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Journal articles on the topic 'Volta Basin'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Zakaria, Abdul-Razak, and Kenichi Matsui. "Assessing Awareness about Volta Basin Authority, Code of Conduct and Water Governance Challenges in the Volta Basin." International Journal of Environment, Agriculture and Biotechnology 6, no. 3 (2021): 059–68. http://dx.doi.org/10.22161/ijeab.63.6.

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2

Leemhuis, C., G. Jung, R. Kasei, and J. Liebe. "The Volta Basin Water Allocation System: assessing the impact of small-scale reservoir development on the water resources of the Volta basin, West Africa." Advances in Geosciences 21 (August 11, 2009): 57–62. http://dx.doi.org/10.5194/adgeo-21-57-2009.

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Abstract. In the Volta Basin, infrastructure watershed development with respect to the impact of climate conditions is hotly debated due to the lack of adequate tools to model the consequences of such development. There is an ongoing debate on the impact of further development of small and medium scale reservoirs on the water level of Lake Volta, which is essential for hydropower generation at the Akosombo power plant. The GLOWA Volta Project (GVP) has developed a Volta Basin Water Allocation System (VB-WAS), a decision support tool that allows assessing the impact of infrastructure development in the basin on the availability of current and future water resources, given the current or future climate conditions. The simulated historic and future discharge time series of the joint climate-hydrological modeling approach (MM5/WaSiM-ETH) serve as input data for a river basin management model (MIKE BASIN). MIKE BASIN uses a network approach, and allows fast simulations of water allocation and of the consequences of different development scenarios on the available water resources. The impact of the expansion of small and medium scale reservoirs on the stored volume of Lake Volta has been quantified and assessed in comparison with the impact of climate variability on the water resources of the basin.

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3

Lautze, Jonathan, Boubacar Barry, and Eva Youkhana. "Changing paradigms in volta basin water management: customary, national and transboundary." Water Policy 10, no. 6 (December 1, 2008): 577–94. http://dx.doi.org/10.2166/wp.2008.002.

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This paper examines water management policies and institutions in the Ghanaian and Burkinabe portions of the Volta basin of West Africa. The paper begins with a brief historical overview of political, cultural and environmental developments in the basin since the late 19th century. Customary approaches to water management in the Volta are described next, followed by colonial and post-colonial water management developments in Ghana and Burkina Faso. The interplay between customary and national water management institutions in the watershed is then analysed so as to understand how conditions changed as a result of national-level developments. The paper also examines transboundary developments in the Volta basin, and concludes with a discussion of some of the strengths and weaknesses of the different management approaches.

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4

Ferreira, Vagner G., Zheng Gong, and Samuel A. Andam-Akorful. "Monitoring mass changes in the Volta River basin using GRACE satellite gravity and TRMM precipitation." Boletim de Ciências Geodésicas 18, no. 4 (December 2012): 549–63. http://dx.doi.org/10.1590/s1982-21702012000400003.

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GRACE satellite gravity data was used to estimate mass changes within the Volta River basin in West African for the period of January, 2005 to December, 2010. We also used the precipitation data from the Tropical Rainfall Measurement Mission (TRMM) to determine relative contributions source to the seasonal hydrological balance within the Volta River basin. We found out that the seasonal mass change tends to be detected by GRACE for periods from 1 month in the south to 4 months in the north of the basin after the rainfall events. The results suggested a significant gain in water storage in the basin at reference epoch 2007.5 and a dominant annual cycle for the period under consideration for both in the mass changes and rainfall time series. However, there was a low correlation between mass changes and rainfall implying that there must be other processes which cause mass changes without rainfall in the upstream of the Volta River basin.

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5

Ofosu, E. A., P. van der Zaag, N. C. van de Giesen, and S. N. Odai. "Productivity of irrigation technologies in the White Volta basin." Physics and Chemistry of the Earth, Parts A/B/C 35, no. 13-14 (January 2010): 706–16. http://dx.doi.org/10.1016/j.pce.2010.07.005.

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6

Lemoalle, Jacques, and Devaraj de Condappa. "Farming systems and food production in the Volta Basin." Water International 35, no. 5 (November 4, 2010): 655–80. http://dx.doi.org/10.1080/02508060.2010.510793.

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7

Tonah, Steve. "Migration and Farmer-Herder Conflicts in Ghana’s Volta Basin." Canadian Journal of African Studies / Revue canadienne des études africaines 40, no. 1 (January 2006): 152–78. http://dx.doi.org/10.1080/00083968.2006.10751339.

