Countermeasures for Sediment-related Disasters in Japan using Hazard Maps

Uchida, Tatsuo; Nishimoto, Haruo; Osanai, Nobutomo; Shimizu, Toshihisa

doi:10.13101/ijece.2.46

Cited by 24 publications

(17 citation statements)

References 1 publication

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“…Some mapping techniques have been learned and discussed, aiming not only to produce better maps, but also to disseminate correctly the information contained in these documents, directed to risk professionals and the population at risk. Uchida et al . [2009] reviewed Table 2 Expected activities, results and products from GIDES Project for the Monitoring and Early Warning axis.…”

Section: Analysis Of Gides Activities Focusing On Monitoring and Earmentioning

confidence: 99%

Contributions of GIDES Project for Sediment Disaster Early Warnings in Brazil

Gregório

Graminha²,

Leal

et al. 2019

IJECE

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The rapid growth of urban areas and their inadequate expansion on slopes and flood plains made sediment disasters more frequent in Brazil. After the succession of disasters that caused major damage between 2008 and 2011, the Brazilian government reformulated its strategy and policies related to disaster risk management. Within this strategy, the Brazilian government has proposed a cooperation agreement with the Government of Japan, resulting in GIDES Project, which has as its main objective the strengthening of the national strategy for natural disaster risk management. Regarding actions related to the monitoring and early warning of sediment disasters, three Brazilian Municipalities were chosen as Pilot Implementations for GIDES, aiming to allow the discussion of new methodologies, adapting content and language of the alerts, the establishment of shared and unified information flows and records, and the establishment of common protocols, in experimental scale. This article aims to draw the major aspects in Brazilian risk management context, outline the main challenges faced so far and the Project's contribution perspectives for the improvement of sediment disaster risk management in Brazil, especially on issues related to monitoring and early warning.

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Section: Analysis Of Gides Activities Focusing On Monitoring and Earmentioning

confidence: 99%

Contributions of GIDES Project for Sediment Disaster Early Warnings in Brazil

Gregório

Graminha²,

Leal

et al. 2019

IJECE

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“…In Japan, sediment-related hazard assessment is mandatory for debris-flow prone streams with slope greater than 3.5% below the apex of the alluvial fan. Two hazard classes are identified by the colours yellow and red and associated with different constraints (Uchida et al 2009). The method is based on assessment of the flow specific force, defined by the dynamic term of the momentum equation in steady state conditions, Fd [N/m 2 ] (equation 1).…”

Section: Japanmentioning

confidence: 99%

Methodologies for hydraulic hazard mapping in alluvial fan areas

et al. 2014

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Abstract. Hydraulic hazards in alluvial fan areas are mainly related to torrential floods and debris flows. These processes are characterized by their fast time evolution and relevant sediment load. Rational approaches for the estimation of hazard levels in flood-prone areas make use of the maps of depth and velocity, which are provided by numerical simulations of the event. This paper focuses on national regulations regarding quantitative debris-flow hazard mapping and compares them to a simple conceptual model for the quantification of the hazard levels on the basis of human stability in a flood. In particular, the proposed method takes into account, in a conceptual fashion, both the local slope and the density of the fluid, that are crucial aspects affecting stability for processes in mountain environments. Physically-based hazard criteria provide more comprehensible and objective maps, increasing awareness among stakeholders and providing more acceptable constraints for land planning.

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“…As a consequence, debris fl ows, landslides and slope failures occur throughout the country every year (Infrastructure Development Institute-Japan and Japan River Association 2006 ). Approximately 1,000 sediment disasters occur in Japan every year due to the existing natural conditions (Uchida et al 2009 ) and account for about a half of the dead and missing by natural disasters (excluding those by the Southern Hyogo Earthquake, January 1995) (Japan Sabo Association 2001 ). The occurrences of sediment disasters in 1986-2000 are described in Table 3.1 .…”

Section: Chaptermentioning

confidence: 99%

“…At the same time, the Guidelines and Exposition for Sediment Disaster Hazard Mapping was prepared by the Erosion and Sediment Control Division of the Ministry of Land, Infrastructure, Transport and Tourism. The guidelines indicate that maps must include information stipulated by the Act on Sediment Disaster Countermeasures such as (1) the means for transmitting information on sediment disasters, (2) evacuation locations in the event of debris fl ow and steep slope failure, and (3) other information required to ensure smooth precautionary evacuation (Uchida et al 2009 ). These hazard maps must be produced by all heads of municipalities who must also ensure the smooth precautionary evacuation of residents through the dissemination of information using appropriate means.…”

Section: Hiroshima Sediment Disaster and Aftermath: Implication Of Comentioning

confidence: 99%

Typhoon, Flood and Landslide Related Disasters in Japan: Role of Communities

Shaw

2013

Disaster Risk Reduction

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Japan, due to its critical location is prone to typhoon, and related disasters like fl oods and landslides. There has been a strong history of risk reduction in Japan with community approaches. This chapter demonstrates the evolution of community roles in typhoon, fl ood and landslide related disasters over time with four specifi c examples: 1999 Hiroshima sediment disasters, 2004 typhoon disasters in Saijo City and Toyooka city, 2009 and 2011 rainfall disasters in Shiso city. These examples elaborate different issues like: evolution of community hazard maps and community participation in the drills (in Hiroshima), implementing town watching in the schools to enhance school community linkages (in Saijo), enhancing the roles of volunteers in post disaster debris management (in Toyooka), day time and night time disaster drills and community hazard map making (in Shiso). Collectively, it is shown that community plays in important role in different aspects of risk reduction activities before, during and after disasters. Keywords Community hazard maps • Disaster drills • Sediment disaster • Town watching • Volunteer management IntroductionMountains and hilly areas comprise about 70 % of the land area of Japan. Topographical and geological factors, such as steep mountains, fast-fl owing rivers, and unstable and soft ground, combined with weather conditions like typhoons and localized torrential rain climate and frequent earthquakes contribute to making

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Countermeasures for Sediment-related Disasters in Japan using Hazard Maps

Cited by 24 publications

References 1 publication

Contributions of GIDES Project for Sediment Disaster Early Warnings in Brazil

Contributions of GIDES Project for Sediment Disaster Early Warnings in Brazil

Methodologies for hydraulic hazard mapping in alluvial fan areas

Typhoon, Flood and Landslide Related Disasters in Japan: Role of Communities

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