, E.; Forkuor, G.; Kranjac-Berisavljevic, G. 2014. Urban vegetable farming sites, crops and cropping practices. In Drechsel, Pay; Keraita, B. (Eds.) Irrigated urban vegetable production in Ghana: characteristics, benefits and risk mitigation. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.7-27.
Vegetables ; Crops ; Irrigated farming ; Urban agriculture ; Farmland ; Farmers ; Maize / Ghana / Kumasi / Accra / Tamale / Cape Coast / Sekondi Takorad / Techiman
(Location: IWMI HQ Call no: IWMI Record No: H046599)
(2.59 MB)
The chapter describes the major sites of open-space vegetable farming in Ghana’s main cities. It also presents the principal cropping systems and characteristics of urban farmers involved in irrigated vegetable production.
5 Obuobie, E.; Hope, L. 2014. Characteristics of urban vegetable farmers and gender issues. In Drechsel, Pay; Keraita, B. (Eds.) Irrigated urban vegetable production in Ghana: characteristics, benefits and risk mitigation. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.28-37.
Vegetables ; Farmers ; Gender ; Women ; Males ; Urban agriculture ; Households ; Income ; Retail marketing ; Wholesale marketing / Ghana / Accra / Kumasi / Tamale
(Location: IWMI HQ Call no: IWMI Record No: H046600)
(96 KB)
This chapter presents a profile of farmers and sellers of irrigated urban produce and related gender issues. It explains why men dominate irrigated vegetable production and women vegetable retail.
6 Obuobie, E.; Keraita, B.; Hope, L.; Agodzo, S. K. 2014. Health risk perceptions of stakeholders in irrigated urban vegetable farming. In Drechsel, Pay; Keraita, B. (Eds.) Irrigated urban vegetable production in Ghana: characteristics, benefits and risk mitigation. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.116-135.
Urban agriculture ; Irrigated farming ; Irrigation water ; Wastewater irrigation ; Vegetable growing ; Health hazards ; Stakeholders ; Farmers ; Surveys / Ghana / Accra / Kumasi / Tamale
(Location: IWMI HQ Call no: IWMI Record No: H046607)
(295 KB)
This chapter presents a compilation of survey results on perceptions of urban vegetable farmers, traders and consumers, and of local authorities/officials on urban open-space vegetable farming in general and irrigation with polluted water sources in particular. Information presented is based on surveys conducted in 2002 to 2003 and 2005 to 2006 involving over 1,000 vegetable consumers, 150 vegetable sellers, 24 city officials and over 140 farmers in Accra, Kumasi and Tamale. Reviews from other related literature have also been included.
7 Drechsel, Pay; Obuobie, E.; Adam-Bradford, A.; Cofie, Olufunke O. 2014. Governmental and regulatory aspects of irrigated urban vegetable farming in Ghana and options for its institutionalization. In Drechsel, Pay; Keraita, B. (Eds.) Irrigated urban vegetable production in Ghana: characteristics, benefits and risk mitigation. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.199-218.
Urban agriculture ; Irrigated farming ; Vegetable growing ; Institutionalization ; Legal aspects ; Regulations ; Government agencies ; Wastewater management ; Food quality ; Food safety / Ghana
(Location: IWMI HQ Call no: IWMI Record No: H046612)
(476.59 KB)
This chapter examines key institutional issues that are important to the recognition and sustainability of irrigated vegetable farming in Ghanaian cities. It assesses the informal nature of the business and examines current roles being played by relevant agencies directly or indirectly linked to urban vegetable farming and urban wastewater management. The chapter also looks at relevant bylaws, strategies and policies that have implications for the recognition of informal irrigation and/or the adoption of safety measures for risk reduction in irrigated vegetable farming. It also suggests options to facilitate the institutionalization of irrigated urban agriculture.
8 Mul, Marloes; Obuobie, E.; Appoh, Richard; Kankam-Yeboah, K.; Bekoe-Obeng, E.; Amisigo, B.; Logah, F. Y.; Ghansah, Benjamin; McCartney, Matthew. 2015. Water resources assessment of the Volta River Basin. Colombo, Sri Lanka: International Water Management Institute (IWMI) 78p. (IWMI Working Paper 166) [doi: https://doi.org/10.5337/2015.220]
Water resources ; Environmental impact assessment ; River basins ; International waters ; Water management ; Water governance ; Water quality ; Water use ; Water demand ; Water power ; Water availability ; Ecosystem services ; Natural resources ; Infrastructure ; Wetlands ; Lakes ; Dams ; Policy making ; Strategies ; Livestock ; Fishing ; Industry ; Geology ; Soils ; Sedimentation ; Land use ; Hydrology ; Energy generation ; Riparian zones ; Institutions ; Economic aspects / Ghana / Burkina Faso / Volta River Basin
(Location: IWMI HQ Call no: IWMI Record No: H047413)
(2 MB)
The ‘WISE-UP to climate’ project aims to demonstrate the value of natural infrastructure as a ‘nature-based solution’ for climate change adaptation and sustainable development. Within the Volta River Basin, both natural and built infrastructure provide livelihood benefits for people. Understanding the interrelationships between the two types of infrastructure is a prerequisite for sustainable water resources development and management. This is particularly true as pressures on water resources intensify and the impacts of climate change increase. This report provides an overview of the biophysical characteristics, ecosystem services and links to livelihoods within the basin.
9 Mul, Marloes; Obuobie, E.; Appoh, Richard; Kankam-Yeboah, K.; Bekoe-Obeng, E.; Amisigo, B.; Logah, F. Y.; Ghansah, Benjamin; McCartney, Matthew. 2015. Evaluation des ressources en eau du bassin de la Volta. In French. [Water resources assessment of the Volta River Basin]. Colombo, Sri Lanka: International Water Management Institute (IWMI) 84p. (Also in English) (IWMI Working Paper 166/Document de travail IWMI 166) [doi: https://doi.org/10.5337/2016.201]
Water resources ; Environmental impact assessment ; River basins ; International waters ; Water management ; Water governance ; Water quality ; Water use ; Water demand ; Water power ; Water availability ; Ecosystem services ; Natural resources ; Infrastructure ; Wetlands ; Lakes ; Dams ; Policy making ; Strategies ; Livestock ; Fishing ; Industry ; Geology ; Soils ; Sedimentation ; Land use ; Hydrology ; Energy generation ; Riparian zones ; Institutions ; Economic aspects / Ghana / Burkina Faso / Volta River Basin
(Location: IWMI HQ Call no: IWMI Record No: H047580)
(24 KB)
Le projet « WISE UP to climate » vise a demontrer l'utilite des infrastructures naturelles comme une « solution basee sur la nature » pour l'adaptation au changement climatique et le developpement durable. Dans le bassin de la Volta, les infrastructures naturelles, comme les construites, offrent des benefices pour la subsistance des personnes. Comprendre les interrelations entre ces deux types d'infrastructures est une condition indispensable a une gestion et un developpement durables des ressources en eau. Cela est particulierement vrai dans un contexte ou les pressions sur les ressources en eau s'intensifient, et ou les impacts du changement climatique augmentent. Ce rapport donne un apercu des caracteristiques biophysiques, des services ecosystemiques, et de leur relation avec les moyens de subsistance dans le bassin.
10 Obuobie, E.; Barry, B.; Agyekum, W. 2016. Groundwater resources of the Volta Basin. In Williams, Timothy O.; Mul, Marloes L.; Biney, C. A.; Smakhtin, Vladimir (Eds.). The Volta River Basin: water for food, economic growth and environment. Oxon, UK: Routledge - Earthscan. pp.46-61.
Groundwater extraction ; Groundwater recharge ; Groundwater irrigation ; Surface water ; Water quality ; Drinking water ; Domestic water ; Water supply ; Water availability ; Water use ; Irrigated farming ; Aquifers / West Africa / Benin / Burkina Faso / Ivory Coast / Ghana / Mali / Togo / Volta River Basin
(Location: IWMI HQ Call no: IWMI Record No: H047724)
11 Kadyampakeni, Davie M.; Mul, Marloes L.; Obuobie, E.; Appoh, Richard; Owusu, Afua; Ghansah, Benjamin; Boakye-Acheampong, Enoch; Barron, Jennie. 2017. Agro-climatic and hydrological characterization of selected watersheds in northern Ghana. Colombo, Sri Lanka: International Water Management Institute (IWMI). 40p. (IWMI Working Paper 173) [doi: https://doi.org/10.5337/2017.209]
Watersheds ; Agricultural production ; Intensification ; Agroclimatology ; Hydrology ; Analytical method ; Agronomic practices ; Water balance ; Water quality ; Water management ; Water deficit ; Climatic factors ; pH ; Electrical conductivity ; Soil texture ; Soil quality ; Soil sampling ; Soil fertility ; Land cover mapping ; Land use ; Rain ; Temperature ; Evapotranspiration ; Farmers ; Wet season ; Dry season ; Reservoir storage ; Wells ; Rivers ; Irrigation schemes ; Catchment areas ; Cropping systems ; Crop production ; Meteorological stations ; Cation exchange capacity / Ghana
(Location: IWMI HQ Call no: IWMI Record No: H048209)
(1 MB)
This paper provides the climatic and biophysical context of three watersheds in northern Ghana. The objective of the study is to describe the agro-climatic and hydrological features of the watersheds from a landscape perspective. The analyses show that water surplus occurs about 3 months in a year, with only one month providing a significant surplus. Small-scale irrigation is, therefore, carried out in the dry months between November and June. The quality of water used for irrigation from wells, reservoirs and rivers is good for irrigation and domestic purposes. The soil chemical parameters across the study sites show that the soils are suitable for irrigation and crop system intensification, although it requires substantial fertilizer inputs. The paper concludes that there are opportunities from both a soil quality and water availability perspective to enhance sustainable intensification through small- and medium-scale irrigation in the selected watersheds.
