Next Article in Journal
Relative Effect of Location Alternatives on Urban Hydrology. The Case of Greater Port-Harcourt Watershed, Niger Delta
Previous Article in Journal
Flood Hazard Analysis of Proposed Regulator on Shatt Al-Arab River
Open AccessArticle

Evaluation of the Impacts of Climate Change on Sediment Yield from the Logiya Watershed, Lower Awash Basin, Ethiopia

1
Hydraulic and Water Resources Engineering Department, Haramaya Institute of Technology (HiT), Haramaya University, P.O. Box 138 Dire Dawa, Ethiopia
2
Department of Hydraulic and Water Resources Engineering, Arba Minch Water Technology Institute, Arba Minch University, P.O. Box 21 Arba Minch, Ethiopia
3
Geoinformation Science Program, School of Geography and Environmental Studies, Haramaya University, P.O. Box 138 Dire Dawa, Ethiopia
4
Institute of Technology (AAiT), Addis Ababa University, Addis Ababa 385, Ethiopia
*
Author to whom correspondence should be addressed.
Hydrology 2019, 6(3), 81; https://doi.org/10.3390/hydrology6030081
Received: 28 June 2019 / Revised: 16 August 2019 / Accepted: 20 August 2019 / Published: 11 September 2019
It is anticipated that climate change will impact sediment yield in watersheds. The purpose of this study was to investigate the impacts of climate change on sediment yield from the Logiya watershed in the lower Awash Basin, Ethiopia. Here, we used the coordinated regional climate downscaling experiment (CORDEX)-Africa data outputs of Hadley Global Environment Model 2-Earth System (HadGEM2-ES) under representative concentration pathway (RCP) scenarios (RCP4.5 and RCP8.5). Future scenarios of climate change were analyzed in two-time frames: 2020–2049 (2030s) and 2050–2079 (2060s). Both time frames were analyzed using both RCP scenarios from the baseline period (1971–2000). A Soil and Water Assessment Tool (SWAT) model was constructed to simulate the hydrological and the sedimentological responses to climate change. The model performance was calibrated and validated using the coefficient of determination (R2), Nash–Sutcliffe efficiency (NSE), and percent bias (PBIAS). The results of the calibration and the validation of the sediment yield R2, NSE, and PBIAS were 0.83, 0.79, and −23.4 and 0.85, 0.76, and −25.0, respectively. The results of downscaled precipitation, temperature, and estimated evapotranspiration increased in both emission scenarios. These climate variable increments were expected to result in intensifications in the mean annual sediment yield of 4.42% and 8.08% for RCP4.5 and 7.19% and 10.79% for RCP8.5 by the 2030s and the 2060s, respectively. View Full-Text
Keywords: Logiya watershed; climate change; CORDEX-Africa; SWAT; RCP; sediment yield Logiya watershed; climate change; CORDEX-Africa; SWAT; RCP; sediment yield
Show Figures

Figure 1

MDPI and ACS Style

Jilo, N.B.; Gebremariam, B.; Harka, A.E.; Woldemariam, G.W.; Behulu, F. Evaluation of the Impacts of Climate Change on Sediment Yield from the Logiya Watershed, Lower Awash Basin, Ethiopia. Hydrology 2019, 6, 81.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop