EXPERIMENTAL STUDY ON THE EFFECT OF ANISOTROPY OF POROSITY IN A CALCULATION GRID ON A FLOOD INUNDATION PATTERN
To enhance the soft-countermeasure on increasing heavy rain and disaster, research on increasing the accuracy of two-dimensional (2D) flood inundation model is necessary. The objective of this study is to grasp the effect of anisotropy of porosity in calculation grid on a flood inundation pattern by...
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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_1537-I_1542 |
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| container_title | Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering |
| container_volume | 74 |
| creator | ONAI, Aki TANAKA, Norio FUSHIMI, Kengo IKAI, Satoshi |
| description | To enhance the soft-countermeasure on increasing heavy rain and disaster, research on increasing the accuracy of two-dimensional (2D) flood inundation model is necessary. The objective of this study is to grasp the effect of anisotropy of porosity in calculation grid on a flood inundation pattern by comparing a hydraulic model experiment with numerical simulations by a 2D flood inundation model wich includes an isotropic porosity in each grid. In experiments, anisotropy was represented by changing the aspect ratio of large roughness elements mounted on a plain. Large velocity differences was observed for the propagation speed of floods in the experiments on the floodplain model with the shape of the roughness elements. Numerical simulation results demonstrated that the difference could be represented by changing the drag coefficient, however, the tip of the inundation current, and the reflection or shielding effect by the elements could not. The needs are clearly shown to develop the anisotropy effect in the numerical model. |
| doi_str_mv | 10.2208/jscejhe.74.5_I_1537 |
| format | Article |
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The objective of this study is to grasp the effect of anisotropy of porosity in calculation grid on a flood inundation pattern by comparing a hydraulic model experiment with numerical simulations by a 2D flood inundation model wich includes an isotropic porosity in each grid. In experiments, anisotropy was represented by changing the aspect ratio of large roughness elements mounted on a plain. Large velocity differences was observed for the propagation speed of floods in the experiments on the floodplain model with the shape of the roughness elements. Numerical simulation results demonstrated that the difference could be represented by changing the drag coefficient, however, the tip of the inundation current, and the reflection or shielding effect by the elements could not. The needs are clearly shown to develop the anisotropy effect in the numerical model.</description><identifier>EISSN: 2185-467X</identifier><identifier>DOI: 10.2208/jscejhe.74.5_I_1537</identifier><language>jpn</language><publisher>Tokyo: Japan Society of Civil Engineers</publisher><subject>analysis of inundation ; Anisotropy ; anisotropy of porosity ; Aspect ratio ; Computer simulation ; Disaster studies ; Drag coefficient ; Drag coefficients ; Floodplains ; Floods ; fluid force ; Hydraulic models ; inundation height ; Mathematical models ; Model accuracy ; Numerical models ; Porosity ; Rainfall ; Roughness ; shape of inundation ; Shielding ; Two dimensional models</subject><ispartof>Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 2018, Vol.74(5), pp.I_1537-I_1542</ispartof><rights>2018 Japan Society of Civil Engineers</rights><rights>Copyright Japan Science and Technology Agency 2018</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,4024,27923,27924,27925</link.rule.ids></links><search><creatorcontrib>ONAI, Aki</creatorcontrib><creatorcontrib>TANAKA, Norio</creatorcontrib><creatorcontrib>FUSHIMI, Kengo</creatorcontrib><creatorcontrib>IKAI, Satoshi</creatorcontrib><title>EXPERIMENTAL STUDY ON THE EFFECT OF ANISOTROPY OF POROSITY IN A CALCULATION GRID ON A FLOOD INUNDATION PATTERN</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>To enhance the soft-countermeasure on increasing heavy rain and disaster, research on increasing the accuracy of two-dimensional (2D) flood inundation model is necessary. The objective of this study is to grasp the effect of anisotropy of porosity in calculation grid on a flood inundation pattern by comparing a hydraulic model experiment with numerical simulations by a 2D flood inundation model wich includes an isotropic porosity in each grid. In experiments, anisotropy was represented by changing the aspect ratio of large roughness elements mounted on a plain. Large velocity differences was observed for the propagation speed of floods in the experiments on the floodplain model with the shape of the roughness elements. Numerical simulation results demonstrated that the difference could be represented by changing the drag coefficient, however, the tip of the inundation current, and the reflection or shielding effect by the elements could not. The needs are clearly shown to develop the anisotropy effect in the numerical model.