RESPONSES OF BED MORPHOLOGY TO LARGE WOOD DEPOSITION USING A COMPUTATIONAL HYDRODYNAMIC MODEL

This study develops a numerical model for large wood dynamics in a braided river considering the root wad effect and anisotropic bed friction. The newly developed numerical model can precisely simulate the behavior of large pieces of wood using a 2-dimensional depth-averaged Eulerian flow model that...

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Veröffentlicht in:Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering Ser. B1 (Hydraulic Engineering), 2018, Vol.74(5), pp.I_673-I_678
Hauptverfasser: KANG, Taeun, KIMURA, Ichiro, SHIMIZU, Yasuyuki
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container_title Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering
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creator KANG, Taeun
KIMURA, Ichiro
SHIMIZU, Yasuyuki
description This study develops a numerical model for large wood dynamics in a braided river considering the root wad effect and anisotropic bed friction. The newly developed numerical model can precisely simulate the behavior of large pieces of wood using a 2-dimensional depth-averaged Eulerian flow model that calculates the water flow and bed morphology. We developed a Lagrange-type wood transport model and combined with the flow model, and the applicability of the combined model is examined in a comparison with experimental results. From the simulation results, we quantitatively calculate the Active Braiding Index (ABI), Bed Relief Index (BRI), and averaged values of deposition position and deposition angle. We then analyze the relationship between the bed morphology responses and the wood deposition patterns in terms of the root wad effect and input supply. The proposed model reproduces the prominent features of the flume experiment, indicating that the present numerical approach can clarify and predict the behavior of large pieces of wood in accordance with the bed morphology.
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The newly developed numerical model can precisely simulate the behavior of large pieces of wood using a 2-dimensional depth-averaged Eulerian flow model that calculates the water flow and bed morphology. We developed a Lagrange-type wood transport model and combined with the flow model, and the applicability of the combined model is examined in a comparison with experimental results. From the simulation results, we quantitatively calculate the Active Braiding Index (ABI), Bed Relief Index (BRI), and averaged values of deposition position and deposition angle. We then analyze the relationship between the bed morphology responses and the wood deposition patterns in terms of the root wad effect and input supply. 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The proposed model reproduces the prominent features of the flume experiment, indicating that the present numerical approach can clarify and predict the behavior of large pieces of wood in accordance with the bed morphology.</description><subject>Anisotropic bed friction</subject><subject>Bed morphology with large wood</subject><subject>Bottom friction</subject><subject>Braided rivers</subject><subject>Braiding</subject><subject>Computational hydrodynamic modeling</subject><subject>Computer applications</subject><subject>Computer simulation</subject><subject>Deposition</subject><subject>Flumes</subject><subject>Hydrodynamics</subject><subject>Large wood dynamics</subject><subject>Mathematical models</subject><subject>Morphology</subject><subject>Numerical models</subject><subject>Rivers</subject><subject>Root wad effect</subject><subject>Two dimensional flow</subject><subject>Two dimensional models</subject><subject>Water depth</subject><subject>Water flow</subject><subject>Wood</subject><issn>2185-467X</issn><issn>2185-467X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNpVkE1PwkAQhjdGEwnyBzxt4hncj7a7HmtboUnpNm2JcjCb7bIVGgTcwsF_bxFC9DIzmZnnnckLwD1GI0IQf2xabZqlGTFn5MpYeoxegR7B3B06Hnu7_lPfgkHbriqEPJcTSnEPvOdRkYm0iAooXuBzFMKpyLOJSMR4DksBEz8fR_BViBCGUSaKuIxFCmdFnI6hDwMxzWalf-z5CZzMw1yE89SfxkEnE0bJHbip1bo1g3Pug9lLVAaTYScfB34y1OTp-JqrPFUpTI3Smhjl4UX3HnMWCjnUZa42FaUV4bxGBhOuPVQ5jGKtMFdeVS9oHzycdHd2-3Uw7V4224PddCcloQQzhBh3uy1y2tJ227bW1HJnV5_KfkuM5NFJeXZSMkeeneyg4AQ17V59mAui7H6l1-Y_0oVf6jLVS2Wl2dAf97p5-w</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>KANG, Taeun</creator><creator>KIMURA, Ichiro</creator><creator>SHIMIZU, Yasuyuki</creator><general>Japan