12 Mul, Marloes; Pettinotti, L.; Amonoo, Naana Adwoa; Bekoe-Obeng, E.; Obuobie, E.. 2017. Dependence of riparian communities on ecosystem services in northern Ghana. Colombo, Sri Lanka: International Water Management Institute (IWMI). 43p. (IWMI Working Paper 179) [doi: https://doi.org/10.5337/2018.201]
Ecosystem services ; Riparian zones ; Communities ; Participatory rural appraisal ; Socioeconomic environment ; Living standards ; Mapping ; Seasonality ; Natural resources ; Infrastructure ; Forest reserves ; Shrubs ; Woodlands ; Water storage ; Ponds ; Dams ; River basins ; Stream flow ; Floodplains ; Household consumption ; Domestic consumption ; Gender ; Climate change ; Rain ; Dry season ; Food security ; Income ; Agriculture / Ghana
(Location: IWMI HQ Call no: IWMI Record No: H048466)
(1 MB)
This study investigated the dependence of three riparian communities on ecosystem services in northern Ghana. Participatory mapping and ranking exercises in gender-segregated groups were used to elicit information on the communities’ livelihoods. The most important ecosystem-based activities (EBA) are farming, fishing, livestock watering and grazing, collection of wild fruits and vegetables, and provision of water for domestic use. The major EBA are dependent on the seasonal flows of the White Volta River, which are under pressure due to climatic and other anthropogenic changes. For example, observed delays in the start of the rainy season are affecting rainfed agricultural activities on the floodplains. Delayed planting on the floodplains results in damage to, or loss of, crops as floods arrive before the harvest. Moreover, the Bagré Dam in Burkina Faso, built upstream of the communities, has impacted the natural river flow. The planned Pwalugu Dam may, depending on the final operations, support or affect EBA. We, therefore, recommend that operations of the Pwalugu Dam should take into consideration the flow requirements of EBA downstream of the dam.
13 Logah, F. Y.; Amisigo, A. B.; Obuobie, E.; Kankam-Yeboah, K. 2017. Floodplain hydrodynamic modelling of the lower Volta River in Ghana. Journal of Hydrology: Regional Studies, 14:1-9. [doi: https://doi.org/10.1016/j.ejrh.2017.09.002]
Floodplains ; Hydrodynamics ; Models ; Rivers ; Stream flow ; Sediment ; Geomorphology ; Dams ; Downstream ; Communities ; Living standards / Ghana / Lower Volta River / Akosombo Dam / Kpong Dam
(Location: IWMI HQ Call no: e-copy only Record No: H048495)
https://www.sciencedirect.com/science/article/pii/S2214581817301635/pdfft?md5=8175e1742b62ee768daad95eae85209a&pid=1-s2.0-S2214581817301635-main.pdf
https://vlibrary.iwmi.org/pdf/H048495.pdf
https://vlibrary.iwmi.org/pdf/H048495.pdf
(1.16 MB) (1.16 MB)
The impacts of dam releases from re-operation scenarios of the Akosombo and Kpong hydropower facilities on downstream communities along the Lower Volta River were examined through hydrodynamic modelling using the HEC-RAS hydraulic model. The model was used to simulate surface water elevation along the river reach for specified discharge hydrographs from proposed re-operation dam release scenarios. The morphology of the river and its flood plains together with cross-sectional profiles at selected river sections were mapped and used in the hydrodynamic modelling. In addition, both suspended and bed-load sediment were sampled and analysed to determine the current sediment load of the river and its potential to carry more sediment. The modelling results indicate that large areas downstream of the dam including its flood plains would be inundated if dam releases came close to or exceeded 2300 m3 /s. It is therefore recommended to relocate communities along the banks and in the flood plains of the Lower Volta River when dam releases are to exceed 2300 m3 /s. Suspended sediment transport was found to be very low in the Lower Volta River and the predominant soil type in the river banks and bed is sandy soil. Thus, the geomorphology of the river can be expected to change considerably with time, particularly for sustained high releases from the Akosombo and Kpong dams. The results obtained from this study form a basis for assessing future sedimentation problems in the Lower Volta River and for underpinning the development of sediment control and management strategies for river basins in Ghana.
