Climatic impacts on water resources in a tropical catchment in Uganda and adaptation measures proposed by resident stakeholders.

Citation metadata

Date: Jan. 2021
From: Climatic Change(Vol. 164, Issue 1-2)
Publisher: Springer
Document Type: Report; Brief article
Length: 314 words

Document controls

Main content

Abstract :

Keywords: Lake Bunyonyi; Ruhezamyenda; Climate change adaptation; COSERO; Hydrological modelling; Stakeholder workshop Abstract The Ruhezamyenda catchment in Uganda includes a unique lake, Lake Bunyonyi, and is threatened by increasing social and environmental pressures. The COSERO hydrological model was used to assess the impact of climate change on future surface runoff and evapotranspiration in the Lake Bunyonyi catchment (381 km.sup.2). The model was forced with an ensemble of CMIP5 global climate model (GCM) simulations for the mid-term future (2041--2070) and for the far future (2071--2100), each with RCP4.5 and RCP8.5. In the Ruhezamyenda catchment, compared to 1971--2000, the median of all GCMs (for both RCPs) showed the mean monthly air temperature to increase by approximately 1.5 to 3.0 °C in the mid-term future and by roughly 2.0 to 4.5 °C in the far future. The mean annual precipitation is generally projected to increase, with future changes between -25 and +75% (RCP8.5). AET in the Lake Bunyonyi catchment was simulated to increase for the future by approximately +8 mm/month in the median of all GCMs for RCP8.5 for the far future. The runoff for future periods showed much uncertainty, but with an overall increasing trend. A combination of no-regrets adaptation options in the five categories of: governance communication and capacity development water, soil, land management and livelihoods improvement data management and research, was identified and validated with stakeholders, who also identified additional adaptation actions based on the model results. This study contributes to improving scientific knowledge on the impacts of climate change on water resources in Uganda with the purpose to support adaptation. Author Affiliation: (1) University of Natural Resources and Life Sciences, Vienna (BOKU), Institute for Hydrology and Water Management, Vienna, Austria (2) International Institute for Sustainable Development (IISD), Secretariat for the NAP Global Network, Winnipeg, Manitoba, Canada (a) bano.mehdi@boku.ac.at Article History: Registration Date: 01/05/2021 Received Date: 04/28/2020 Accepted Date: 01/05/2021 Online Date: 01/20/2021 Byline:

Source Citation

Source Citation   

Gale Document Number: GALE|A649299594