Society of Civil Engineers</general><general>Japan Science and Technology Agency</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H96</scope><scope>KR7</scope><scope>L.G</scope></search><sort><creationdate>2018</creationdate><title>RESPONSES OF BED MORPHOLOGY TO LARGE WOOD DEPOSITION USING A COMPUTATIONAL HYDRODYNAMIC MODEL</title><author>KANG, Taeun ; KIMURA, Ichiro ; SHIMIZU, Yasuyuki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2985-45a6aba13eacc2ea61d82374da043575ceb33b288f0e128c60b4731ca18a6bfd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Anisotropic bed friction</topic><topic>Bed morphology with large wood</topic><topic>Bottom friction</topic><topic>Braided rivers</topic><topic>Braiding</topic><topic>Computational hydrodynamic modeling</topic><topic>Computer applications</topic><topic>Computer simulation</topic><topic>Deposition</topic><topic>Flumes</topic><topic>Hydrodynamics</topic><topic>Large wood dynamics</topic><topic>Mathematical models</topic><topic>Morphology</topic><topic>Numerical models</topic><topic>Rivers</topic><topic>Root wad effect</topic><topic>Two dimensional flow</topic><topic>Two dimensional models</topic><topic>Water depth</topic><topic>Water flow</topic><topic>Wood</topic><toplevel>online_resources</toplevel><creatorcontrib>KANG, Taeun</creatorcontrib><creatorcontrib>KIMURA, Ichiro</creatorcontrib><creatorcontrib>SHIMIZU, Yasuyuki</creatorcontrib><collection>CrossRef</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><jtitle>Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KANG, Taeun</au><au>KIMURA, Ichiro</au><au>SHIMIZU, Yasuyuki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>RESPONSES OF BED MORPHOLOGY TO LARGE WOOD DEPOSITION USING A COMPUTATIONAL HYDRODYNAMIC MODEL</atitle><jtitle>Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering</jtitle><addtitle>J. JSCE, Ser. B1</addtitle><date>2018</date><risdate>2018</risdate><volume>74</volume><issue>5</issue><spage>I_673</spage><epage>I_678</epage><pages>I_673-I_678</pages><issn>2185-467X</issn><eissn>2185-467X</eissn><abstract>This study develops a numerical model for large wood dynamics in a braided river considering the root wad effect and anisotropic bed friction. The newly developed numerical model can precisely simulate the behavior of large pieces of wood using a 2-dimensional depth-averaged Eulerian flow model that calculates the water flow and bed morphology. We developed a Lagrange-type wood transport model and combined with the flow model, and the applicability of the combined model is examined in a comparison with experimental results. From the simulation results, we quantitatively calculate the Active Braiding Index (ABI), Bed Relief Index (BRI), and averaged values of deposition position and deposition angle. We then analyze the relationship between the bed morphology responses and the wood deposition patterns in terms of the root wad effect and input supply. The proposed model reproduces the prominent features of the flume experiment, indicating that the present numerical approach can clarify and predict the behavior of large pieces of wood in accordance with the bed morphology.</abstract><cop>Tokyo</cop><pub>Japan Society of Civil Engineers</pub><doi>10.2208/jscejhe.74.5_I_673</doi></addata></record>
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subjects Anisotropic bed friction
Bed morphology with large wood
Bottom friction
Braided rivers
Braiding
Computational hydrodynamic modeling
Computer applications
Computer simulation
Deposition
Flumes
Hydrodynamics
Large wood dynamics
Mathematical models
Morphology
Numerical models
Rivers
Root wad effect
Two dimensional flow
Two dimensional models
Water depth
Water flow
Wood
title RESPONSES OF BED MORPHOLOGY TO LARGE WOOD DEPOSITION USING A COMPUTATIONAL HYDRODYNAMIC MODEL
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