This study illustrates the influences of sea-level on the depositional process during the last 1000 years of the southwestern delta, Bangladesh. Sediments of eight litho-sections from landward in upper delta plain to seaward in lower delta plain along the Rupsa-Pasur river were studied. Sedimentary facies, total organic carbon, total nitrogen, δ13C value, diatom assemblages, and radiocarbon dating of deposits were carried out to determine the paleoenvironments that were influenced by the relative sea-level (RSL) change over time. During the 850–1300 AD, RSL was reached up to +80 cm higher than the present level where tidal-influenced bioturbated light yellow to gray mud deposited in the upper delta plain area. RSL was dropped up to −110 cm during 1300–1850 AD, organic-rich bluish-gray mud, mangrove peat, and terrestrial influenced yellowish-gray mud were deposited successively in the lower delta plain area, and the terrace was formed at landward due to the lowering of the base level. RSL started to rise after the period 1850 AD where tidal-influenced sediments gradually increased and deposited in the upper part at seaward and terrestrial flood sediment deposited over the erosional surface at the landward part. The estimated average sedimentation rate (1.96–2.89 mm/year) is not enough to offset the effect of subsidence and present sea-level rise over the study area. The rising trend of the sea creates inundation in the lower delta plain area, also hinders upstream water flow. For that, terrestrial flood sediments settle over the erosional surface in landward, and tidal-influenced sediment gradually onlap upon it from seaward.
Abu-ZiedRHBantanRA (2015) Palaeoenvironment, palaeoclimate, and sea-level changes in the Shuaiba Lagoon during the late-Holocene (last 3.6 ka), eastern Red Sea coast, Saudi Arabia. The Holocene25(8): 1301–1312.
2.
AkterJSarkerMHPopescuJ, et al. (2016) Evolution of the Bengal Delta and its prevailing processes. Journal of Coastal Research32(5): 1212–1226.
3.
AlamM (1996) Subsidence of the Ganges–Brahmaputra Delta of Bangladesh and associated drainage, sedimentation and salinity. In: MillimanJDHaqBU (eds) Sea-Level Rise and Coastal Subsidence. Dordrecht, The Netherlands: Kluwer Academic Publishers, pp.169–192.
4.
AlamMAlamMMCurrayJR, et al. (2003) An overview of the sedimentary geology of the Bengal Basin in relation to the regional tectonic framework and basin-fill history. Sedimentary Geology155(3–4): 179–208.
5.
AlamMKHassanAKMSKhanMR, et al. (1990) Geological map of Bangladesh. Geological Survey of Bangladesh, Dhaka, Scale 1: 1 000 000.
6.
AllisonMKeppleE (2001) Modern sediment supply to the lower delta plain of the Ganges-Brahmaputra River in Bangladesh. Geo-Marine Letters21: 66–74.
7.
AllisonMKhanSRGoodbredSLJr, et al. (2003) Stratigraphic evolution of the late-Holocene Ganges-Brahmaputra lower delta plain. Sedimentary Geology155: 317–342.
8.
AllisonMA (1998) Historical changes in the Ganges-Brahmaputra delta front. Journal of Coastal Research14: 1269–1275.
9.
AlongiDM (2015) The impact of climate change on mangrove forests. Current Climate Change Report1: 30–39.
10.
AuerbachLWGoodbredSLJrMondalDR, et al. (2015) Flood risk of natural and embanked landscapes on the Ganges–Brahmaputra tidal delta plain. Nature Climate Change5: 153–157.
11.
BlairNECarterWDJr (1991) The carbon isotope biogeochemistry of acetate from a methanogenic marine sediment. Geochemical et Cosmochimica Acta56: 1247–1258.
12.
BouillonSDahdouh-GuebasFRaoAVVS, et al. (2003) Sources of organic carbon in mangrove sediments: Variability and possible ecological implications. Hydrobiologia495(1): 33–39.
13.
