Terrestrial water load and groundwater fluctuation in the Bengal Basin

Abstract Groundwater-level fluctuations represent hydraulic responses to changes in groundwater storage due to aquifer recharge and drainage as well as to changes in stress that include water mass loading and unloading above the aquifer surface. The latter ‘poroelastic’ response of confined aquifers...

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Autores principales:	W. G. Burgess, M. Shamsudduha, R. G. Taylor, A. Zahid, K. M. Ahmed, A. Mukherjee, D. J. Lapworth, V. F. Bense
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0f1ec2f141274fee853d1134215acf5d
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spelling	oai:doaj.org-article:0f1ec2f141274fee853d1134215acf5d2021-12-02T16:08:10ZTerrestrial water load and groundwater fluctuation in the Bengal Basin10.1038/s41598-017-04159-w2045-2322https://doaj.org/article/0f1ec2f141274fee853d1134215acf5d2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04159-whttps://doaj.org/toc/2045-2322Abstract Groundwater-level fluctuations represent hydraulic responses to changes in groundwater storage due to aquifer recharge and drainage as well as to changes in stress that include water mass loading and unloading above the aquifer surface. The latter ‘poroelastic’ response of confined aquifers is a well-established phenomenon which has been demonstrated in diverse hydrogeological environments but is frequently ignored in assessments of groundwater resources. Here we present high-frequency groundwater measurements over a twelve-month period from the tropical, fluvio-deltaic Bengal Aquifer System (BAS), the largest aquifer in south Asia. The groundwater level fluctuations are dominated by the aquifer poroelastic response to changes in terrestrial water loading by processes acting over periods ranging from hours to months; the effects of groundwater flow are subordinate. Our measurements represent the first direct, quantitative identification of loading effects on groundwater levels in the BAS. Our analysis highlights the potential limitations of hydrogeological analyses which ignore loading effects in this environment. We also demonstrate the potential for employing poroelastic responses in the BAS and across other tropical fluvio-deltaic regions as a direct, in-situ measure of changes in terrestrial water storage to complement analyses from the Gravity and Climate Experiment (GRACE) mission but at much higher resolution.W. G. BurgessM. ShamsudduhaR. G. TaylorA. ZahidK. M. AhmedA. MukherjeeD. J. LapworthV. F. BenseNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q W. G. Burgess M. Shamsudduha R. G. Taylor A. Zahid K. M. Ahmed A. Mukherjee D. J. Lapworth V. F. Bense Terrestrial water load and groundwater fluctuation in the Bengal Basin
description	Abstract Groundwater-level fluctuations represent hydraulic responses to changes in groundwater storage due to aquifer recharge and drainage as well as to changes in stress that include water mass loading and unloading above the aquifer surface. The latter ‘poroelastic’ response of confined aquifers is a well-established phenomenon which has been demonstrated in diverse hydrogeological environments but is frequently ignored in assessments of groundwater resources. Here we present high-frequency groundwater measurements over a twelve-month period from the tropical, fluvio-deltaic Bengal Aquifer System (BAS), the largest aquifer in south Asia. The groundwater level fluctuations are dominated by the aquifer poroelastic response to changes in terrestrial water loading by processes acting over periods ranging from hours to months; the effects of groundwater flow are subordinate. Our measurements represent the first direct, quantitative identification of loading effects on groundwater levels in the BAS. Our analysis highlights the potential limitations of hydrogeological analyses which ignore loading effects in this environment. We also demonstrate the potential for employing poroelastic responses in the BAS and across other tropical fluvio-deltaic regions as a direct, in-situ measure of changes in terrestrial water storage to complement analyses from the Gravity and Climate Experiment (GRACE) mission but at much higher resolution.
format	article
author	W. G. Burgess M. Shamsudduha R. G. Taylor A. Zahid K. M. Ahmed A. Mukherjee D. J. Lapworth V. F. Bense
author_facet	W. G. Burgess M. Shamsudduha R. G. Taylor A. Zahid K. M. Ahmed A. Mukherjee D. J. Lapworth V. F. Bense
author_sort	W. G. Burgess
title	Terrestrial water load and groundwater fluctuation in the Bengal Basin
title_short	Terrestrial water load and groundwater fluctuation in the Bengal Basin
title_full	Terrestrial water load and groundwater fluctuation in the Bengal Basin
title_fullStr	Terrestrial water load and groundwater fluctuation in the Bengal Basin
title_full_unstemmed	Terrestrial water load and groundwater fluctuation in the Bengal Basin
title_sort	terrestrial water load and groundwater fluctuation in the bengal basin
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0f1ec2f141274fee853d1134215acf5d
work_keys_str_mv	AT wgburgess terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin AT mshamsudduha terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin AT rgtaylor terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin AT azahid terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin AT kmahmed terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin AT amukherjee terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin AT djlapworth terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin AT vfbense terrestrialwaterloadandgroundwaterfluctuationinthebengalbasin
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Terrestrial water load and groundwater fluctuation in the Bengal Basin

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