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8

Kasei, Raymond, Bernd Diekkrüger, and Constanze Leemhuis. "Drought frequency in the Volta Basin of West Africa." Sustainability Science 5, no. 1 (December 9, 2009): 89–97. http://dx.doi.org/10.1007/s11625-009-0101-5.

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9

Obuobie, Emmanuel, Kwabena Kankam-Yeboah, Barnabas Amisigo, Yaw Opoku-Ankomah, and Deborah Ofori. "Assessment of vulnerability of river basins in Ghana to water stress conditions under climate change." Journal of Water and Climate Change 3, no. 4 (December 1, 2012): 276–86. http://dx.doi.org/10.2166/wcc.2012.030.

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The Falkenmark indicator was used to assess vulnerability of the White Volta (106,000 km2) and Pra (20,023 km2) river basins in Ghana to water stress under climate change for the periods 2006–2035 (representing the 2020s) and 2036–2065 (2050s). The indicator is a commonly used measure of water stress and defines thresholds of 1,700, 1,000 and 500 m3/capita/annum as water stress, water scarcity and absolute scarcity, respectively. Downscaled data from ensemble averages of two global climate models, ECHAM4 and CSIRO, were used to drive the Soil and Water Assessment Tool for estimation of basin surface water resources under climate change. The simulated water resources in the two basins showed significant reduction of 22% for 2020. Further reductions were estimated for 2050 (50% and 46% for the White Volta and Pra, respectively). Without climate change, the White Volta basin will attain water stress and water scarcity by 2020 and 2050, respectively; the Pra is already water stressed and expected to worsen to water scarcity by 2020 and absolute scarcity by 2050. Climate change will aggravate the conditions in both basins. Implementation of integrated water resources management and population control measures are recommended for sustainable use and management of water resources in both basins.

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10

Carney, John N., Colm J. Jordan, Christopher W. Thomas, Daniel J. Condon, Simon J. Kemp, and John A. Duodo. "Lithostratigraphy, sedimentation and evolution of the Volta Basin in Ghana." Precambrian Research 183, no. 4 (December 2010): 701–24. http://dx.doi.org/10.1016/j.precamres.2010.08.012.

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11

Hafeez, Mohsin, Marc Andreini, Jens Liebe, Jan Friesen, Andreas Marx, and Nick Van De Giesen. "Hydrological parameterization through remote sensing in Volta Basin, West Africa." International Journal of River Basin Management 5, no. 1 (March 2007): 49–56. http://dx.doi.org/10.1080/15715124.2007.9635305.

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12

Roy, Christopher D. "The Spread of Mask Styles in the Black Volta Basin." African Arts 20, no. 4 (August 1987): 40. http://dx.doi.org/10.2307/3336633.

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13

Braimoh, Ademola K., and Paul L. G. Vlek. "Land-Cover Change Analyses in the Volta Basin of Ghana." Earth Interactions 8, no. 21 (December 2004): 1–17. http://dx.doi.org/10.1175/1087-3562(2004)8<1:lcaitv>2.0.co;2.

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14

Komi, Kossi, Barnabas Amisigo, Bernd Diekkrüger, and Fabien Hountondji. "Regional Flood Frequency Analysis in the Volta River Basin, West Africa." Hydrology 3, no. 1 (February 6, 2016): 5. http://dx.doi.org/10.3390/hydrology3010005.

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15

Adjei, Kwaku Amaning, Liliang Ren, Emmanual Kwame Appiah-Adjei, Kwabena Kankam-Yeboah, and Albert Anning Agyapong. "Validation of TRMM Data in the Black Volta Basin of Ghana." Journal of Hydrologic Engineering 17, no. 5 (May 2012): 647–54. http://dx.doi.org/10.1061/(asce)he.1943-5584.0000487.

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16

Porter, Susannah M., Andrew H. Knoll, and Pascal Affaton. "Chemostratigraphy of Neoproterozoic cap carbonates from the Volta Basin, West Africa." Precambrian Research 130, no. 1-4 (April 2004): 99–112. http://dx.doi.org/10.1016/j.precamres.2003.10.015.

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17

Agyekum, Jacob, Thompson Annor, Benjamin Lamptey, Emmannuel Quansah, and Richard Yao Kuma Agyeman. "Evaluation of CMIP5 Global Climate Models over the Volta Basin: Precipitation." Advances in Meteorology 2018 (July 29, 2018): 1–24. http://dx.doi.org/10.1155/2018/4853681.