BrammerH (2014) Bangladesh’s dynamic coastal regions and sea-level rise. Climate Risk Management1: 51–62.
14.
BreithauptJLSmoakJMSmithTJ, et al. (2014) Temporal variability of carbon and nutrient burial, sediment accretion, and mass accumulation over the past century in a carbonate platform mangrove forest of the Florida Everglades. Journal of Geophysical Research119: 2032–2048.
15.
BrownSNichollsRJ (2015) Subsidence and human influences in mega deltas: The case of the Ganges–Brahmaputra–Meghna. Science of the Total Environment527–528: 362–374.
16.
ChamberlainELWallingaJReimannT, et al. (2017) Luminescence dating of delta sediments: Novel approaches explored for the Ganges-Brahmaputra-Meghna Delta. Quaternary Geochronology41: 97–111.
17.
Climate Change Cell (CCC) (2016) Assessment of sea level change on Bangladesh Coast through trend analysis. Department of Environment Ministry of Environment and Forests, Bangladesh.
18.
CohenMCLPedroMWRubenLJ, et al. (2005) A model of Holocene mangrove development and relative sea-level changes on the Braganca Peninsula (northern Brazil). Wetland Ecology and Management13: 433–443.
19.
CurrayJR (1994) Sediment volume and mass beneath the Bay of Bengal. Earth and Planetary Science Letters125: 371–383.
20.
DaiduF (2013) Classifications, sedimentary features, and facies associations of tidal flats. Journal of Palaeogeography2(1): 66–80.
21.
DarbySEHackneyCRLeylandJ, et al. (2016) Fluvial sediment supply to a mega-delta reduced by shifting tropical-cyclone activity. Nature539(7628): 276.
22.
DeinesP (1980) The isotopic composition of reduced organic carbon. In: FritzPFontesJC (eds) Handbook of Environmental Isotope Geochemistry, Vol. 1. The Terrestrial Environment. A. Amsterdam: Elsevier, pp.329–406.
23.
DuffD (1993) Holmes’ Principles of Physical Geology, 14th edn.Cheltenham: Stanley Thornes (Publishers) Ltd.
24.
DunnFENichollsRJDarbySE, et al. (2018) Projections of historical and 21st century fluvial sediment delivery to the Ganges-Brahmaputra-Meghna, Mahanadi, and Volta Deltas. Science of the Total Environment642: 105–116.
25.
GaoXYangYWangC (2012) Geochemistry of organic carbon and nitrogen in surface sediments of coastal Bohai Bay inferred from their ratios and stable isotopic signatures. Marine Pollution Bulletin64: 1148–1155.
26.
GhoshASchmidtSFickertT, et al. (2015) The Indian Sundarban mangrove forests: History, utilization, conservation strategies and local perception. Diversity7(2): 149–169.
27.
GhoshMKKumarLRoyC (2016) Mapping long-term changes in mangrove species composition and distribution in the Sundarbans. Forests7(12): 305.
28.
GonneeaMEPaytanAHerrera-SilveiraJE (2004) Tracing organic matter sources and carbon burial in mangrove sediments over the past 160 years. Estuarine, Coastal, and Shelf Science61: 211–227.
29.
GoodbredSLJrKuehlSA (1999) Holocene and modern sediment budgets for the Ganges-Brahmaputra river system: Evidence for highstand dispersal to flood-plain, shelf, and deep-sea depocenters. Geology27(6): 559–563.
30.
GoodbredSLJrKuehlSA (2000a) Enormous Ganges-Brahmaputra sediment discharge during strengthened early Holocene monsoon. Geology28: 1083–1086.
31.
GoodbredSLJrKuehlSA (2000b) The significance of large sediment supply, active tectonism, and eustasy on sequence development: Late Quaternary stratigraphy and evolution of the Ganges-Brahmaputra delta. Sedimentary Geology133: 227–248.
32.
