An Outline of Heavy Rainfall Disasters in Hidaka Region, Hokkaido, by Typhoon NO.10, 2003

Hasegawa, Kazuyoshi; ARAYAE, Tohru; Ogawa, Takehiro; Kikuchi, Satoshi; Kuroki, Mikio; Komatsu, Toshimitsu; Saga, Hiroshi; Sakai, Osamu; Suzuki, Hiroyuki; Suzuki, Yuichi; Tanaka, Gaku; Tanaka, Hitoshi; Tohma, Satoshi; Nakatsugawa, Makoto; Hatta, Shigemi; MURAKAMI, Yasuhiro; YAMASHITA, Toshiko; Yamada, Takashi; Watanabe, Yasuharu; Watanabe, Yasunori; Fujita, Mutsuhiro

doi:10.2208/prohe.49.427

Cited by 4 publications

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“…[12] Although the total amount of sediment influx into the trough is poorly understood, a previous study estimated the amount of sediment discharge during the major flood events [e.g., Murakami et al, 2008]. An extraordinary typhoon-related flood in August 2003 deposited up to 27 cm of sediment on the shelf around the river mouths, depositing 2.9 Â 10 6 ton (1.1 Â 10 6 m 3 ) off the Saru River (drainage area of 1350 km 2 ) and 1.9 Â 10 6 ton (0.72 Â 10 6 m 3 ) off the Mukawa River (1270 km 2 ) [Hasegawa et al, 2005]. Coastal erosion is another contributor to the sediment influx along the eastern margin of the trough.…”

Section: Geologymentioning

confidence: 99%

“…An extraordinary typhoon-related flood in August 2003 deposited up to 27 cm of sediment on the shelf around the river mouths, depositing 2.9 Â 10 6 ton (1.1 Â 10 6 m 3 ) off the Saru River (drainage area of 1350 km 2 ) and 1.9 Â 10 6 ton (0.72 Â 10 6 m 3 ) off the Mukawa River (1270 km 2 ) [Hasegawa et al, 2005]. Coastal erosion is another contributor to the sediment influx along the eastern margin of the trough.…”

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Mass transport‐dominated sedimentation in a foreland basin, the Hidaka Trough, northern Japan

Noda

TuZino

Joshima

et al. 2013

Geochem Geophys Geosyst

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[1] Mass transport is an important process of sediment redistribution from shallow to deep sea basins. It is vital to understand this process for disaster prevention and protection of economic interests in coastal and offshore areas. We describe mass transport-dominated sedimentation in an active foreland basin, the Hidaka Trough, which developed from collision between the northeastern Japan arc and the Kuril arc. The basin is deformed by east-west compression associated with large, frequent earthquakes. The trough is filled with thick (>4.5 km) sediments, ranging from coal-bearing Cretaceous terrestrial strata to modern diatomaceous hemipelagic mud and volcanic ash. Bottomsimulating reflectors and the distribution of mud volcanoes, pockmarks, and acoustic wipe-out zones on the seismic records suggest the presence of subsurface gases in the sediments. The basin features stacked mass transport deposits (MTDs), but no channel-levee systems have developed. The MTDs are relatively thin (<30 m) and are derived from three sides of the basin margin. Initiation of submarine slope failure in this area may be controlled by multiple factors that increase driving forces and decrease resistance of the slopes. The driving forces include oversteepening of the margin slope as a result of thrusting and folding, and additional downslope gravitational acceleration caused by cyclic shaking during earthquakes. Decreased resistance in the slopes may be caused by the accumulation of excess pore-water pressure driven by a high-sedimentation rate, gas hydrate dissociation accompanying changes in sea level or seawater temperature, and liquefaction in coarsegrained beds during earthquakes.

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Section: Geologymentioning

confidence: 99%

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confidence: 99%

Mass transport‐dominated sedimentation in a foreland basin, the Hidaka Trough, northern Japan

Noda

TuZino

Joshima

et al. 2013

Geochem Geophys Geosyst

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Impacts of Recent Climate Change on Flood Disaster and Preventive Measures

Oshikawa¹,

Hashimoto²,

Tsukahara³

et al. 2008

J. Disaster Res.

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This paper examines flood disasters caused by climate change focusing on two floods occurring on Japan's southwest island of Kyushu during record precipitation exceeding 1,000 mm. Our examination results emphasize the urgent necessity of implementing dam measures to prevent serious dam accidents at all costs and adequate action against driftwood and other waste materials to prevent them from interfering in dam operation. Changes in natural weather and other patterns, e.g., heavy rainfalls 1,900 mm recorded in the Miyazaki Prefecture during Typhoon 14 in 2005 and 1,200 mm in the Kagoshima Prefecture Sendai River basin in five days of torrential rain in 2006, have made it clear that conventional measures for coping with such occurrences are no longer adequate. Just 300 mm of precipitation during Typhoon 10 in 2003, for example, triggered catastrophic results in Hokkaido, where heavy rainfall rarely occurs and there is non immunity against 300 mm rainfall. Since global warming and its attendant influences are expected to continue and to bring condition of non immunity against an increased potential of disaster to whole country, the need for better knowledge and ideas on disaster prevention are urgently required.

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“Disaster Immunity” - A New Concept for Disaster Reduction in Adaptation to Disaster Hazard Intensification

Oshikawa¹,

Asai²,

Tsukahara³

et al. 2009

J. Disaster Res.

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We introduce a new “disaster immunity” concept in place of conventional “disaster management capacity” that reflects dynamic transitions in society and nature more accurately than the fixed conventional “disaster management capacity” concept. Because awareness deeply impacts on disaster management, the new concept captures disaster dynamics and could play an important role in disaster reduction. Since global warming involves disaster hazard intensification, it is not enough to simply strengthen existing measures. As an example, Japan responds to particular temperate zone patterns through long-term disaster management infrastructures. Society and nature in Japan have disaster management capacity matching typical temperate zone hazards. A rapid transition to subtropical climate patterns within the next several decades to a century is expected to generate large gaps between disaster hazards and disaster management capacity of human society and nature, leading to an imbalance. Under unstable conditions, society and nature have become increasingly vulnerable due to decreased “immunity.” Increasing “disaster immunity” is thus an urgent and important issue.

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An Outline of Heavy Rainfall Disasters in Hidaka Region, Hokkaido, by Typhoon NO.10, 2003

Cited by 4 publications

References 0 publications

Mass transport‐dominated sedimentation in a foreland basin, the Hidaka Trough, northern Japan

Mass transport‐dominated sedimentation in a foreland basin, the Hidaka Trough, northern Japan

Impacts of Recent Climate Change on Flood Disaster and Preventive Measures

“Disaster Immunity” - A New Concept for Disaster Reduction in Adaptation to Disaster Hazard Intensification

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