Inventory of water storage types in the Blue Nile and Volta River Basins

Water storage / River basins / Reservoirs / Ponds / Tanks / Groundwater / Soil moisture / Wetlands

Assessment of the Quality of Shallow Groundwater for Irrigation in the Atankwidi Sub-Basin of the White Volta Basin, Ghana

The potential use of shallow groundwater for small-scale dry season irrigation is a key issue for irrigation development in the arid zone of Ghana. Farmers within the Atankwidi sub-basin of the White Volta Basin are increasingly adopting groundwater as a source of irrigation water due to the unavailability of surface water during the dry season. However the quality of the groundwater and its suitability for irrigation is not known, hence the need to assess the quality and its suitability in order to ensure sustainability in the application and possible expansion of groundwater irrigation in the area. Two main water types (Ca-Mg-HCO3 and Na-Mg-Ca-HCO3) have been determined using the Piper diagram. The relative abundance of cations in the groundwater was found to be in the decreasing order of Na+ > Ca2+ > K+ > Mg2+ > Fe2+. Similarly, that of anions was found to have a decreasing order of HCO3- > SO42- > Cl- > PO42- > NO3- > F-. Groundwater in the area had low SAR and low to medium salinity hazard. However, magnesium hazard and alkalinity problems are likely to limit its use for irrigation. Keywords: Shallow Groundwater, Hydrochemical facies, Irrigation Water Quality

Smallholder shallow groundwater irrigation development in the upper east region of Ghana

In sub-Saharan Africa, there is paucity of information on the potential of groundwater resources. The limited available information paints a pessimistic view about groundwater resources. Due to its perceived inadequate availability, groundwater is associated with domestic use but the potential for using it for agriculture is not well reflected in the national irrigation policies. Contrary to official pessimism, farmers do use groundwater for agriculture in many countries of sub-Saharan Africa including Ghana. This paper analyzes the current extent of use, economics, socioeconomic impacts, and constraints and opportunities of shallow groundwater irrigation based on the experiences of smallholders in the three micro-watersheds of the White Volta Basin in the Upper East Region of Ghana

Water storage in an era of climate change: addressing the challenge of increasing rainfall variability. Blue paper

Water storage / Climate change / Rain / Dams / Reservoirs

Sustainable Use of Soils and Water: The Role of Environmental Land Use Conflicts

This book on the sustainable use of soils and water addressed a variety of issues related to the utopian desire for environmental sustainability and the deviations from this scene observed in the real world. Competing interests for land are frequently a factor in land degradation, especially where the adopted land uses do not conform with the land capability (the natural use of soil). The concerns of researchers about these matters are presented in the articles comprising this Special Issue book. Various approaches were used to assess the (im)balance between economic profit and environmental conservation in various regions, in addition to potential routes to bring landscapes back to a sustainable status being disclosed