Development of a Flood Simulator for a Flood Risk Communication Tool

Yamaguchi, Satoshi; Muro, K.; Iwamura, Kazuaki

doi:10.2208/prohe.49.421

Cited by 3 publications

(4 citation statements)

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“…The effectiveness of these models has been confirmed through various validations [56]. The relevant equations are described below [55]:…”

Section: Design For Future High Tide and Wave Crest Scenarios On The ...mentioning

confidence: 92%

“…Figure 4 presents the procedures for establishing the targeted height of embankment in accordance with the Ibaraki Coastal Protection Master Plan. Numerical models utilizing two-dimensional shallow water equations are frequently employed for precise flood simulation [55]. The effectiveness of these models has been confirmed through various validations [56].…”

Section: Design For Future High Tide and Wave Crest Scenarios On The ...mentioning

confidence: 95%

“…Numerical models utilizing two-dimensional shallow water equations are frequently employed for precise flood simulation [55]. The effectiveness of these models has been confirmed through various validations [56].…”

Section: Design For Future High Tide and Wave Crest Scenarios On The ...mentioning

confidence: 95%

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Modeling Land Use Transformations and Flood Hazard on Ibaraki’s Coastal in 2030: A Scenario-Based Approach Amid Population Fluctuations

Safabakhshpachehkenari,

Tonooka

2024

Remote Sensing

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Coastal areas, influenced by human activity and natural factors, face major environmental shifts, including climate-induced flood risks. This highlights the importance of forecasting coastal land use for effective flood defense and ecological conservation. Japan’s distinct demographic path necessitates flexible strategies for managing its urban development. The study examines the Ibaraki Coastal region to analyze the impacts of land-use changes in 2030, predicting and evaluating future floods from intensified high tides and waves in scenario-based forecasts. The future roughness map is derived from projected land-use changes, and we utilize this information in DioVISTA 3.5.0 software to simulate flood scenarios. Finally, we analyzed the overlap between simulated floods and each land-use category. The results indicate since 2020, built-up areas have increased by 52.37 sq. km (39%). In scenarios of constant or shrinking urban areas, grassland increased by 28.54 sq. km (42%), and urban land cover decreased by 7.47 sq. km (5.6%) over ten years. Our research examines two separate peaks in water levels associated with urban flooding. Using 2030 land use maps and a peak height of 4 m, which is the lower limit of the maximum run-up height due to storm surge expected in the study area, 4.71 sq. km of residential areas flooded in the urban growth scenario, compared to 4.01 sq. km in the stagnant scenario and 3.96 sq. km in the shrinkage scenario. With the upper limit of 7.2 m, which is the extreme case in most of the study area, these areas increased to 49.91 sq. km, 42.52 sq. km, and 42.31 sq. km, respectively. The simulation highlights future flood-prone urban areas for each scenario, guiding targeted flood prevention efforts.

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“…The effectiveness of these models has been confirmed through various validations [56]. The relevant equations are described below [55]:…”

Section: Design For Future High Tide and Wave Crest Scenarios On The ...mentioning

confidence: 92%

Section: Design For Future High Tide and Wave Crest Scenarios On The ...mentioning

confidence: 95%

See 1 more Smart Citation

Modeling Land Use Transformations and Flood Hazard on Ibaraki’s Coastal in 2030: A Scenario-Based Approach Amid Population Fluctuations

Safabakhshpachehkenari,

Tonooka

2024

Remote Sensing

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“…This study used DioVISTA Flood Professional Version 3.5.0 software provided by Hitachi Power Solutions [22]. It allows coupled calculations of distributed runoff, onedimensional unsteady flow, and two-dimensional unsteady flow.…”

Section: Numerical Experimentsmentioning

confidence: 99%

Proposed Flood Mitigation Using Backwater in Highly Developed Watersheds with Consideration of Crop Calendars and Spatial Resolution: Toward Consensus Formation

Ueno,

Tebakari,

Noda

et al. 2023

Water

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In this study, we examine the possibility of proactive floodwater diversion to fields via backwater in numerical experiments using multiple elevation data products with different spatial resolutions and explore the optimal timing of water diversion from the perspective of crop calendars. This study targeted the Ida River System Land Improvement District, which has beneficiary lands on both banks of the Ida River, one of the tributaries of the Jinzu River that flows through Toyama and Gifu Prefectures in the Hokuriku and Chubu Regions of Japan. First, a comparison of the elevation data products revealed that photogrammetric data can capture microtopography, such as the footpaths between rice paddies and drainage channels around a field. Numerical experiments using two elevation data products, 5m DEM and LP-derived approximately 5m DEM, showed that flood peaks were reduced downstream in both cases using 5m DEM and LP approximately 5m DEM by directing floodwaters. Interviews with land improvement districts and a review of previous studies revealed that the ear-burst period is particularly vulnerable to flooding. Although the effect of flood peak reduction is reduced due to flooding of the field, it is possible that floodwater can be channeled during the ripening period in August and in late September and October when the ears have been harvested.

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Proposed Flood Mitigation using Backwater in Highly Developed Watersheds with Consideration of Crop Calendars and Spatial Resolution: Toward Consensus Formation

Ueno,

Tebakari,

Noda

et al. 2023

Preprint

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In this study, we examine the possibility of proactive floodwater diversion to fields via backwater in numerical experiments using multiple elevation data products with different spatial resolutions and explore the optimal timing of water diversion from the perspective of crop calendars. First, a comparison of the elevation data products revealed that photogrammetric data can capture microtopography, such as the footpaths between rice paddies and drainage channels around a field. Numerical experiments using two elevation data products, 5mDEM and LP-derived approximately 5mDEM, revealed that floodwater diversion can reduce the peak to about 19.2 m3/s when using the 5mDEM and can reduce the peak to 16.0 m3/s when using the LP-derived approximately 5mDEM. Interviews with land improvement districts and a review of previous studies revealed that the ear-burst period is particularly vulnerable to flooding. Although the effect of flood peak reduction is reduced due to flooding of the field, it is possible that floodwater can be channeled during the ripening period in August and in late September and October when the ears have been harvested.

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Development of a Flood Simulator for a Flood Risk Communication Tool

Cited by 3 publications

References 0 publications

Modeling Land Use Transformations and Flood Hazard on Ibaraki’s Coastal in 2030: A Scenario-Based Approach Amid Population Fluctuations

Modeling Land Use Transformations and Flood Hazard on Ibaraki’s Coastal in 2030: A Scenario-Based Approach Amid Population Fluctuations

Proposed Flood Mitigation Using Backwater in Highly Developed Watersheds with Consideration of Crop Calendars and Spatial Resolution: Toward Consensus Formation

Proposed Flood Mitigation using Backwater in Highly Developed Watersheds with Consideration of Crop Calendars and Spatial Resolution: Toward Consensus Formation

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