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A selected number of global climate models (GCMs) from the fifth Coupled Model Intercomparison Project (CMIP5) were evaluated over the Volta Basin for precipitation. Biases in models were computed by taking the differences between the averages over the period (1950–2004) of the models and the observation, normalized by the average of the observed for the annual and seasonal timescales. The Community Earth System Model, version 1-Biogeochemistry (CESM1-BGC), the Community Climate System Model Version 4 (CCSM4), the Max Planck Institute Earth System Model, Medium Range (MPI-ESM-MR), the Norwegian Earth System Model (NorESM1-M), and the multimodel ensemble mean were able to simulate the observed climatological mean of the annual total precipitation well (average biases of 1.9% to 7.5%) and hence were selected for the seasonal and monthly timescales. Overall, all the models (CESM1-BGC, CCSM4, MPI-ESM-MR, and NorESM1-M) scored relatively low for correlation (<0.5) but simulated the observed temporal variability differently ranging from 1.0 to 3.0 for the seasonal total. For the annual cycle of the monthly total, the CESM1-BGC, the MPI-ESM-MR, and the NorESM1-M were able to simulate the peak of the observed rainy season well in the Soudano-Sahel, the Sahel, and the entire basin, respectively, while all the models had difficulty in simulating the bimodal pattern of the Guinea Coast. The ensemble mean shows high performance compared to the individual models in various timescales.

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18

Engel, Stefanie, Maria Iskandarani, and Maria Del Pilar Useche. "Demand and supply of improved water in the Ghanaian Volta Basin." International Journal of River Basin Management 5, no. 1 (March 2007): 31–36. http://dx.doi.org/10.1080/15715124.2007.9635303.

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19

Laux, P., S. Wagner, A. Wagner, J. Jacobeit, A. Bárdossy, and H. Kunstmann. "Modelling daily precipitation features in the Volta Basin of West Africa." International Journal of Climatology 29, no. 7 (June 15, 2009): 937–54. http://dx.doi.org/10.1002/joc.1852.

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20

Nyarko, Benjamin K., Bernd Diekkrüger, Nick C. Van De Giesen, and Paul L. G. Vlek. "Floodplain wetland mapping in the White Volta River Basin of Ghana." GIScience & Remote Sensing 52, no. 3 (April 2015): 374–95. http://dx.doi.org/10.1080/15481603.2015.1026555.

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21

de Condappa, Devaraj, Anne Chaponnière, and Jacques Lemoalle. "A decision-support tool for water allocation in the Volta Basin." Water International 34, no. 1 (February 18, 2009): 71–87. http://dx.doi.org/10.1080/02508060802677861.

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22

Obahoundje, Salomon, Arona Diedhiou, Eric Antwi Ofosu, Sandrine Anquetin, Baptiste François, Julien Adounkpe, Ernest Amoussou, et al. "Assessment of Spatio-Temporal Changes of Land Use and Land Cover over South-Western African Basins and Their Relations with Variations of Discharges." Hydrology 5, no. 4 (October 10, 2018): 56. http://dx.doi.org/10.3390/hydrology5040056.

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West African basins play a vital role in the socio-economic development of the region. They are mostly trans-boundary and sources of different land use practices. This work attempts to assess the spatio-temporal land use and land cover changes over three South Western African basins (Volta, Mono and Sassandra basins) and their influence on discharge. The land use and land cover maps of each basin were developed for 1988, 2002 and 2016. The results show that all the studied basins present an increase in water bodies, built-up, agricultural land and a decline in vegetative areas. These increases in water bodies and land use are as a result of an increase in small reservoirs, of dugouts and of dam constructions. However, the decline in some vegetative clusters could be attributed to the demographic and socio-economic growth as expressed by the expansion of agriculture and urbanization. The basic statistical analysis of precipitation and discharge data reveals that the mean annual discharge varies much more than the total annual precipitation at the three basins. For instance, in the entire Volta basin, the annual precipitation coefficient of variation (CV) is 10% while the annual discharge CV of Nawuni, Saboba and Bui are 43.6%, 36.51% and 47.43%, respectively. In Mono basin, the annual precipitation CV is 11.5% while the Nangbeto and Athieme annual discharge CV are 37.15% and 46.60%, respectively. The annual precipitation CV in Sassandra basin is 7.64% while the annual discharge CV of Soubre and Dakpadou are 29.41% and 37%, respectively. The discharge varies at least three times much more than the precipitation in the studied basins. The same conclusion was found for all months except the driest months (December and January). We showed that this great variation in discharge is mainly due to land use and land cover changes. Beside the hydrological modification of the land use and land cover changes, the climate of the region as well as the water quality and availability and the hydropower generation may be impacted by these changes in land surfaces conditions. Therefore, these impacts should be further assessed to implement appropriate climate services and measures for a sustainable land use and water management.

