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Sedimentology of the modern seasonal lower Ganges River with low inter-annual peak discharge variance, Bangladesh

文献类型：期刊论文

作者Shan, Xin6,7; Shi, Xuefa6,7; Clift, Peter D.5; Seddique, Ashraf Ali4; Liu, Shengfa6,7; Tan, Chengpeng3; Liu, Jianguo2,6; Hasan, Rased4; Li, Jingrui6,7; Song, Zhaojun1,6
刊名JOURNAL OF THE GEOLOGICAL SOCIETY
出版日期2020-11-05
页码18
ISSN号0016-7649
DOI10.1144/jgs2020-094
英文摘要The Ganges River, one of the largest rivers on Earth, is a typical monsoonal and flood-controlled system but has low inter-annual peak discharge variability. The seasonal discharge can reach 70 000 m(3) s(-1) during the wet season but maintains a low base flow of 500-3000 m(3) s(-1) during the dry season. However, the constancy in peak discharge every year categorizes the lower Ganges River as a river with low inter-annual peak discharge variability. This paper examines the modern lower Ganges River by conducting a detailed process-oriented investigation of the main channel, channel margin and overbank deposits, supplemented by satellite image observation and comparison with other modern fluvial systems. The channel and braid bar deposits show a dominance of small-scale to medium-scale cross-sets, with a variety of accretion processes constructing braid bars. The braid bar and channel deposits are typical of facies models of rivers with low inter-annual peak discharge variance. In contrast, the channel flank deposits are dominated by planar lamination, massive sand and mud couplets, and some ripple cross-lamination, with very little cross-bedding. Characteristic channel margin deposits represent sediments that accumulated by high-speed flows, multiple-surge and rapidly depositing flows, rapid or regular waning flows and hyperconcentrated flows. The overbank deposits predominantly comprise current ripples with long, thin bedforms and soft sediment deformation structures, which record flow transformation on the muddy flat topography and the processes of an unstable river bank. Our study shows that the channel margin and floodplain deposits are entirely different from those of the braid bar and channel. The bedform distribution of the fluvial deposits here (main channel, channel margin and overbank) may be an important tool in the identification of similar seasonal rivers with low inter-annual peak discharge variance and in the interpretation of fluvial processes.
WOS关键词TROPICAL BURDEKIN RIVER ; STAGE PLANE BEDS ; SAND BRAID-BAR ; NORTH QUEENSLAND ; FLUVIAL SYSTEMS ; FLOOD DEPOSITS ; CLIMATE-CHANGE ; JAMUNA RIVER ; FACIES MODEL ; WATER FLOWS
资助项目National Natural Science Foundation of China[U1606401] ; National Natural Science Foundation of China[41676054] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-03] ; National Programme on Global Change and Air-Sea Interaction[GASI-02-INDCJ05] ; Taishan Scholar Program of Shandong
WOS研究方向Geology
语种英语
WOS记录号WOS:000586833300001
出版者GEOLOGICAL SOC PUBL HOUSE
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Programme on Global Change and Air-Sea Interaction ; National Programme on Global Change and Air-Sea Interaction ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Programme on Global Change and Air-Sea Interaction ; National Programme on Global Change and Air-Sea Interaction ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Programme on Global Change and Air-Sea Interaction ; National Programme on Global Change and Air-Sea Interaction ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Programme on Global Change and Air-Sea Interaction ; National Programme on Global Change and Air-Sea Interaction ; Taishan Scholar Program of Shandong ; Taishan Scholar Program of Shandong
源URL[http://ir.iggcas.ac.cn/handle/132A11/98712]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Shi, Xuefa
作者单位1.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China
2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
4.Jatiya Kabi Kazi Nazrul Islam Univ, Dept Environm Sci & Engn, Trishal 2220, Mymensingh, Bangladesh
5.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA
6.Pilot Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China
7.Minist Nat Resources, Key Lab Marine Geol & Met, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Shan, Xin,Shi, Xuefa,Clift, Peter D.,et al. Sedimentology of the modern seasonal lower Ganges River with low inter-annual peak discharge variance, Bangladesh[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2020:18.
APA Shan, Xin.,Shi, Xuefa.,Clift, Peter D..,Seddique, Ashraf Ali.,Liu, Shengfa.,...&Song, Zhaojun.(2020).Sedimentology of the modern seasonal lower Ganges River with low inter-annual peak discharge variance, Bangladesh.JOURNAL OF THE GEOLOGICAL SOCIETY,18.
MLA Shan, Xin,et al."Sedimentology of the modern seasonal lower Ganges River with low inter-annual peak discharge variance, Bangladesh".JOURNAL OF THE GEOLOGICAL SOCIETY (2020):18.

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来源：地质与地球物理研究所

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