An Experimental Study of Mobile Boundary Transitions in Alluvial Canals
AbstractSelf-formed shape and energy loss taking place at the transition of alluvial canals were studied. Two trapezoidal erodible canals were modeled along with a sudden contraction in a laboratory flume. Experiments were performed under steady flow conditions for almost-uniform coarse sand with av...
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| Veröffentlicht in: | Journal of irrigation and drainage engineering 2022-01, Vol.148 (1) |
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| container_title | Journal of irrigation and drainage engineering |
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| creator | Nikfar, Masoume Hojjat Ansari, Abolfazl Tahershamsi, Ahmad |
| description | AbstractSelf-formed shape and energy loss taking place at the transition of alluvial canals were studied. Two trapezoidal erodible canals were modeled along with a sudden contraction in a laboratory flume. Experiments were performed under steady flow conditions for almost-uniform coarse sand with average grain sizes of 1.2, 0.91, and 0.77 mm and flow rates ranging from 0.0001 to 0.0025 m3/s. The results show that the ultimate self-formed warped transition can be represented by an exponential relation that depends on average grain size and flow rate. For a constant flow rate, the length of transition decreases as the grain size increases, whereas for a constant grain size it increases with increasing flow rate, and the minimum energy loss is obtained at the threshold condition. |
| doi_str_mv | 10.1061/(ASCE)IR.1943-4774.0001631 |
| format | Article |
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Two trapezoidal erodible canals were modeled along with a sudden contraction in a laboratory flume. Experiments were performed under steady flow conditions for almost-uniform coarse sand with average grain sizes of 1.2, 0.91, and 0.77 mm and flow rates ranging from 0.0001 to 0.0025 m3/s. The results show that the ultimate self-formed warped transition can be represented by an exponential relation that depends on average grain size and flow rate. For a constant flow rate, the length of transition decreases as the grain size increases, whereas for a constant grain size it increases with increasing flow rate, and the minimum energy loss is obtained at the threshold condition.</description><identifier>ISSN: 0733-9437</identifier><identifier>EISSN: 1943-4774</identifier><identifier>DOI: 10.1061/(ASCE)IR.1943-4774.0001631</identifier><language>eng</language><publisher>New York: American Society of Civil Engineers</publisher><subject>Alluvial channels ; Canals ; Contraction ; Energy dissipation ; Energy loss ; Flow rates ; Flow velocity ; Flumes ; Grain size ; Particle size ; Steady flow ; Technical Papers</subject><ispartof>Journal of irrigation and drainage engineering, 2022-01, Vol.148 (1)</ispartof><rights>2021 American Society of Civil Engineers</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-a281t-a41b6108327298c826bbcae5c2e1c259c981552df4288050d12947c4e07c4243</cites><orcidid>0000-0002-1936-4803</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttp://ascelibrary.org/doi/pdf/10.1061/(ASCE)IR.1943-4774.0001631$$EPDF$$P50$$Gasce$$H</linktopdf><linktohtml>$$Uhttp://ascelibrary.org/doi/abs/10.1061/(ASCE)IR.1943-4774.0001631$$EHTML$$P50$$Gasce$$H</linktohtml><link.rule.ids>314,777,781,27905,27906,75942,75950</link.rule.ids></links><search><creatorcontrib>Nikfar, Masoume</creatorcontrib><creatorcontrib>Hojjat Ansari, Abolfazl</creatorcontrib><creatorcontrib>Tahershamsi, Ahmad</creatorcontrib><title>An Experimental Study of Mobile Boundary Transitions in Alluvial Canals</title><title>Journal of irrigation and drainage engineering</title><description>AbstractSelf-formed shape and energy loss taking place at the transition of alluvial canals were studied. Two trapezoidal erodible canals were modeled along with a sudden contraction in a laboratory flume. Experiments were performed under steady flow conditions for almost-uniform coarse sand with average grain sizes of 1.2, 0.91, and 0.77 mm and flow rates ranging from 0.0001 to 0.0025 m3/s. The results show that the ultimate self-formed warped transition can be represented by an exponential relation that depends on average grain size and flow rate. For a constant flow rate, the length of transition decreases as the grain size increases, whereas for a constant grain size it increases with increasing flow rate, and the minimum energy loss is obtained at the threshold condition.