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23

Jung, Gerlinde, Sven Wagner, and Harald Kunstmann. "Joint climate–hydrology modeling: an impact study for the data-sparse environment of the Volta Basin in West Africa." Hydrology Research 43, no. 3 (June 1, 2012): 231–48. http://dx.doi.org/10.2166/nh.2012.044.

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The Volta Basin in West Africa is a region sensitive to water shortage. Future climate conditions therefore may put additional stress on the competition for the scarce water resources between industry, agriculture, and households. For an investigation of the sensitivity of the hydrological regime to global climate change in the data-sparse and poorly gauged region of the Volta Basin, joint regional climate–hydrology simulations were performed. MM5 was used as a regional climate model to downscale two time slices of a global ECHAM4 simulation to a resolution of 9 km. These regional climate simulations were used to drive a physically based, distributed hydrological model at 1 km resolution. The performance of the model components and the joint model system was evaluated for different historical periods. Results show that discharge in the Volta Basin reacts highly sensitively to precipitation differences. The pronounced rainfall decrease at the beginning of the rainy season is not transferred to discharge changes. During the rainy season most of the surplus rainfall evaporates due to a strong increase in evaporation as a consequence of higher near-surface air temperatures. The average change signal in precipitation, as well as surface and subsurface hydrology variables, lies in most variables within the range of inter-annual variability, but regionally stronger signals are also observed.

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24

Amevenku, Francis Kizito Yaw, and Richard Kofi Asravor. "Income equality and household expenditure of fishers in the Volta Basin in Ghana." Journal of Agribusiness in Developing and Emerging Economies 9, no. 5 (October 14, 2019): 552–68. http://dx.doi.org/10.1108/jadee-03-2019-0030.

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Purpose The purpose of this paper is to examine the level of income inequality among fisher households in the four segments of the Volta Basin in Ghana and the determinants of small-scale fisher household welfare. Design/methodology/approach The paper investigates income inequality and the determinants of household consumption expenditure of fishers in the Volta Basin of Ghana using the Lorenz curve, Gini coefficient decomposition and the multiple linear regression technique. Findings The findings confirm the empirical evidence that households in the general downstream communities and their compatriots in the upstream communities were statistically different in terms of household characteristics and physical and social capital. Income inequality was highest among households in upstream communities but least amongst downstream communities. Livelihoods of the fishery households largely and strictly favored male households. Also, educational status was associated with higher levels of income which enormously help reduce food insecurity. Research limitations/implications The reliance on dummy variables might lead to omissions of revealed understated differences between households. Practical implications The study recommends that effort should be made to help increase fish production in the upstream communities. Furthermore, alternative sources of income should be introduced to households in the upstream so they do not become more disadvantaged by the construction of the dam. Originality/value The uniqueness of the paper is that it tries to estimate the impact of the construction of the dam on the Volta Basin by taking into consideration the effect of the construction of the dam on the upstream and downstream separately.

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25

Ahialey, E. K., B. K. Kortatsi, G. K. Anornu, E. A. Kaka, and G. Dartey. "Hydrogeochemical Processes Influencing Groundwater Quality in the Black Volta Basin of Ghana." Research Journal of Applied Sciences, Engineering and Technology 11, no. 9 (November 25, 2015): 975–82. http://dx.doi.org/10.19026/rjaset.11.2137.

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26

Shaibu, Salamatu, Samuel Nii Odai, Kwaku Amaning Adjei, Edward Matthew Osei, and Frank Ohene Annor. "Simulation of runoff for the Black Volta Basin using satellite observation data." International Journal of River Basin Management 10, no. 3 (September 2012): 245–54. http://dx.doi.org/10.1080/15715124.2012.679735.

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27

Stahl, Ann B. "Archaeological Insights into Aesthetic Communities of Practice in the Western Volta Basin." African Arts 46, no. 3 (September 2013): 54–67. http://dx.doi.org/10.1162/afar_a_00088.

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28

Amevenku, F. K. Y., R. K. Asravor, J. K. M. Kuwornu, and Xibin Zhang. "Determinants of livelihood strategies of fishing households in the volta Basin, Ghana." Cogent Economics & Finance 7, no. 1 (January 1, 2019): 1595291. http://dx.doi.org/10.1080/23322039.2019.1595291.

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29

Anane-Taabeah, Frimpong, and Hallerman. "Aquaculture-Mediated Invasion of the Genetically Improved Farmed Tilapia (Gift) into the Lower Volta Basin of Ghana." Diversity 11, no. 10 (October 2, 2019): 188. http://dx.doi.org/10.3390/d11100188.

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The need for improved aquaculture productivity has led to widespread pressure to introduce the Genetically Improved Farmed Tilapia (GIFT) strains of Nile tilapia (Oreochromis niloticus) into Africa. However, the physical and regulatory infrastructures for preventing the escape of farmed stocks into wild populations and ecosystems are generally lacking. This study characterized the genetic background of O. niloticus being farmed in Ghana and assessed the genetic effects of aquaculture on wild populations. We characterized O. niloticus collected in 2017 using mitochondrial and microsatellite DNA markers from 140 farmed individuals sampled from five major aquaculture facilities on the Volta Lake, and from 72 individuals sampled from the wild in the Lower Volta River downstream of the lake and the Black Volta tributary upstream of the lake. Our results revealed that two farms were culturing non-native O. niloticus stocks, which were distinct from the native Akosombo strain. The non-native tilapia stocks were identical to several GIFT strains, some of which showed introgression of mitochondrial DNA from non-native Oreochromis mossambicus. We also found that the non-native cultured tilapias have escaped into the wild and interbred with local populations, and also observed potentially admixed individuals on some farms. Our results highlight aquaculture as a vector in the spread of invasive non-native species and strains, and underscore the importance of genetic baseline studies to guide conservation planning for wild populations.

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30

Mahama, C. I., A. Koné, S. de la Rocque, R. De Deken, and S. Geerts. "Prediction of the distribution of Glossina tachinoides (Diptera: Glossinidae) in the Volta basin of northern Ghana." Bulletin of Entomological Research 95, no. 1 (February 2005): 63–67. http://dx.doi.org/10.1079/ber2004340.

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AbstractThe classification of a Landsat Thematic Mapper satellite image helped demonstrate prevailing habitat types and land use intensity in the Volta basin of the Northern Region of Ghana. A geo-referenced data layer comprising the capture results of a cross-sectional survey of Glossina tachinoides Westwood was over-laid on a data layer of habitat types within 500 m of either bank of the Volta river and its tributaries. An evaluation of the relationship between habitat types and the capture results of G. tachinoides suggested a strong preference of G. tachinoides for woodland, followed by shrubland, grassland and flood plains. The findings were used to classify the suitability of habitat types for G. tachinoides as ‘high’, ‘medium’ and ‘low’ and a prediction map for the distribution of G. tachinoides in the entire river network was produced. The usefulness of this method in estimating the potential distribution of G. tachinoides in an area of increasing agricultural expansion is discussed.

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31

Ayivor, Jesse Sey. "Access to reeds and mat making in the lower Volta basin of Ghana." Singapore Journal of Tropical Geography 35, no. 2 (July 2014): 197–212. http://dx.doi.org/10.1111/sjtg.12068.

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32

Dovie, Delali Benjamin K., and Raymond Abudu Kasei. "Hydro-climatic stress, shallow groundwater wells and coping in Ghana's White Volta basin." Science of The Total Environment 636 (September 2018): 1268–78. http://dx.doi.org/10.1016/j.scitotenv.2018.04.416.

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33

Awotwi, Alfred, Michael Asare Bediako, Emmanuel Harris, and Eric Kwabena Forkuo. "Water Quality Changes Associated with Cassava Production: Case Study of White Volta Basin." Heliyon 2, no. 8 (August 2016): e00149. http://dx.doi.org/10.1016/j.heliyon.2016.e00149.

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34

Nyarko, Benjamin Kofi. "Modeling Unsaturated Zone Water Movement in the Floodplain Wetlands of the Volta Basin." Environment and Natural Resources Research 10, no. 3 (July 1, 2020): 1. http://dx.doi.org/10.5539/enrr.v10n3p1.

