Evaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia

The aim of this study is to model the responses of Hangar Watershed hydrology to future climate changes under two representative concentration pathway (RCP) scenarios. Future changes in precipitation and temperature were produced using the output of dynamically downscaled data of a regional climate...

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Autores principales: Abdata Wakjira Galata, Kiyya Tesfa Tullu, Abebe Chala Guder
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Lenguaje:EN
Publicado: IWA Publishing 2021
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spelling oai:doaj.org-article:2d2417db69514286a0035729fa1962ed2021-11-05T19:07:17ZEvaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia2040-22442408-935410.2166/wcc.2021.229https://doaj.org/article/2d2417db69514286a0035729fa1962ed2021-09-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/6/2271https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354The aim of this study is to model the responses of Hangar Watershed hydrology to future climate changes under two representative concentration pathway (RCP) scenarios. Future changes in precipitation and temperature were produced using the output of dynamically downscaled data of a regional climate model (RCM) 0.44° resolution under RCP 4.5 and 8.5 scenarios for 2025–2055 and 2056–2086. The future projection of the RCM model of precipitation and temperatures showed an increasing trend relative to the base period (1987–2017). At 2025–2055 average annual precipitation increments of +15.7 and +19.8% were expected for RCP 4.5 and RCP 8.5, respectively. For 2056–2086 of RCP 4.5 and 8.5, a similar trend was also shown as average annual precipitation may increase by +20.1 and +23.4%, respectively. The changes of climate parameters were used as input into the SWAT hydrological model to simulate the future runoff at Hangar Watershed. The increment in precipitation projection resulted in a positive magnitude impact on average runoff flow. The average annual change in runoff at 2025–2055 of both RCP 4.5 and 8.5 may increase by +24.5 and +23.6%, respectively. In 2056–2086, a change in average annual runoff of +73.2 and +73.2% for RCP 4.5 and 8.5 may be expected, respectively. HIGHLIGHTS Climate change scenarios were reviewed and bias correction was carried out for simulated Regional Climate Model data.; Future precipitation and temperature were projected.; Impact of future climate changes on runoff was evaluated.;Abdata Wakjira GalataKiyya Tesfa TulluAbebe Chala GuderIWA Publishingarticleclimate change projectioncordex datahydrological processprecipitationtemperatureEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 6, Pp 2271-2287 (2021)
institution DOAJ
collection DOAJ
language EN
topic climate change projection
cordex data
hydrological process
precipitation
temperature
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
spellingShingle climate change projection
cordex data
hydrological process
precipitation
temperature
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
Abdata Wakjira Galata
Kiyya Tesfa Tullu
Abebe Chala Guder
Evaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia
description The aim of this study is to model the responses of Hangar Watershed hydrology to future climate changes under two representative concentration pathway (RCP) scenarios. Future changes in precipitation and temperature were produced using the output of dynamically downscaled data of a regional climate model (RCM) 0.44° resolution under RCP 4.5 and 8.5 scenarios for 2025–2055 and 2056–2086. The future projection of the RCM model of precipitation and temperatures showed an increasing trend relative to the base period (1987–2017). At 2025–2055 average annual precipitation increments of +15.7 and +19.8% were expected for RCP 4.5 and RCP 8.5, respectively. For 2056–2086 of RCP 4.5 and 8.5, a similar trend was also shown as average annual precipitation may increase by +20.1 and +23.4%, respectively. The changes of climate parameters were used as input into the SWAT hydrological model to simulate the future runoff at Hangar Watershed. The increment in precipitation projection resulted in a positive magnitude impact on average runoff flow. The average annual change in runoff at 2025–2055 of both RCP 4.5 and 8.5 may increase by +24.5 and +23.6%, respectively. In 2056–2086, a change in average annual runoff of +73.2 and +73.2% for RCP 4.5 and 8.5 may be expected, respectively. HIGHLIGHTS Climate change scenarios were reviewed and bias correction was carried out for simulated Regional Climate Model data.; Future precipitation and temperature were projected.; Impact of future climate changes on runoff was evaluated.;
format article
author Abdata Wakjira Galata
Kiyya Tesfa Tullu
Abebe Chala Guder
author_facet Abdata Wakjira Galata
Kiyya Tesfa Tullu
Abebe Chala Guder
author_sort Abdata Wakjira Galata
title Evaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia
title_short Evaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia
title_full Evaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia
title_fullStr Evaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia
title_full_unstemmed Evaluating watershed hydrological responses to climate changes at Hangar Watershed, Ethiopia
title_sort evaluating watershed hydrological responses to climate changes at hangar watershed, ethiopia
publisher IWA Publishing
publishDate 2021
url https://doaj.org/article/2d2417db69514286a0035729fa1962ed
work_keys_str_mv AT abdatawakjiragalata evaluatingwatershedhydrologicalresponsestoclimatechangesathangarwatershedethiopia
AT kiyyatesfatullu evaluatingwatershedhydrologicalresponsestoclimatechangesathangarwatershedethiopia
AT abebechalaguder evaluatingwatershedhydrologicalresponsestoclimatechangesathangarwatershedethiopia
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