</description><subject>Alluvial channels</subject><subject>Canals</subject><subject>Contraction</subject><subject>Energy dissipation</subject><subject>Energy loss</subject><subject>Flow rates</subject><subject>Flow velocity</subject><subject>Flumes</subject><subject>Grain size</subject><subject>Particle size</subject><subject>Steady flow</subject><subject>Technical Papers</subject><issn>0733-9437</issn><issn>1943-4774</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp1kF1PwyAUhonRxDn9D0Rv9KITKC3gXW3mXDJjsu2eUEqTLhUmtMb9e2nmx5U35-SQ9znhPABcYzTDKMf3t8WmnN8t1zMsaJpQxugMIYTzFJ-Aye_bKZgglqZJnNk5uAhhFzOUITQBi8LC-efe-PbN2F51cNMP9QG6Br64qu0MfHSDrZU_wK1XNrR962yArYVF1w0fbQRKZVUXLsFZE5u5-u5TsH2ab8vnZPW6WJbFKlGE4z5RFFc5RjwljAiuOcmrSiuTaWKwJpnQguMsI3VDCecoQzUmgjJNDYqF0HQKbo5r9969Dyb0cucGP35AkowLJnIqcEw9HFPauxC8aeQ-3hePkBjJ0ZuUoze5XMvRkRwdyW9vEc6PsAra_K3_If8HvwBTJ3AF</recordid><startdate>20220101</startdate><enddate>20220101</enddate><creator>Nikfar, Masoume</creator><creator>Hojjat Ansari, Abolfazl</creator><creator>Tahershamsi, Ahmad</creator><general>American Society of Civil Engineers</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><orcidid>https://orcid.org/0000-0002-1936-4803</orcidid></search><sort><creationdate>20220101</creationdate><title>An Experimental Study of Mobile Boundary Transitions in Alluvial Canals</title><author>Nikfar, Masoume ; Hojjat Ansari, Abolfazl ; Tahershamsi, Ahmad</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a281t-a41b6108327298c826bbcae5c2e1c259c981552df4288050d12947c4e07c4243</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Alluvial channels</topic><topic>Canals</topic><topic>Contraction</topic><topic>Energy dissipation</topic><topic>Energy loss</topic><topic>Flow rates</topic><topic>Flow velocity</topic><topic>Flumes</topic><topic>Grain size</topic><topic>Particle size</topic><topic>Steady flow</topic><topic>Technical Papers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nikfar, Masoume</creatorcontrib><creatorcontrib>Hojjat Ansari, Abolfazl</creatorcontrib><creatorcontrib>Tahershamsi, Ahmad</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>Journal of irrigation and drainage engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nikfar, Masoume</au><au>Hojjat Ansari, Abolfazl</au><au>Tahershamsi, Ahmad</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>An Experimental Study of Mobile Boundary Transitions in Alluvial Canals</atitle><jtitle>Journal of irrigation and drainage engineering</jtitle><date>2022-01-01</date><risdate>2022</risdate><volume>148</volume><issue>1</issue><issn>0733-9437</issn><eissn>1943-4774</eissn><abstract>AbstractSelf-formed shape and energy loss taking place at the transition of alluvial canals were studied. Two trapezoidal erodible canals were modeled along with a sudden contraction in a laboratory flume. Experiments were performed under steady flow conditions for almost-uniform coarse sand with average grain sizes of 1.2, 0.91, and 0.77 mm and flow rates ranging from 0.0001 to 0.0025 m3/s. The results show that the ultimate self-formed warped transition can be represented by an exponential relation that depends on average grain size and flow rate. For a constant flow rate, the length of transition decreases as the grain size increases, whereas for a constant grain size it increases with increasing flow rate, and the minimum energy loss is obtained at the threshold condition.</abstract><cop>New York</cop><pub>American Society of Civil Engineers</pub><doi>10.1061/(ASCE)IR.1943-4774.0001631</doi><orcidid>https://orcid.org/0000-0002-1936-4803</orcidid></addata></record> |
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| language | eng |
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| source | American Society of Civil Engineers:NESLI2:Journals:2014 |
| subjects | Alluvial channels Canals Contraction Energy dissipation Energy loss Flow rates Flow velocity Flumes Grain size Particle size Steady flow Technical Papers |
| title | An Experimental Study of Mobile Boundary Transitions in Alluvial Canals |
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