Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India

Parametric models of actual evapotranspiration (AET) based on precipitation (P) and potential evapotranspiration (PET) are region-specific and purely climate-induced and limited to represent the hydrological water balances. Basin-averaged model parameters considering P, AET, and runoff (R) using a m...

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Autores principales:	S. Rehana, G. Sireesha Naidu, N. T. Monish, U. Sowjanya
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	budyko hypothesis cordex pcraster regional circulation models thornthwaite model Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/16a3c156521847f687fe29c91fadb7b0
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id	oai:doaj.org-article:16a3c156521847f687fe29c91fadb7b0
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spelling	oai:doaj.org-article:16a3c156521847f687fe29c91fadb7b02021-11-05T18:31:11ZModeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India2040-22442408-935410.2166/wcc.2020.173https://doaj.org/article/16a3c156521847f687fe29c91fadb7b02021-03-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/2/502https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Parametric models of actual evapotranspiration (AET) based on precipitation (P) and potential evapotranspiration (PET) are region-specific and purely climate-induced and limited to represent the hydrological water balances. Basin-averaged model parameters considering P, AET, and runoff (R) using a machine learning algorithm, ensemble regression model, is proposed. Hydrologically calibrated model parameters allowed the study of AET under alterations of water use for current and for future scenarios under climate change. The effect of climate, water, and land use changes on AET was studied for the post-change period of 2004–2014 compared to pre-change period of 1965–2003 over Krishna river basin (KRB), India. The AET has increased under climate and water use changes while there is both increase and decreases of AET under land use changes for post-change period compared to pre-change period over the basin. Severe water shortages were estimated under pronounced increase of temperature (1.29 °C) compared to precipitation increase (2.19%) based on Coordinated Regional Downscaling Experiment (CORDEX) projections for the period 2021–2060. Hydrologically induced AET changes were more pronounced than climate for current climate; whereas climate-induced AET changes were found to be more prominent for projected climate signals over the basin.S. RehanaG. Sireesha NaiduN. T. MonishU. SowjanyaIWA Publishingarticlebudyko hypothesiscordexpcrasterregional circulation modelsthornthwaite modelEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 2, Pp 502-520 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	budyko hypothesis cordex pcraster regional circulation models thornthwaite model Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	budyko hypothesis cordex pcraster regional circulation models thornthwaite model Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 S. Rehana G. Sireesha Naidu N. T. Monish U. Sowjanya Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India
description	Parametric models of actual evapotranspiration (AET) based on precipitation (P) and potential evapotranspiration (PET) are region-specific and purely climate-induced and limited to represent the hydrological water balances. Basin-averaged model parameters considering P, AET, and runoff (R) using a machine learning algorithm, ensemble regression model, is proposed. Hydrologically calibrated model parameters allowed the study of AET under alterations of water use for current and for future scenarios under climate change. The effect of climate, water, and land use changes on AET was studied for the post-change period of 2004–2014 compared to pre-change period of 1965–2003 over Krishna river basin (KRB), India. The AET has increased under climate and water use changes while there is both increase and decreases of AET under land use changes for post-change period compared to pre-change period over the basin. Severe water shortages were estimated under pronounced increase of temperature (1.29 °C) compared to precipitation increase (2.19%) based on Coordinated Regional Downscaling Experiment (CORDEX) projections for the period 2021–2060. Hydrologically induced AET changes were more pronounced than climate for current climate; whereas climate-induced AET changes were found to be more prominent for projected climate signals over the basin.
format	article
author	S. Rehana G. Sireesha Naidu N. T. Monish U. Sowjanya
author_facet	S. Rehana G. Sireesha Naidu N. T. Monish U. Sowjanya
author_sort	S. Rehana
title	Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India
title_short	Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India
title_full	Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India
title_fullStr	Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India
title_full_unstemmed	Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India
title_sort	modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of india
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/16a3c156521847f687fe29c91fadb7b0
work_keys_str_mv	AT srehana modelinghydroclimaticchangesofevapotranspirationoverasemiaridriverbasinofindia AT gsireeshanaidu modelinghydroclimaticchangesofevapotranspirationoverasemiaridriverbasinofindia AT ntmonish modelinghydroclimaticchangesofevapotranspirationoverasemiaridriverbasinofindia AT usowjanya modelinghydroclimaticchangesofevapotranspirationoverasemiaridriverbasinofindia
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Modeling hydro-climatic changes of evapotranspiration over a semi-arid river basin of India

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