Employment of hydraulic model and social media data for flood hazard assessment in an urban city
Study regionAn urban city in the coastal region of East Japan.Study focusThis study implemented the hydraulic model to investigate the flood events in Mobara city, Japan. The model was calibrated by the flood on July 1, 1970, and then validated against the flood on October 25, 2019. Simulated flood...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Journal of Hydrology: Regional Studies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581822002749 |
| _version_ | 1828094351885991936 |
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| author | Mao Ouyang Shunji Kotsuki Yuka Ito Tomochika Tokunaga |
| author_facet | Mao Ouyang Shunji Kotsuki Yuka Ito Tomochika Tokunaga |
| author_sort | Mao Ouyang |
| collection | DOAJ |
| description | Study regionAn urban city in the coastal region of East Japan.Study focusThis study implemented the hydraulic model to investigate the flood events in Mobara city, Japan. The model was calibrated by the flood on July 1, 1970, and then validated against the flood on October 25, 2019. Simulated flood extent and temporal changes of water depths agreed well with the observations from social media data, suggesting that the hydraulic model could reproduce floods in the study area. Comparison of the two flood events indicated that the areal extent of flood increased by a factor of 5.5 over the 50-year period, caused by the changes of land use/land covers, topographies, and input river water levels.New hydrological insights for the regionIntensive rainfall-induced fluvial floods have caused catastrophic repercussions in urban areas. One of the major challenges in urban flood simulations is lack of field observations to evaluate the performance of numerical models. Our study highlights the possibility of employing hydraulic model and social media data to reduce the uncertainty in flood simulation, and the necessity of considering the temporal changes of land use/land covers, topographies, and input river water levels for flood mapping in urban cities. |
| first_indexed | 2024-04-11T06:57:41Z |
| format | Article |
| id | doaj.art-49c149c67e7e461d9330012c5532ad65 |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-04-11T06:57:41Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-49c149c67e7e461d9330012c5532ad652022-12-22T04:38:57ZengElsevierJournal of Hydrology: Regional Studies2214-58182022-12-0144101261Employment of hydraulic model and social media data for flood hazard assessment in an urban cityMao Ouyang0Shunji Kotsuki1Yuka Ito2Tomochika Tokunaga3Center for Environmental Remote Sensing, Chiba University, Chiba 263–8522, Japan; Corresponding author.Center for Environmental Remote Sensing, Chiba University, Chiba 263–8522, Japan; RIKEN Center for Computational Science, Kobe 650–0047, Japan; Institute for Advanced Academic Research, Chiba University, Chiba 263–8522, JapanDepartment of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277–8563, JapanDepartment of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277–8563, JapanStudy regionAn urban city in the coastal region of East Japan.Study focusThis study implemented the hydraulic model to investigate the flood events in Mobara city, Japan. The model was calibrated by the flood on July 1, 1970, and then validated against the flood on October 25, 2019. Simulated flood extent and temporal changes of water depths agreed well with the observations from social media data, suggesting that the hydraulic model could reproduce floods in the study area. Comparison of the two flood events indicated that the areal extent of flood increased by a factor of 5.5 over the 50-year period, caused by the changes of land use/land covers, topographies, and input river water levels.New hydrological insights for the regionIntensive rainfall-induced fluvial floods have caused catastrophic repercussions in urban areas. One of the major challenges in urban flood simulations is lack of field observations to evaluate the performance of numerical models. Our study highlights the possibility of employing hydraulic model and social media data to reduce the uncertainty in flood simulation, and the necessity of considering the temporal changes of land use/land covers, topographies, and input river water levels for flood mapping in urban cities.http://www.sciencedirect.com/science/article/pii/S2214581822002749Social media dataHydraulic modelLand use/land coverInput river water levelUrban floodSoil infiltration |
| spellingShingle | Mao Ouyang Shunji Kotsuki Yuka Ito Tomochika Tokunaga Employment of hydraulic model and social media data for flood hazard assessment in an urban city Journal of Hydrology: Regional Studies Social media data Hydraulic model Land use/land cover Input river water level Urban flood Soil infiltration |
| title | Employment of hydraulic model and social media data for flood hazard assessment in an urban city |
| title_full | Employment of hydraulic model and social media data for flood hazard assessment in an urban city |
| title_fullStr | Employment of hydraulic model and social media data for flood hazard assessment in an urban city |
| title_full_unstemmed | Employment of hydraulic model and social media data for flood hazard assessment in an urban city |
| title_short | Employment of hydraulic model and social media data for flood hazard assessment in an urban city |
| title_sort | employment of hydraulic model and social media data for flood hazard assessment in an urban city |
| topic | Social media data Hydraulic model Land use/land cover Input river water level Urban flood Soil infiltration |
| url | http://www.sciencedirect.com/science/article/pii/S2214581822002749 |
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