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The unsaturated zone of floodplain wetlands in the White Volta River basin provides an inextricable link between basin hydrology and the sustenance of plant growth. The HYDRUS-1D model was used to derive water budgets and to estimate fluxes to understand the hydrological complexities of these wetland systems. The model result indicates Spatio-temporal variation in the volume of vertical fluxes. In 2005, the estimate for average simulated flux was 0.29 cm/month in June and 1.23 cm/month in July. Consequently, the hydraulic head increased from 138.94 m to 139.30 m for the period from June to July 2005. For all sample sites, the increase in hydraulic head occurs within July and October, coinciding with high surface water fluxes. From the calculated water balance, the average monthly estimate of bottom flux was 0.01 cm/month for 2004 and 1.1 cm/month for 2005. The flow through the unsaturated zone and discharging into the subsurface water system has a high dependency on both the soil structure and the volume of water infiltrating through the surface; the highest discharge is within the period of highest water input.

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35

Owusu, Kwadwo, Peter Waylen, and Youliang Qiu. "Changing rainfall inputs in the Volta basin: implications for water sharing in Ghana." GeoJournal 71, no. 4 (April 2008): 201–10. http://dx.doi.org/10.1007/s10708-008-9156-6.

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36

Baah-Kumi, Bernard, and Frank A. Ward. "Poverty mitigation through optimized water development and use: Insights from the Volta Basin." Journal of Hydrology 582 (March 2020): 124548. http://dx.doi.org/10.1016/j.jhydrol.2020.124548.

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37

Abubakari, Sulemana, Xiaohua Dong, Bob Su, Xiaonong Hu, Ji Liu, Yinghai Li, Tao Peng, Haibo Ma, Kai Wang, and Shijin Xu. "Modelling streamflow response to climate change in data-scarce White Volta River basin of West Africa using a semi-distributed hydrologic model." Journal of Water and Climate Change 10, no. 4 (June 14, 2018): 907–30. http://dx.doi.org/10.2166/wcc.2018.193.

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Abstract This study uses high resolution Climate Forecast System Reanalysis (CFSR), SWAT and two IPCC climate change (CC) scenarios (A1B and B1) combined with two general circulation models (GCMs) (HADCM3 and MPEH5) to evaluate impact of CC on streamflow in the White Volta basin of West Africa. The evaluation criteria (R2 and NSE > 0.70 and PBIAS within ±25%) during calibration and validation showed good simulation of the basin hydrology. Using average streamflow from 1979 to 2008 as a baseline, there were uncertainties over the sign of variation of annual streamflow in the 2020s. Annually, streamflow change is projected to be within −4.00% to +13.00% in the 2020s and +3.00% to +16.00% in the 2050s. Monthly streamflow changes for most months vary between −13.00% and +32.00%. A shift in monthly maximum streamflow from September to August is projected, while the driest months (December, January and February) show no change in the future. Based on the model results, the White Volta basin will likely experience an increase in streamflow by the mid-21st century. This would call for appropriate investment into cost-effective adaptive water management practices to cater for the likely impact of CC on the future hydrology of the basin.

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38

Douxchamps, S., A. Ayantunde, E. K. Panyan, K. Ouattara, A. Kaboré, N. Karbo, and B. Sawadogo. "Agricultural water management and livelihoods in the crop–livestock systems of the Volta Basin." Water Resources and Rural Development 6 (November 2015): 92–104. http://dx.doi.org/10.1016/j.wrr.2014.10.001.

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39

Andam-Akorful, S. A., V. G. Ferreira, J. L. Awange, E. Forootan, and X. F. He. "Multi-model and multi-sensor estimations of evapotranspiration over the Volta Basin, West Africa." International Journal of Climatology 35, no. 10 (November 27, 2014): 3132–45. http://dx.doi.org/10.1002/joc.4198.

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40

Terrasson, Isabelle, Myles J. Fisher, Winston Andah, and Jacques Lemoalle. "Yields and water productivity of rainfed grain crops in the Volta Basin, West Africa." Water International 34, no. 1 (February 18, 2009): 104–18. http://dx.doi.org/10.1080/02508060802666336.

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41

Obuobie, Emmanuel, Bernd Diekkrueger, William Agyekum, and Sampson Agodzo. "Groundwater level monitoring and recharge estimation in the White Volta River basin of Ghana." Journal of African Earth Sciences 71-72 (August 2012): 80–86. http://dx.doi.org/10.1016/j.jafrearsci.2012.06.005.

