ANALYSIS ON DIURNAL VARIATIONS OF HEAVY RAINFALL FEATURES IN KYUSHU, JAPAN, USING SELF-ORGANIZING MAP
The first aim of this study is to investigate the features of diurnal variations in heavy rainfall frequency, and to relate them to typical meteorological fields during a warm season in Kyushu, Japan, using Self-Organizing Map (SOM). The result showed a tendency of higher heavy rainfall frequency in...
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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), 2021, Vol.77(2), pp.I_1135-I_1140 |
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| container_title | Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering |
| container_volume | 77 |
| creator | NISHIYAMA, Koji SHIROZU, Hajime ASAI, Koji |
| description | The first aim of this study is to investigate the features of diurnal variations in heavy rainfall frequency, and to relate them to typical meteorological fields during a warm season in Kyushu, Japan, using Self-Organizing Map (SOM). The result showed a tendency of higher heavy rainfall frequency in the morning compared with in the afternoon. The meteorological field patterns are characterized by the inflow of warm and humid air into frontal area. The second aim of this study is to clarify significant relationships between heavy rainfall hours of the day and disasters cases which occurred in Kyushu during 2006 and 2020 using the first and second maxima of heavy rainfall scale and hourly rainfall recorded in each hour. One of the trends is characterized by widespread and local heavy rainfall in the morning including sleeping time and in the daytime, respectively. Actually, the time-dependent features are true of disaster cases including 2017 and 2020 disaster cases in Kyushu. Therefore, the findings provide strong evidence for night-time disaster prevention in Kyushu. |
| doi_str_mv | 10.2208/jscejhe.77.2_I_1135 |
| format | Article |
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The result showed a tendency of higher heavy rainfall frequency in the morning compared with in the afternoon. The meteorological field patterns are characterized by the inflow of warm and humid air into frontal area. The second aim of this study is to clarify significant relationships between heavy rainfall hours of the day and disasters cases which occurred in Kyushu during 2006 and 2020 using the first and second maxima of heavy rainfall scale and hourly rainfall recorded in each hour. One of the trends is characterized by widespread and local heavy rainfall in the morning including sleeping time and in the daytime, respectively. Actually, the time-dependent features are true of disaster cases including 2017 and 2020 disaster cases in Kyushu. 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B1</addtitle><description>The first aim of this study is to investigate the features of diurnal variations in heavy rainfall frequency, and to relate them to typical meteorological fields during a warm season in Kyushu, Japan, using Self-Organizing Map (SOM). The result showed a tendency of higher heavy rainfall frequency in the morning compared with in the afternoon. The meteorological field patterns are characterized by the inflow of warm and humid air into frontal area. The second aim of this study is to clarify significant relationships between heavy rainfall hours of the day and disasters cases which occurred in Kyushu during 2006 and 2020 using the first and second maxima of heavy rainfall scale and hourly rainfall recorded in each hour. One of the trends is characterized by widespread and local heavy rainfall in the morning including sleeping time and in the daytime, respectively. Actually, the time-dependent features are true of disaster cases including 2017 and 2020 disaster cases in Kyushu. Therefore, the findings provide strong evidence for night-time disaster prevention in Kyushu.