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 |
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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. |
doi_str_mv | 10.2208/jscejhe.74.5_I_673 |
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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. 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><identifier>ISSN: 2185-467X</identifier><identifier>EISSN: 2185-467X</identifier><identifier>DOI: 10.2208/jscejhe.74.5_I_673</identifier><language>eng</language><publisher>Tokyo: Japan Society of Civil Engineers</publisher><subject>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</subject><ispartof>Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 2018, Vol.74(5), pp.I_673-I_678</ispartof><rights>2018 Japan Society of Civil Engineers</rights><rights>Copyright Japan Science and Technology Agency 2018</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c2985-45a6aba13eacc2ea61d82374da043575ceb33b288f0e128c60b4731ca18a6bfd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,4009,27902,27903,27904</link.rule.ids></links><search><creatorcontrib>KANG, Taeun</creatorcontrib><creatorcontrib>KIMURA, Ichiro</creatorcontrib><creatorcontrib>SHIMIZU, Yasuyuki</creatorcontrib><title>RESPONSES OF BED MORPHOLOGY TO LARGE WOOD DEPOSITION USING A COMPUTATIONAL HYDRODYNAMIC MODEL</title><title>Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering</title><addtitle>J. JSCE, Ser. B1</addtitle><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.</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 & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & 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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