14 Gonzalez, J. M.; Matrosov, E. S.; Obuobie, E.; Mul, M.; Pettinotti, L.; Gebrechorkos, S. H.; Sheffield, J.; Bottacin-Busolin, A.; Dalton, J.; Smith, D. Mark; Harou, J. J. 2021. Quantifying cooperation benefits for new dams in transboundary water systems without formal operating rules. Frontiers in Environmental Science, 9:596612. [doi: https://doi.org/10.3389/fenvs.2021.596612]
Dams ; International waters ; Water systems ; International cooperation ; Infrastructure ; River basins ; Reservoir operation ; Water policies ; Hydropower ; Ecosystem services ; Environmental flows ; Irrigation ; Simulation models / Ghana / Volta River Basin / Pwalugu Multipurpose Dam
(Location: IWMI HQ Call no: e-copy only Record No: H050729)
https://www.frontiersin.org/articles/10.3389/fenvs.2021.596612/pdf
https://vlibrary.iwmi.org/pdf/H050729.pdf
https://vlibrary.iwmi.org/pdf/H050729.pdf
(9.16 MB) (9.16 MB)
New dams impact downstream ecosystems and water infrastructure; without cooperative and adaptive management, negative impacts can manifest. In large complex transboundary river basins without well codified operating rules and extensive historical data, it can be difficult to assess the benefits of cooperating, in particular in relation to new dams. This constitutes a barrier to harmonious development of river basins and could contribute to water conflict. This study proposes a generalised framework to assess the benefits of cooperation on the management of new dams in water resource systems that do not have formal sharing arrangements. Benefits are estimated via multi-criteria comparison of historical reservoir operations (usually relatively uncooperative) vs. adopting new cooperative rules which would achieve the best results for riparian countries as evaluated by a water resources simulator and its performance metrics. The approach is applied to the Pwalugu Multipurpose Dam (PMD), which is being built in Ghana in the Volta river basin. The PMD could impact downstream ecosystems and infrastructure in Ghana and could itself be impacted by how the existing upstream Bagre Dam is managed in Burkina Faso. Results show that with cooperation Ghana and Burkina Faso could both increase energy production although some ecosystem services loss would need to be mitigated. The study confirms that cooperative rules achieve higher overall benefits compared to seeking benefits only for individual dams or countries.
15 Akpoti, Komlavi; Dembele, Moctar; Forkuor, G.; Obuobie, E.; Mabhaudhi, Tafadzwanashe; Cofie, Olufunke. 2023. Integrating GIS and remote sensing for land use/land cover mapping and groundwater potential assessment for climate-smart cocoa irrigation in Ghana. Scientific Reports, 13:16025. [doi: https://doi.org/10.1038/s41598-023-43286-5]
Climate-smart agriculture ; Cocoa ; Groundwater irrigation ; Land-use mapping ; Land cover mapping ; Groundwater potential ; Groundwater assessment ; Geographical information systems ; Remote sensing ; Surface water ; Water availability ; Climate change / Ghana
(Location: IWMI HQ Call no: e-copy only Record No: H052236)
(12.00 MB) (12.0 MB)
Although Ghana is a leading global cocoa producer, its production and yield have experienced declines in recent years due to various factors, including long-term climate change such as increasing temperatures and changing rainfall patterns, as well as drought events. With the increasing exposure of cocoa-producing regions to extreme weather events, the vulnerability of cocoa production is also expected to rise. Supplemental irrigation for cocoa farmers has emerged as a viable adaptation strategy to ensure a consistent water supply and enhance yield. However, understanding the potential for surface and groundwater irrigation in the cocoa-growing belt remains limited. Consequently, this study aims to provide decision-support maps for surface and groundwater irrigation potential to aid planning and investment in climate-smart cocoa irrigation. Utilizing state-of-the-art geospatial and remote sensing tools, data, and methods, alongside in-situ groundwater data, we assess the irrigation potential within Ghana's cocoa-growing areas. Our analysis identified a total area of 22,126 km2 for cocoa plantations and 125.2 km2 for surface water bodies within the cocoa-growing regions. The multi-criteria analysis (MCA) revealed that approximately 80% of the study area exhibits moderate to very high groundwater availability potential. Comparing the MCA output with existing borehole locations demonstrated a reasonable correlation, with about 80% of existing boreholes located in areas with moderate to very high potential. Boreholes in very high potential areas had the highest mean yield of 90.7 l/min, while those in low groundwater availability potential areas registered the lowest mean yield of 58.2 l/min. Our study offers a comprehensive evaluation of water storage components and their implications for cocoa irrigation in Ghana. While groundwater availability shows a generally positive trend, soil moisture and surface water have been declining, particularly in the last decade. These findings underline the need for climate-smart cocoa irrigation strategies that make use of abundant groundwater resources during deficit periods. A balanced conjunctive use of surface and groundwater resources could thus serve as a sustainable solution for maintaining cocoa production in the face of climate change.
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