GoodbredSLJrKuehlSASteclerMS, et al. (2003) Controls on facies distribution and stratigraphic preservation in the Ganges-Brahmaputra delta sequence. Sedimentary Geology155: 301–316.
33.
GoodbredSLJrPaoloPMUllahMS, et al. (2014) Piecing together the Ganges-Brahmaputra-Meghna River delta: Use of sediment provenance to reconstruct the history and interaction of multiple fluvial systems during Holocene delta evolution. Geological Society of America (GSA) Bulletin126(11–12): 1495–1510.
34.
GrahamMCEavesMAFarmerJG, et al. (2001) A study of carbon and nitrogen stable isotope and elemental ratios as potential indicators of source and fate of organic matter in sediments of the Forth Estuary, Scotland. Estuarine, Coastal, and Shelf Science52: 375–380.
35.
GrallCStecklerMSPickeringJL, et al. (2018) A base-level stratigraphic approach to determining Holocene subsidence of the Ganges–Meghna–Brahmaputra Delta plain. Earth and Planetary Science Letters499: 23–36.
36.
GriffithsJAZhuFChanFKS, et al. (2019) Modeling the impact of sea-level rise on urban flood probability in SE China. Geoscience Frontiers10: 363–372.
37.
GrinstedAMooreJCJevrejevaS (2010) Reconstructing sea level from paleo and projected temperatures 200 to 2100 AD. Climate Dynamics34: 461–472.
38.
HanebuthTJJKudrassHRLinstädterJ, et al. (2013) Rapid coastal subsidence in the Central Ganges–Brahmaputra Delta (Bangladesh) since the 17th century deduced from submerged salt-producing kilns. Geology41: 987–990.
39.
HayCCMorrowEKoppRE, et al. (2015) Probabilistic reanalysis of twentieth-century sea-level rise. Nature517: 481–484.
40.
HeBDaiMHuangW, et al. (2010) Sources and accumulation of organic carbon in the Pearl River Estuary surface sediment as indicated by elemental, stable carbon isotopic, and carbohydrate compositions. Biogeosciences7: 3343–3362.
HoqueMAlamM (1997) Subsidence of lower deltaic area of Bangladesh: Probabilistic reanalysis of twentieth-century sea-level rise. Marine Geology20(1): 105–120.
43.
HowaHLStanleyDJ (1991) Plant-rich Holocene sequences in the northern Nile delta plain, Egypt: Petrology, distribution, and depositional environments. Journal of Coastal Research7(4): 1077–1096.
Intergovernmental Panel on Climate Change (IPCC) (2007) Climate change 2007: Synthesis report. Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Geneva, Switzerland.
46.
IslamMSTooleyMJ (1999) Coastal and sea-level changes during the Holocene in Bangladesh. Quaternary International55: 61–75.
47.
JasperJPGagosianRB (1990) The source of the deposition of organic matter in the Late Quaternary Pigmy Basin, Gulf of Mexico. Geochimica et Cosmo-Chemica Acta54: 1117–1132.
KarpytchevMBalluVKrienY, et al. (2018) Contribution of a strengthened early Holocene monsoon and sediment loading to present-day subsidence to the Ganges-Brahmaputra delta. American Geophysical Union45: 1433–1442.
50.
KrammerK (2000) Diatoms of Europe: Diatoms of European inland water and comparable habitats. In: Lange-BertalotH (ed.) The Genus Pinnularia, vol. 1. Ruggell: Gantner.
51.
KrammerK (2002) Diatoms of Europe: Diatoms of European inland water and comparable habitats. In: Lange-BertalotH (ed.) The Genus Cymbella, vol. 3. Ruggell: Gantner.
52.
KrammerK (2003) Diatoms of Europe: Diatoms of European inland water and comparable habitats. In: Lange BertalotH (ed.) Cymbopleura, Delicata, Navicymbula, Gomphocymbellopsis, Afrocymell, vol. 4. Ruggell: Gantner.