</description><subject>analysis of inundation</subject><subject>Anisotropy</subject><subject>anisotropy of porosity</subject><subject>Aspect ratio</subject><subject>Computer simulation</subject><subject>Disaster studies</subject><subject>Drag coefficient</subject><subject>Drag coefficients</subject><subject>Floodplains</subject><subject>Floods</subject><subject>fluid force</subject><subject>Hydraulic models</subject><subject>inundation height</subject><subject>Mathematical models</subject><subject>Model accuracy</subject><subject>Numerical models</subject><subject>Porosity</subject><subject>Rainfall</subject><subject>Roughness</subject><subject>shape of inundation</subject><subject>Shielding</subject><subject>Two dimensional models</subject><issn>2185-467X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNo9UM9rgzAUDoPBSte_YJfAznbGqDFH0dgKzoim0J5CTONa6dpO28P--ymWXd7j8f3ifQC8IXvpOHbw0fbatAezJO7Sk6lEHiZPYOagwLNcn2xfwKLvj7Vt-17gYIxm4My2BSvTT5aLMIOV2MQ7yHMo1gyyJGGRgDyBYZ5WXJS82I1XwUtepWIH0xyGMAqzaJOFIh1UqzKNR3UIk4zzeCBs8niCilAIVuav4LlRp94sHnsOqoSJaG1lfJUOVlYbUGxpRYOaBLj2bYVq1Oyx9l2baB14mJqGqoYQ3SC69zHZ44Yi31NGU4JsrBCleA7eJ9drd_m5m_4m28u9Ow-B0sEO8qk7fj8H8cRq-5v6MvLaHb9V9ytVdzvqk5GPLiVxpTeOqc5_WB9UJ80Z_wEF4Gr3</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>ONAI, Aki</creator><creator>TANAKA, Norio</creator><creator>FUSHIMI, Kengo</creator><creator>IKAI, Satoshi</creator><general>Japan Society of Civil Engineers</general><general>Japan Science and Technology Agency</general><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>EXPERIMENTAL STUDY ON THE EFFECT OF ANISOTROPY OF POROSITY IN A CALCULATION GRID ON A FLOOD INUNDATION PATTERN</title><author>ONAI, Aki ; TANAKA, Norio ; FUSHIMI, Kengo ; IKAI, Satoshi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j893-ca98b783b60a1b1fd3c6407cc8539ef9af77cf19d637d3f9165aec97103a1993</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>jpn</language><creationdate>2018</creationdate><topic>analysis of inundation</topic><topic>Anisotropy</topic><topic>anisotropy of porosity</topic><topic>Aspect ratio</topic><topic>Computer simulation</topic><topic>Disaster studies</topic><topic>Drag coefficient</topic><topic>Drag coefficients</topic><topic>Floodplains</topic><topic>Floods</topic><topic>fluid force</topic><topic>Hydraulic models</topic><topic>inundation height</topic><topic>Mathematical models</topic><topic>Model accuracy</topic><topic>Numerical models</topic><topic>Porosity</topic><topic>Rainfall</topic><topic>Roughness</topic><topic>shape of inundation</topic><topic>Shielding</topic><topic>Two dimensional models</topic><toplevel>online_resources</toplevel><creatorcontrib>ONAI, Aki</creatorcontrib><creatorcontrib>TANAKA, Norio</creatorcontrib><creatorcontrib>FUSHIMI, Kengo</creatorcontrib><creatorcontrib>IKAI, Satoshi</creatorcontrib><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>ONAI, Aki</au><au>TANAKA, Norio</au><au>FUSHIMI, Kengo</au><au>IKAI, Satoshi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>EXPERIMENTAL STUDY ON THE EFFECT OF ANISOTROPY OF POROSITY IN A CALCULATION GRID ON A FLOOD INUNDATION PATTERN</atitle><jtitle>Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering</jtitle><addtitle>J. JSCE, Ser. 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Numerical simulation results demonstrated that the difference could be represented by changing the drag coefficient, however, the tip of the inundation current, and the reflection or shielding effect by the elements could not. The needs are clearly shown to develop the anisotropy effect in the numerical model.</abstract><cop>Tokyo</cop><pub>Japan Society of Civil Engineers</pub><doi>10.2208/jscejhe.74.5_I_1537</doi></addata></record> |
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| ispartof | Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 2018, Vol.74(5), pp.I_1537-I_1542 |
| issn | 2185-467X |
| language | jpn |
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| source | Alma/SFX Local Collection |
| subjects | analysis of inundation Anisotropy anisotropy of porosity Aspect ratio Computer simulation Disaster studies Drag coefficient Drag coefficients Floodplains Floods fluid force Hydraulic models inundation height Mathematical models Model accuracy Numerical models Porosity Rainfall Roughness shape of inundation Shielding Two dimensional models |
| title | EXPERIMENTAL STUDY ON THE EFFECT OF ANISOTROPY OF POROSITY IN A CALCULATION GRID ON A FLOOD INUNDATION PATTERN |
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