Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions
The Teesta River originates from the Higher Himalayas, flows through India and Bangladesh and transports huge sediments to the Brahmaputra-Jamuna River. Geomorphologically, the Teesta River shows braided in nature with different types of bars and floodplains. This study incorporates both the exposed...
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Department of Geological Sciences, Jahangirnagar University
2023
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| author | SOHAN, MD. SHOHANUR RAHMAN YEASMIN, RUMANA RAHMAN, M. JULLEH JALALUR SAYEM, ABU SADAT MD. RANA, MD. SOHEL |
| author_facet | SOHAN, MD. SHOHANUR RAHMAN YEASMIN, RUMANA RAHMAN, M. JULLEH JALALUR SAYEM, ABU SADAT MD. RANA, MD. SOHEL |
| author_sort | SOHAN, MD. SHOHANUR RAHMAN |
| collection | OJS |
| description | The Teesta River originates from the Higher Himalayas, flows through India and Bangladesh and transports huge sediments to the Brahmaputra-Jamuna River. Geomorphologically, the Teesta River shows braided in nature with different types of bars and floodplains. This study incorporates both the exposed sands from river banks and bars as well as subsurface borehole samples of the Teesta River with the aim of sedimentological characterization of these sediments which further assist to understand their history of transportation and deposition. The sand deposits of the Teesta River can be categorized into seven distinct lithofacies: trough cross- stratified sand (St), planar cross-stratified sand (Sp), massive sand (Sm), ripple cross-laminated sand (Sr), parallel laminated sand (Sh), massive clay (Fm) and laminated clay (Fl), which grouped into multiple fining-upward sequences, indicating periodic decrease in flow velocities as well as shifting of channels and bars. The sand deposits from channels and bars show mostly unimodal in nature which suggests unidirectional current flow, although evidence of minor redistribution by chute channels has been observed. The textural characteristics of these Teesta River sands consist of fine to medium grained, moderately well sorted to well sorted, dominantly positively skewed and leptokurtic to mesokurtic in nature. These sands are dominantly bedload deposits and have been transported predominantly by saltation process with subordinate suspension process, while traction processes are limited mainly in the upper reaches of the river. Various bivariate diagrams indicate that these sediments were deposited in low to medium level of energy conditions. |
| format | Online |
| id | ojs-186 |
| institution | My University |
| language | eng |
| publishDate | 2023 |
| publisher | Department of Geological Sciences, Jahangirnagar University |
| record_format | ojs |
| spelling | ojs-1862025-09-11T06:02:32Z Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions SOHAN, MD. SHOHANUR RAHMAN YEASMIN, RUMANA RAHMAN, M. JULLEH JALALUR SAYEM, ABU SADAT MD. RANA, MD. SOHEL Teesta River braided river sedimentary processes lithofacies The Teesta River originates from the Higher Himalayas, flows through India and Bangladesh and transports huge sediments to the Brahmaputra-Jamuna River. Geomorphologically, the Teesta River shows braided in nature with different types of bars and floodplains. This study incorporates both the exposed sands from river banks and bars as well as subsurface borehole samples of the Teesta River with the aim of sedimentological characterization of these sediments which further assist to understand their history of transportation and deposition. The sand deposits of the Teesta River can be categorized into seven distinct lithofacies: trough cross- stratified sand (St), planar cross-stratified sand (Sp), massive sand (Sm), ripple cross-laminated sand (Sr), parallel laminated sand (Sh), massive clay (Fm) and laminated clay (Fl), which grouped into multiple fining-upward sequences, indicating periodic decrease in flow velocities as well as shifting of channels and bars. The sand deposits from channels and bars show mostly unimodal in nature which suggests unidirectional current flow, although evidence of minor redistribution by chute channels has been observed. The textural characteristics of these Teesta River sands consist of fine to medium grained, moderately well sorted to well sorted, dominantly positively skewed and leptokurtic to mesokurtic in nature. These sands are dominantly bedload deposits and have been transported predominantly by saltation process with subordinate suspension process, while traction processes are limited mainly in the upper reaches of the river. Various bivariate diagrams indicate that these sediments were deposited in low to medium level of energy conditions. Department of Geological Sciences, Jahangirnagar University 2023-12-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Conference Proceedings Submission application/pdf http://journals.juniv.edu/index.php/bgj/article/view/186 10.59185/bgj.v29i1.186 Bangladesh Geoscience Journal; Vol. 29 No. 1 (2023); 1-20 1028-6845 10.59185/bgj.v29i1 eng http://journals.juniv.edu/index.php/bgj/article/view/186/131 Copyright (c) 2023 Bangladesh Geoscience Journal |
| spellingShingle | Teesta River braided river sedimentary processes lithofacies SOHAN, MD. SHOHANUR RAHMAN YEASMIN, RUMANA RAHMAN, M. JULLEH JALALUR SAYEM, ABU SADAT MD. RANA, MD. SOHEL Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions |
| title | Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions |
| title_full | Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions |
| title_fullStr | Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions |
| title_full_unstemmed | Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions |
| title_short | Sedimentological characterizations of Recent sediments from the Teesta River, Bangladesh: implication for sediment transportation and depositional conditions |
| title_sort | sedimentological characterizations of recent sediments from the teesta river bangladesh implication for sediment transportation and depositional conditions |
| topic | Teesta River braided river sedimentary processes lithofacies |
| topic_facet | Teesta River braided river sedimentary processes lithofacies |
| url | http://journals.juniv.edu/index.php/bgj/article/view/186 |
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