53.
KrienYKarpytchevMBalluV, et al. (2019) Present-day subsidence in the Ganges-Brahmaputra-Meghna Delta: Eastern amplification of the Holocene sediment loading contribution. Geophysical Research Letters, American Geophysical Union46(19): 10764–10772.
54.
KristensenEBouillonSDittmarT, et al. (2008) Organic matter dynamics in mangrove ecosystems. Aquatic Botany89: 201–219.
55.
KuehlSAAllisonMAGoodbredSLJr, et al. (2005) The Ganges-Brahmaputra delta. In: GosianLBhattacharyaJ (eds) River Deltas: Concepts, Models, and Examples, vol. 83. Tulsa, OK: SEPM Special Publication, pp.413–434.
56.
LambALWilsonGPLengMJ (2006) A review of coastal palaeoclimate and relative sea-level reconstructions using δ13C and C/N ratios in organic material. Earth Science Review75: 29–57.
57.
Lange-BertalotH (2000) Iconographia Diatomologica Annotated Diatom Micrographs—Diatom Flora of Marine Coasts I, vol. 7.Königstein, Germany: Koeltz Scientific Books (Copyright: A.R.G. Gantner Verlag K.G. by Andrzej Witkowiski, Horst Lange-Bertalot, and Ditmar Metzeltin).
58.
Lange-BertalotH (2001) Diatoms of Europe: Diatoms of European inland water and comparable habitats. In: Lange-BertalotH (ed.) Navicula sensu stricto, 10 Genera Separated from Navicula sensu stricto, Frustulia, vol. 2. Ruggell: Gantner.
59.
LevkovZ (2009) Diatoms of Europe: Diatoms of European inland water and comparable habitats. In: Lange-BertalotH (ed.) Amphora sensulato, vol. 5. Ruggell: Gantner.
60.
MannMEZhangZRutherfordS, et al. (2009) Global signatures and dynamical origins of the Little Ice Age and Medieval Climate Anomaly. Science326(5957): 1256–1260.
61.
MarchandCDisnarJRLallier-VergesE, et al. (2005) Early diagenesis of carbohydrates and lignin in mangrove sediments subject to variable redox conditions (French Guiana). Geochimica et Cosmochimica Acta69(1): 131–142.
62.
MeyersPA (1994) Preservation of elemental and isotopic source identification of sedimentary organic matter. Chemical Geology144: 289–302.
63.
MeyersPA (1997) Organic geochemical proxies of paleoceanographic, paleolimnologic, and paleoclimatic processes. Organic Geochemistry27: 213–250.
64.
MillimanJDFarnsworthKL (2013) River Discharge to the Coastal Ocean: A Global Synthesis. Cambridge, MA: Cambridge University Press.
65.
MouyenMLonguevergneLSteerP, et al. (2018) Assessing modern river sediment discharge to the ocean using satellite gravimetry. Nature Communications9: 3384.
66.
MukherjeeAFryarAEThomasWA (2009) Geologic, geomorphic and hydrologic framework and evolution of the Bengal basin, India and Bangladesh. Journal of Asian Earth Sciences34: 227–244.
67.
MukherjeeBB (1972) Pollen analysis of a few Quarternary deposits of lower Bengal Basin. In: GhoshKChandaSGhoshTK, et al. (eds) Proceedings of the Seminar on Palaeopalynology and Indian Stratigraphy. Calcutta, India: Calcutta University, pp.357–374.
68.
NeidhardtHBiswasAFreikowskiD, et al. (2013) Reconstructing the sedimentation history of the Bengal Delta Plain by means of geochemical and stable isotopic data. Applied Geochemistry36: 70–82.
69.
NichollsRJHuttonCWLazarAN, et al. (2016) Integrated assessment of social and environmental sustainability dynamics in the Ganges-Brahmaputra-Meghna Delta, Bangladesh. Estuarine and Coastal Shelf Science183: 370–381.