</description><subject>Disasters</subject><subject>Diurnal variations</subject><subject>Emergency preparedness</subject><subject>heavy rainfall disaster</subject><subject>Humid areas</subject><subject>Inflow</subject><subject>meteorological field</subject><subject>Morning</subject><subject>pattern recognition</subject><subject>Rain</subject><subject>Rainfall</subject><subject>Self organizing maps</subject><subject>Self-Organizing Map</subject><subject>Time dependence</subject><issn>2185-467X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNo9UE9vgjAcbZYsmXF-gl2a7CoOWkrLsVHQbqwYEDN3aUotU-LUgR727YfR7PJ7eX_ye8kD4MlzRwi57KVuja03dkTpCCmhPA-TO9BDHiOOH9CPBzBo223pugFhCGOvByyXPFnlIoephBNRZB2FS54JvhCp7NQYziK-XMGMCxnzJIFxxBdFFuVQSPi2KvJZMYSvfM7lEBa5kFOYR0nspNmUS_F54e98_gjuK71r7eCGfZDH0WI8c5J0KsY8cWoWhg5CRvu0Ika7OiwrH2O8djEm2AYhMWxN0ZqUZRVgg6kONUFBJ5bIsMAQzye4D56vX4_N4eds25OqD-dm3xUqFGCfMeSFYZeaXFN1e9JfVh2b7bdufpVuTluzs-o2oaJUocu5rvhvm41ulN3jP2C6aGU</recordid><startdate>2021</startdate><enddate>2021</enddate><creator>NISHIYAMA, Koji</creator><creator>SHIROZU, Hajime</creator><creator>ASAI, Koji</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>2021</creationdate><title>ANALYSIS ON DIURNAL VARIATIONS OF HEAVY RAINFALL FEATURES IN KYUSHU, JAPAN, USING SELF-ORGANIZING MAP</title><author>NISHIYAMA, Koji ; SHIROZU, Hajime ; ASAI, Koji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j899-22ca47f5ca0a9bf4333d03353e695c8d72d5bbf63c37a9a526c8db2c86c51453</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>jpn</language><creationdate>2021</creationdate><topic>Disasters</topic><topic>Diurnal variations</topic><topic>Emergency preparedness</topic><topic>heavy rainfall disaster</topic><topic>Humid areas</topic><topic>Inflow</topic><topic>meteorological field</topic><topic>Morning</topic><topic>pattern recognition</topic><topic>Rain</topic><topic>Rainfall</topic><topic>Self organizing maps</topic><topic>Self-Organizing Map</topic><topic>Time dependence</topic><toplevel>online_resources</toplevel><creatorcontrib>NISHIYAMA, Koji</creatorcontrib><creatorcontrib>SHIROZU, Hajime</creatorcontrib><creatorcontrib>ASAI, Koji</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>NISHIYAMA, Koji</au><au>SHIROZU, Hajime</au><au>ASAI, Koji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>ANALYSIS ON DIURNAL VARIATIONS OF HEAVY RAINFALL FEATURES IN KYUSHU, JAPAN, USING SELF-ORGANIZING MAP</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>2021</date><risdate>2021</risdate><volume>77</volume><issue>2</issue><spage>I_1135</spage><epage>I_1140</epage><pages>I_1135-I_1140</pages><eissn>2185-467X</eissn><abstract>The first aim of this study is to investigate the features of diurnal variations in heavy rainfall frequency, and to relate them to typical meteorological fields during a warm season in Kyushu, Japan, using Self-Organizing Map (SOM). The result showed a tendency of higher heavy rainfall frequency in the morning compared with in the afternoon. The meteorological field patterns are characterized by the inflow of warm and humid air into frontal area. The second aim of this study is to clarify significant relationships between heavy rainfall hours of the day and disasters cases which occurred in Kyushu during 2006 and 2020 using the first and second maxima of heavy rainfall scale and hourly rainfall recorded in each hour. One of the trends is characterized by widespread and local heavy rainfall in the morning including sleeping time and in the daytime, respectively. Actually, the time-dependent features are true of disaster cases including 2017 and 2020 disaster cases in Kyushu. Therefore, the findings provide strong evidence for night-time disaster prevention in Kyushu.</abstract><cop>Tokyo</cop><pub>Japan Society of Civil Engineers</pub><doi>10.2208/jscejhe.77.2_I_1135</doi></addata></record> |
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| ispartof | Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 2021, Vol.77(2), pp.I_1135-I_1140 |
| issn | 2185-467X |
| language | jpn |
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| source | Alma/SFX Local Collection |
| subjects | Disasters Diurnal variations Emergency preparedness heavy rainfall disaster Humid areas Inflow meteorological field Morning pattern recognition Rain Rainfall Self organizing maps Self-Organizing Map Time dependence |
| title | ANALYSIS ON DIURNAL VARIATIONS OF HEAVY RAINFALL FEATURES IN KYUSHU, JAPAN, USING SELF-ORGANIZING MAP |
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