Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta

Abstract Enhancing crop production, particularly by growing a crop in the typically-fallow dry season is a key strategy for alleviating poverty in the Ganges delta region. We used a polder water and salt balance model to examine the impact of several crop management, salt management and climate chan...

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Autores principales:	Mohammed Mainuddin, Fazlul Karim, Donald S. Gaydon, John M. Kirby
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6806b16c66f342b39a95f69f44454061
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spelling	oai:doaj.org-article:6806b16c66f342b39a95f69f444540612021-12-02T18:17:54ZImpact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta10.1038/s41598-021-86206-12045-2322https://doaj.org/article/6806b16c66f342b39a95f69f444540612021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86206-1https://doaj.org/toc/2045-2322Abstract Enhancing crop production, particularly by growing a crop in the typically-fallow dry season is a key strategy for alleviating poverty in the Ganges delta region. We used a polder water and salt balance model to examine the impact of several crop management, salt management and climate change scenarios on salinity and crop evapotranspiration at Dacope and Amtali in Bangladesh and Gosaba in India. A key (and unsurprising) finding is that salt management is very important, particularly at the two drier sites, Dacope and Gosaba. Good salt management lowers salinity in the shallow groundwater, soil and water storage ponds, and leads to more irrigation. Climate change is projected to alter rainfall, and this in turn leads to modelled increases or decreases in runoff from the polders, and thence affect salt concentrations in the soil and ponds and canals. Thus, the main impacts of climate change are through the indirect impacts on salt concentrations, rather than the direct impacts of the amount of water supplied as rainfall. Management practices to remove salt from polders are therefore likely to be effective in combatting the impacts of projected climate change particularly at Dacope and Gosaba.Mohammed MainuddinFazlul KarimDonald S. GaydonJohn M. KirbyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mohammed Mainuddin Fazlul Karim Donald S. Gaydon John M. Kirby Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta
description	Abstract Enhancing crop production, particularly by growing a crop in the typically-fallow dry season is a key strategy for alleviating poverty in the Ganges delta region. We used a polder water and salt balance model to examine the impact of several crop management, salt management and climate change scenarios on salinity and crop evapotranspiration at Dacope and Amtali in Bangladesh and Gosaba in India. A key (and unsurprising) finding is that salt management is very important, particularly at the two drier sites, Dacope and Gosaba. Good salt management lowers salinity in the shallow groundwater, soil and water storage ponds, and leads to more irrigation. Climate change is projected to alter rainfall, and this in turn leads to modelled increases or decreases in runoff from the polders, and thence affect salt concentrations in the soil and ponds and canals. Thus, the main impacts of climate change are through the indirect impacts on salt concentrations, rather than the direct impacts of the amount of water supplied as rainfall. Management practices to remove salt from polders are therefore likely to be effective in combatting the impacts of projected climate change particularly at Dacope and Gosaba.
format	article
author	Mohammed Mainuddin Fazlul Karim Donald S. Gaydon John M. Kirby
author_facet	Mohammed Mainuddin Fazlul Karim Donald S. Gaydon John M. Kirby
author_sort	Mohammed Mainuddin
title	Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta
title_short	Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta
title_full	Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta
title_fullStr	Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta
title_full_unstemmed	Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta
title_sort	impact of climate change and management strategies on water and salt balance of the polders and islands in the ganges delta
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6806b16c66f342b39a95f69f44454061
work_keys_str_mv	AT mohammedmainuddin impactofclimatechangeandmanagementstrategiesonwaterandsaltbalanceofthepoldersandislandsinthegangesdelta AT fazlulkarim impactofclimatechangeandmanagementstrategiesonwaterandsaltbalanceofthepoldersandislandsinthegangesdelta AT donaldsgaydon impactofclimatechangeandmanagementstrategiesonwaterandsaltbalanceofthepoldersandislandsinthegangesdelta AT johnmkirby impactofclimatechangeandmanagementstrategiesonwaterandsaltbalanceofthepoldersandislandsinthegangesdelta
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Impact of climate change and management strategies on water and salt balance of the polders and islands in the Ganges delta

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