Hydrologic response to climate change in the Densu River Basin in Ghana

• Published in: Heliyon Vol. 6; no. 8; p. e04722
• Main Authors: Oti, Jonathan Opoku, Kabo-bah, Amos T., Ofosu, Eric
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2020; Elsevier
• Subjects: Climate change; Climatology; CORDEX experiment; Earth-surface processes; Environmental impact assessment; Hydrology; Rainfall; Temperature; Water evaluation and planning (WEAP); Climatology; Climate change; Earth-surface processes; Hydrology; Water evaluation and planning (WEAP); Environmental impact assessment; Temperature; CORDEX experiment; Rainfall
• ISSN: 2405-8440; 2405-8440
• DOI: 10.1016/j.heliyon.2020.e04722

Climate change continues to pose a threat to the sustainability of water resources. Global warming can have several effects on the water resources and water demands in the Densu River Basin especially household water use and agriculture use among several others. However, the extents to which the hydrology of the Densu River Basin is will be altered in the future remains unknown. In this research, the Water Evaluation and Planning (WEAP21) system was used to study the impacts of future climate change on water resources in the Densu River Basin. Future climate data (rainfall and temperature) for the period 2051–2080 was generated from the Swedish Meteorological and Hydrological Institute's climate models (ICHEC-EC-EARTH and RCA4) for RCP4.5 scenario under CORDEX experiment. The results of the study indicate that the Densu River Basin will experience a temperature increase by 8.23% and a 17% reduction in rainfall resulting in 58.3% reduction in water resources in the area. The climate change impact analysis indicates a reduction in the river streamflow due to decrease in rainfall. It is recommended that future research on climate change adaptation for water management in the Densu River Basin should be conducted. Climatology; Climate change; Environmental impact assessment; Earth-surface processes; Hydrology; Rainfall; Temperature; Water evaluation and planning (WEAP); CORDEX experiment.