Your search found 6 records
1 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.
2 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.
3 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.
4 Owusu, Seth; Mul, Marloes L.; Ghansah, Benjamin; Osei-Owusu, P. K.; Awotwe-Pratt, V.; Kadyampakeni, D. 2017. Assessing land suitability for aquifer storage and recharge in northern Ghana using remote sensing and GIS multi-criteria decision analysis technique. Modeling Earth Systems and Environment, 3(4):1383-1393. [doi: https://doi.org/10.1007/s40808-017-0360-6]
Land suitability ; Aquifers ; Artificial recharge ; Remote sensing ; GIS ; Decision support systems ; Irrigation ; Rainfed farming ; Agricultural productivity ; Agricultural sector ; Water storage ; Water management ; Socioeconomic environment ; Farmers / Ghana
(Location: IWMI HQ Call no: e-copy only Record No: H048246)
https://link.springer.com/content/pdf/10.1007%2Fs40808-017-0360-6.pdf
https://vlibrary.iwmi.org/pdf/H048246.pdf
https://vlibrary.iwmi.org/pdf/H048246.pdf
(9.23 MB)
Increasing climate variability and challenge in access to water pose major impediments to rainfed agricultural productivity. Extensive flooding of agricultural lands during the rainy season and lack of water during the 8-month long dry season affect the livelihood of the people in the northern Ghana, a situation that calls for better water management practices. The use of aquifer storage and recharge (ASR) based technique, helps to reduce flooding and improve access to water during the dry season; however such technology has specific requirements for successful implementation. This study assesses suitable areas for the technology in the northern Ghana terrain using multi criteria decision analysis (MCDA) in ArcGIS environment. The result suggests around 66% (48,516 km2) of the crop area in the northern Ghana available for the technology are within moderate to very high suitable sites, of which 44% (29,490 km2) fall into the high and very high suitable sites. This could imply high potential for the artificial groundwater storage system in northern Ghana given other conditions.
5 Mul, Marloes; Ofosu, E. A.; Mante, Y.; Ghansah, Benjamin; Annor, F. O.; Boateng-Gyimah, M. 2017. Defining restoration flow targets to restore ecological functions and livelihoods in the lower Volta Basin. In Ntiamoa-Baidu, Y.; Ampomah, B. Y.; Ofosu, E. A. (Eds.). Dams, development and downstream communities: implications for re-optimising the operations of the Akosombo and Kpong Dams in Ghana. Tema, Ghana: Digibooks Ghana Ltd. pp.185-209.
Ecological factors ; Living standards ; Environmental flows ; Dam construction ; River basins ; Ecosystem services ; Fisheries ; Dry season ; Wet season ; Aquatic weeds ; Groundwater ; Flooding ; Sediment ; Health ; Infrastructure ; Aquaculture ; Irrigation / Ghana / Volta Basin / Akosombo / Kpong Dams
(Location: IWMI HQ Call no: e-copy only Record No: H048403)
6 Owusu, Afua; Kagone, S.; Leh, Mansoor; Velpuri, Naga Manohar; Gumma, M. K.; Ghansah, Benjamin; Thilina-Prabhath, Paranamana; Akpoti, Komlavi; Mekonnen, Kirubel; Tinonetsana, Primrose; Mohammed, I. 2024. A framework for disaggregating remote-sensing cropland into rainfed and irrigated classes at continental scale. International Journal of Applied Earth Observation and Geoinformation, 126:103607. [doi: https://doi.org/10.1016/j.jag.2023.103607]
Farmland ; Remote sensing ; Irrigated farming ; Rainfed farming ; Frameworks ; Agricultural water management ; Land use ; Land cover ; Models ; Datasets / Africa
(Location: IWMI HQ Call no: e-copy only Record No: H052552)
https://www.sciencedirect.com/science/article/pii/S1569843223004314/pdfft?md5=83620252268d54a0c1e63640065278cd&pid=1-s2.0-S1569843223004314-main.pdf
https://vlibrary.iwmi.org/pdf/H052552.pdf
https://vlibrary.iwmi.org/pdf/H052552.pdf
(11.90 MB) (11.9 MB)
Agriculture consumes the largest share of freshwater globally; therefore, distinguishing between rainfed and irrigated croplands is essential for agricultural water management and food security. In this study, a framework incorporating the Budyko model was used to differentiate between rainfed and irrigated cropland areas in Africa for eight remote sensing landcover products and a high-confidence cropland map (HCCM). The HCCM was generated for calibration and validation of the crop partitioning framework as an alternative to individual cropland masks which exhibit high disagreement. The accuracy of the framework in partitioning the HCCM was evaluated using an independent validation dataset, yielding an overall accuracy rate of 73 %. The findings of this study indicate that out of the total area covered by the HCCM (2.36 million km2 ), about 461,000 km2 (19 %) is irrigated cropland. The partitioning framework was applied on eight landcover products, and the extent of irrigated areas varied between 19 % and 30 % of the total cropland area. The framework demonstrated high precision and specificity scores, indicating its effectiveness in correctly identifying irrigated areas while minimizing the misclassification of rainfed areas as irrigated. This study provides an enhanced understanding of rainfed and irrigation patterns across Africa, supporting efforts towards achieving sustainable and resilient agricultural systems. Consequently, the approach outlined expands on the suite of remote sensing landcover products that can be used for agricultural water studies in Africa by enabling the extraction of irrigated and rainfed cropland data from landcover products that do not have disaggregated cropland classes.
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