70.
NichollsRJWilsonT (2001) Chapter 5: Integrated impacts on coastal areas and river flooding. In: HolmanIPLovelandPJ (eds) Regional Climate Change Impact and Response Studies in East Anglia and North West England (RegIS). Oxford: UK Climate Impacts Programme (UKCIP), pp.54–103.
71.
NunnPD (1998) Sea-level changes over the past 1,000 years in the Pacific. Journal of Coastal Research14(1): 23–30.
72.
OmuraAHoyanagiK (2004) Relationships between composition of organic matter, depositional environments, and sea-level changes in backarc basins, central Japan. Journal of Sedimentary Research74: 620–630.
73.
OmuraAHoyanagiKIshikawaS (2006) Effect of depositional processes on the origin and composition of organic matter: Examples from the Pleistocene sediments in the Choshi core, Boso Peninsula. Island Arc15: 355–365.
74.
OtaYUmitsuMMatsushimaY (1990) Recent Japanese research on relative sea level changes in the Holocene and related problems. The Quaternary Research29(1): 31–48.
75.
PatrickRMReimerCW (1966) The diatoms of the United States, exclusive of Alaska and Hawaii. vol. 1. Philadelphia, PA: Academy of Natural Sciences of Philadelphia.
76.
PatrickRMReimerCW (1975) The diatoms of the United States, exclusive of Alaska and Hawaii.vol. 2, Part 1. Philadelphia, PA: Academy of Natural Sciences of Philadelphia.
77.
PickeringJLGoodbredSLJrBeamJC, et al. (2018) Terrace development in the upper Bengal basin since the middle Pleistocene: History of Brahmaputra-Jamuna delta construction during multiple highlands. Basin Research30: 550–567.
78.
PickeringMDHorsburghKJBlundellJR, et al. (2017) The impact of future sea-level rise on the global tides. Continental Shelf Research142: 50–68.
79.
PrasadMBKDittmerTRamathanAL (2010) Organic matter and mangrove productivity. In: RamanathanALBhattacharyaPDittmarT, et al. (eds) Management and Sustainable Development of the Coastal Zone Environments. New Dordrecht: Springer, pp.175–193.
80.
PrasadMBKKumarARamathanAL, et al. (2017) Sources and dynamics of sedimentary organic matter in Sundarban mangrove estuary from Indo-Gangetic delta. Ecological Processes6: 8.
81.
PrasadMBKRamanathanAL (2009) Organic matter characterization in a tropical estuary-mangrove ecosystem of India: Preliminary assessment by using stable isotope and lignin phenol. Estuarine Coast and Shelf Science84(4): 617–624.
82.
RahmanAFDragoniDEl-MasriB (2011) Response of the Sundarbans coastline to sea level rise and decreased sediment flow: A remote sensing assessment. Remote Sensing of Environment115: 3121–3128.
83.
RahmanMDustegirMKarimR, et al. (2018) Recent sediment flux to the Ganges-Brahmaputra-Meghna delta system. Science of Total Environment643: 1054–1064.
84.
RamseyCB (2009) Bayesian analysis of radiocarbon dates. Radiocarbon51(1): 337–360.
85.
RanjanRKRouthJRamanathanAL, et al. (2011) Elemental and stable isotope records of organic matter input and its fate in the Pichavaram mangrove–estuarine sediments (Tamil Nadu, India). Marine Chemistry126: 163–172.
86.
RashidTSuzukiSSatoH, et al. (2013) Relative sea-level changes during the Holocene in Bangladesh. Journal of Asian Earth Sciences64: 136–150.
87.
RayRRixenTBaumA, et al. (2015) Distribution, sources, and biogeochemistry of organic matter in a mangrove dominated estuarine system (Indian Sundarbans) during the pre-monsoon. Estuarine, Coastal and Shelf Science167: 404–413.
88.
