SEDIMENT TRANSPORT CAPACITY -AN IMPROVED BAGNOLD FORMULA
This paper re-examines Bagnold's theorem of sediment transport. Different from the stream power defined by Bagnold, i.e., τoV, this study shows that the total load of sediment-laden flow, gt, is related to near bed energy dissipation rate, i.e., τou*. An attempt is made to explain the empirical rela...
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Veröffentlicht in: | International journal of sediment research 2007-03, Vol.22 (1), p.27-38 |
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description | This paper re-examines Bagnold's theorem of sediment transport. Different from the stream power defined by Bagnold, i.e., τoV, this study shows that the total load of sediment-laden flow, gt, is related to near bed energy dissipation rate, i.e., τou*. An attempt is made to explain the empirical relation. The ratio (=k) of measured total load, gt, to the product of near bed velocity, u*, and energy dissipation rate, τoU*, is analyzed. It is found that k is independent of the Rouse number, Z, if Z is greater than 2.6, but the coefficient k decreases with the increase of Z when Z 〈 2.6. An empirical relation between k and Z is developed. A systematic and thorough analysis of 1,458 sets of data collected from 16 rivers and canals confirms that the proposed formula can be used to compute the total load with accuracy. |
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Different from the stream power defined by Bagnold, i.e., τoV, this study shows that the total load of sediment-laden flow, gt, is related to near bed energy dissipation rate, i.e., τou*. An attempt is made to explain the empirical relation. The ratio (=k) of measured total load, gt, to the product of near bed velocity, u*, and energy dissipation rate, τoU*, is analyzed. It is found that k is independent of the Rouse number, Z, if Z is greater than 2.6, but the coefficient k decreases with the increase of Z when Z 〈 2.6. An empirical relation between k and Z is developed. A systematic and thorough analysis of 1,458 sets of data collected from 16 rivers and canals confirms that the proposed formula can be used to compute the total load with accuracy.</description><subject>总输沙量</subject><subject>改良BAGNOLD公式</subject><subject>输沙能力</subject><issn>1001-6279</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNotz09LwzAYBvAcFJzT7xC8eSi8b9ol6TG23Sz0H10neCpp0tTV0aFVxG9vYZ6ey4_n4bkiKwRAjzMR3pDbeR4B_FDKYEXkPonTPCka2tSq2Fdl3dBIVSpKm1fqqYKmeVWXL0lMn9SuKLOYbss6P2Tqjlw7fZr7-_9ck8M2aaJnLyt3aaQyzzDkX55jobU68CUwDejQiNAaDdxoKRCxCwx2vZVGs1B0OnQi2HDOcOOs5SA099fk8dL7oyenp6Edz9-f07LYDuM0_45tzwAELP_8xT5crHk7T8PHcdGdNu_ueOpbFiAKBPT_AFbZSaA</recordid><startdate>20070301</startdate><enddate>20070301</enddate><creator>Shu-Qing YANG Sung-Cheol KOH In-Soo KIM Young-Chae SONG</creator><general>School of Environmental Science and Engrg., South China Univ. of Technology, Wusan, Guangzhou, P. 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Different from the stream power defined by Bagnold, i.e., τoV, this study shows that the total load of sediment-laden flow, gt, is related to near bed energy dissipation rate, i.e., τou*. An attempt is made to explain the empirical relation. The ratio (=k) of measured total load, gt, to the product of near bed velocity, u*, and energy dissipation rate, τoU*, is analyzed. It is found that k is independent of the Rouse number, Z, if Z is greater than 2.6, but the coefficient k decreases with the increase of Z when Z 〈 2.6. An empirical relation between k and Z is developed. A systematic and thorough analysis of 1,458 sets of data collected from 16 rivers and canals confirms that the proposed formula can be used to compute the total load with accuracy.</abstract><pub>School of Environmental Science and Engrg., South China Univ. of Technology, Wusan, Guangzhou, P. R. of China, 510006%College of Engrg., Korea Maritime Univ., Busan, Korea 606791</pub><tpages>12</tpages></addata></record> |
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source | Alma/SFX Local Collection |
subjects | 总输沙量 改良BAGNOLD公式 输沙能力 |
title | SEDIMENT TRANSPORT CAPACITY -AN IMPROVED BAGNOLD FORMULA |
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