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42

Abungba, Joachim A., Deepak Khare, Santosh M. Pingale, Kwaku A. Adjei, Charles Gyamfi, and Samuel N. Odai. "Assessment of Hydro-climatic Trends and Variability over the Black Volta Basin in Ghana." Earth Systems and Environment 4, no. 4 (August 10, 2020): 739–55. http://dx.doi.org/10.1007/s41748-020-00171-9.

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Thiemig, Vera, Rodrigo Rojas, Mauricio Zambrano-Bigiarini, and Ad De Roo. "Hydrological evaluation of satellite-based rainfall estimates over the Volta and Baro-Akobo Basin." Journal of Hydrology 499 (August 2013): 324–38. http://dx.doi.org/10.1016/j.jhydrol.2013.07.012.

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Oguntunde, Philip G., Babatunde J. Abiodun, and Gunnar Lischeid. "Impacts of climate change on hydro-meteorological drought over the Volta Basin, West Africa." Global and Planetary Change 155 (August 2017): 121–32. http://dx.doi.org/10.1016/j.gloplacha.2017.07.003.

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Okafor, Gloria, Thompson Annor, Samuel Odai, and Jacob Agyekum. "Volta basin precipitation and temperature climatology: evaluation of CORDEX-Africa regional climate model simulations." Theoretical and Applied Climatology 137, no. 3-4 (January 24, 2019): 2803–27. http://dx.doi.org/10.1007/s00704-018-2746-4.

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Kortatsi, Benony Komla, Y. S. A. Anku, and G. K. Anornu. "Characterization and appraisal of facets influencing geochemistry of groundwater in the Kulpawn sub-basin of the White Volta Basin, Ghana." Environmental Geology 58, no. 6 (November 18, 2008): 1349–59. http://dx.doi.org/10.1007/s00254-008-1638-9.

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47

Adjei, Kwaku Amaning, Liliang Ren, Emmanuel Kwame Appiah-Adjei, and Samuel Nii Odai. "Application of satellite-derived rainfall for hydrological modelling in the data-scarce Black Volta trans-boundary basin." Hydrology Research 46, no. 5 (August 26, 2014): 777–91. http://dx.doi.org/10.2166/nh.2014.111.

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This study, conducted in the Black Volta basin of Ghana, determined how well TRMM Multi-Satellite Precipitation Analysis (TMPA) data compare with rain gauge measurements. The potential of using the TMPA data as inputs into a hydrological model for runoff simulation in a data-scarce basin was also assessed. Using a point-to-grid approach, accumulations of ground measured rainfall on daily, monthly and annual time scales were compared with accumulations derived from TMPA daily rainfall grids. The TMPA derived data together with other free global data were used as input into the soil and water assessment tool (SWAT) to set up a hydrological model for the basin. This model was calibrated and validated using streamflow data from a station located downstream of the basin. The study results showed a correlation from 0.85 to 0.92 for the monthly accumulated rainfall. Also, good Nash–Sutcliffe efficiencies of 0.94 and 0.67 were obtained for calibration and validation, respectively, on monthly scale. Moreover, simulation of streamflow was ‘satisfactory’ to ‘very good’ in terms of trends and residual variation. The study, therefore, shows that the use of satellite rainfall in the basin would be of great benefit considering the difficulties in accessing data across the basin.

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Sawai, Nobuhiko, Kenichiro Kobayashi, Apip, Kaoru Takara, Hirohiko Ishikawa, Muneta Yokomatsu, Subhajyoti Samaddar, Ayilari-Naa Juati, and Gordana Kranjac-Berisavljevic. "Impact of Climate Change on River Flows in the Black Volta River." Journal of Disaster Research 9, no. 4 (August 1, 2014): 432–42. http://dx.doi.org/10.20965/jdr.2014.p0432.