RayRShahrakiM (2016) Multiple sources driving the organic matter dynamics in two contrasting tropical mangroves. Science of the Total Environment571: 218–227.
89.
ReimerPJBardEBaylissA, et al. (2013) IntCall3 and Marine13 radiocarbon age calibration curves, 0–50,000 years cal BP. Radiocarbon55(4): 1869–1887.
90.
RossiVMPatersonNWHelland-HansenW, et al. (2019) Mud-rich delta-scale compound clinoforms in the Triassic shelf of northern Pangea (Havert Formation, south-western Barents Sea). Sedimentology66: 2234–2267.
91.
RoundFECrawfordRMMannDG (1990) The Diatoms: Biology and Morphology of the Genera. Cambridge, MA: Cambridge University Press.
92.
SaintilanNRogersKMazumderD, et al. (2013) Allochthonous and autochthonous contributions to carbon accumulation and carbon store in southeastern Australian coastal wetlands. Estuarine, Coastal, and Shelf Science128: 84–92.
93.
SarkarASenguptaSMcArthurJM, et al. (2009) Evolution of Ganges–Brahmaputra western delta plain: Clues from sedimentology and carbon isotopes. Quaternary Science Reviews28: 2564–2581.
94.
SpaldingM (2010) World Atlas of Mangroves. Abingdon: Routledge.
95.
StanleyDJHaitAK (2000) Holocene depositional patterns, neotectonics, and Sundarban mangroves in the western Ganges-Brahmaputra delta. Journal of Coastal Research16(1): 26–39.
96.
StecklerMSAkhterSHSeeberL (2008) Collision of the Ganges–Brahmaputra Delta with the Burma Arc: Implications for earthquake hazard. Earth and Planetary Science Letters273: 367–378.
97.
StecklerMSNoonerSLAkhterSH, et al. (2010) Modeling Earth deformation from monsoonal flooding in Bangladesh using hydrographic, GPS, and Gravity Recovery and Climate Experiment (GRACE) data. Journal of Geophysical Research115: B08407.
98.
SyvitskiJPMKettnerA (2011) Sediment flux and the Anthropocene. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences369(1938): 957–975.
99.
SyvitskiJPMKettnerAJOvereemI, et al. (2009) Sinking deltas due to human activities. Nature Geosciences2: 681–686.
100.
TakagiHThaoNDAnhLA (2016) Sea-level rise and land subsidence: Impacts on flood projections for the Mekong Delta’s largest city. Sustainability8(9): 959.
101.
ThimdeeWDeeinGSangrungruangC, et al. (2003) Sources and fate of organic matter in Khung Krabaen Bay (Thailand) as traced by δ13C and C/N atomic ratios. Wetlands23(4): 729–738.
102.
UddinALundbergN (1999) A paleo-Brahmaputra? Subsurface lithofacies analysis of Miocene deltaic sediments in the Himalayan–Bengal system, Bangladesh. Sedimentology Geology123: 239–254.
103.
UmitsuM (1993) Late Quaternary sedimentary environments and landforms in the Ganges Delta. Sedimentary Geology83: 177–186.
104.
WarrickRAAhmedQK (1996) The Implications of Climate and Sea-Level Change for Bangladesh. The Netherlands: Kluwer Academic Publications.
105.
WatsonAJWhitfieldM (1985) Composition of particles in the global ocean. Deep-Sea Research32: 1023–1039.
106.
WheelerHE (1964) Base-level, lithosphere surface, and time stratigraphy. Geological Society of America Bulletin75: 599–610.
107.
WilsonCAGoodbredSLJr (2015) Construction and maintenance of the Ganges-Brahmaputra-Meghna delta: Linking process, morphology, and stratigraphy. The Annual Review of Marine Science7: 67–88.
108.
WoodroffeCDThomBGChappellJ (1985) Development of widespread mangrove swamps in mid-Holocene times in northern Australia. Nature317: 711–713.
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