Hydrological characterization and social dynamics of polders in the Bengal Delta [Abstract only]

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cg.contributor.affiliationInternational Water Management Instituteen
cg.contributor.donorCGIAR Trust Funden
cg.contributor.initiativeAsian Mega-Deltas
cg.coverage.countryBangladesh
cg.coverage.iso3166-alpha2BD
cg.coverage.regionSouthern Asia
cg.coverage.subregionBengal Delta
cg.coverage.subregionGanges-Brahmaputra Delta
cg.creator.identifierMahesh Jampani: 0000-0002-8925-719Xen
cg.creator.identifierkarthikeyan matheswaran: 0000-0001-7377-0629en
cg.identifier.iitathemeNUTRITION & HUMAN HEALTHen
cg.identifier.iwmilibraryH052357en
cg.identifier.urlhttps://agu.confex.com/agu/fm23/meetingapp.cgi/Paper/1450505en
cg.river.basinGANGESen
dc.contributor.authorJampani, Maheshen
dc.contributor.authorMatheswaran, Karthikeyanen
dc.date.accessioned2023-12-15T10:41:52Zen
dc.date.available2023-12-15T10:41:52Zen
dc.identifier.urihttps://hdl.handle.net/10568/135433
dc.titleHydrological characterization and social dynamics of polders in the Bengal Delta [Abstract only]en
dcterms.abstractPolders in the floodplains of the Ganges-Brahmaputra delta in Bangladesh play a critical role in supporting intensive agricultural production and the livelihoods of around eight million people. Polderization is promoted to reduce environmental vulnerabilities against flood inundation, coastal erosion, and salinity intrusion. These land areas are low-lying islands consisting mainly of alluvial sediment deposits, and almost half (~1.2 million ha) of the coastal zone in the region is polderized. Agriculture is the primary reason for the polderization of the region, where paddy rice is the major irrigated crop. Around 139 polders in Bangladesh spread across the Gangetic-Brahmaputra delta region, and they altered the delicate balance between human activity and the floodplains' natural hydrological process, resulting in numerous evolving problems. These include the geomorphological evolution of the river channels and flood plains, water logging and drainage congestion within the polder system, sea-level rise, tidal surges, and salinity intrusion. Coastal and inland salinity is a significant problem in these polders, often influencing crop yields and further agricultural productivity and freshwater availability. We explicitly look at two polders to evaluate the distinct socio-hydrological characteristics of these systems. We used several secondary data sources and literature (grey and scientific) to evaluate the hydrological characteristics, groundwater heterogeneity and social dynamics to understand and evaluate the underlying mechanisms and intrinsic links between systems that influence water balance, saline water intrusion, and crop production. The initial results highlight the complex dynamics of the polder system, often influenced by water availability, irrigated water use, seasonality, and, above all, stakeholders' perceptions. Overall, this work provides an improved understanding of the biophysical dynamics and social linkages and sets the basis for implementing a larger detailed socio-hydrological framework.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationJampani, Mahesh; Matheswaran, Karthikeyan. 2023. Hydrological characterization and social dynamics of polders in the Bengal Delta [Abstract only]. Paper presented at the American Geophysical Union Annual Meeting 2023 (AGU23), San Francisco, CA, USA and Online, 11-15 December 2023. 2p. en
dcterms.issued2023-12-16en
dcterms.languageen
dcterms.licenseOther
dcterms.subjectfloodplainsen
dcterms.subjectreclaimed landen
dcterms.subjectlivelihoodsen
dcterms.subjectagricultural productionen
dcterms.subjectsedimentationen
dcterms.subjectgeomorphologyen
dcterms.subjectwaterloggingen
dcterms.subjectwater availabilityen
dcterms.typeConference Paper

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