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This paper assesses the impact of climate change in the Black Volta River by using data output from the atmospheric general circulation model with a 20-km resolution (AGCM20) through the Japanese Meteorological Agency (JMA) and the Meteorological Research Institute (MRI). The Black Volta, which flows mainly in Burkina Faso and Ghana in West Africa, is a major tributary of the Volta River. The basin covers 142,056 km2 and has a semi-arid tropical climate. Before applying AGCM20 output to a rainfall–runoff model, the performance of the AGCM20 rainfall data is investigated by comparing it with the observed rainfall in the Black Volta Basin. To assess the possible impact of rainfall change on river flow, a kinematic wave model, which takes into consideration saturated and unsaturated subsurface soil zones, was performed. The rainfall analysis shows that, the correlation coefficient of the monthly rainfall between the observed rainfall and AGCM20 for the present climate (1979–2004) is 0.977. In addition, the analysis shows that AGCM20 overestimates precipitation during the rainy season and underestimates the dry season for the present climate. The analysis of the AGCM20 output shows the precipitation pattern change in the future (2075–2099). In the future, precipitation is expected to increase by 3%, whereas evaporation and transpiration are expected to increase by 5% and by 8%, respectively. Also, daily maximum rainfall is expected to be 20 mm, or 60%, higher. Thus, the future climate in this region is expected to be more severe. The rainfall–runoff simulation is successfully calibrated at the Bamboi discharge gauging station in the Black Volta fromJune 2000 to December 2000 with 0.72 of the Nash–Sutcliffe model efficiency index. The model is applied with AGCM20 outputs for the present climate (1979–2004) and future climate (2075–2099). The results indicate that future discharge will decrease from January to July at the rate of the maximum of 50% and increase fromAugust to December at the rate of the maximumof 20% in the future. Therefore, comprehensive planning for both floods and droughts are urgently needed in this region.

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Ewusi, A., and J. Seidu. "Efficacy of Geophysical Techniques for Groundwater Exploration in the Volta Basin, Northern Region of Ghana." Ghana Mining Journal 20, no. 1 (July 7, 2020): 11–19. http://dx.doi.org/10.4314/gm.v20i1.2.

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Abstract Groundwater, traditionally extracted from hand-dug wells and boreholes is the main drinking water source in the Northern Region of Ghana. Many boreholes have been constructed in the region to increase accessibility to potable water mainly as part of rural water supply projects where borehole siting has to be relatively cheaper. These projects have resulted in low success rates of borehole drilling because of the application of inefficient and simple geophysical techniques supposed to be cheaper. Field surveys were conducted with the Electrical Resistivity Imaging (ERI) technique, Electrokinetic System (EKS) sounding technique and Radon (222Rn) technique with the objectives of determining the best geophysical methods for borehole siting and its efficiency in the Volta Basin (VB) in the Northern Region of Ghana. The surveys were conducted at stations of existing dry and positive boreholes. Results show that the three geophysical techniques are efficient to identify groundwater accumulation zones. The ERI, EKS and 222Rn are efficient to identify discontinuities, calculate hydraulic conductivity of discontinuities and identify areas of water circulation respectively. It is recommended that the ERI be used to obtain discontinuities and weak zones for drilling on rural water supply projects in the VB. The EKS and 222Rn should be conducted to evaluate these features when high yield boreholes are required. Keywords: Geophysical Techniques, Volta Basin, Borehole Drilling, Success Rates

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Dhamelincourt, Marie-Claire, Marco Vecoli, Alberto Mezzetti, Christian Cesari, Gerard Versteegh, and Armelle Riboulleau. "Laser Raman micro-spectroscopy of Proterozoic and Palaeozoic organic-walled microfossils (acritarchs and prasinophytes) from the Ghadamis Basin, Libya and Volta Basin, Ghana." Spectroscopy 24, no. 3-4 (2010): 207–12. http://dx.doi.org/10.1155/2010/872050.

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Laser Raman microspectroscopy was used as a microchemical analysis technique to characterize the wall chemistry of organic-walled microfossils (acritarchs and prasinophytes) extracted from Proterozoic (Tonian: ca. 900 Myr) and early Palaeozoic (Silurian: ca. 420 Myr) marine sediments in the Volta Basin of Ghana, and the Ghadamis Basin of Libya, respectively. Raman spectra of Proterozoic acritarchs show spectral features characteristic of kerogenous compounds at ~1350 and ~1600 cm−1, consistently with previously published reports. In addition, spectra from prasinophyte algae from the Silurian sample also show an interesting spectral feature at ~1707 cm−1indicative of carbonyl moieties.Broadly speaking, shape and position of Raman bands appear to depend on the nature of the specimen considered, suggesting that laser micro-Raman analysis can potentially be used to establish phylogenetic relationships (high-rank taxonomy) among the main groups of pre-Cambrian to Palaeozoic palynomorphs.

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