著者

脇水 健次 西山 浩司

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.20, no.4, pp.397-401, 2002-02-28

著者

梶川 正弘

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.7, no.1, pp.37-48, 1988-03-01

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The severe disaster caused by gusts and hailfalls occurred in the southern inland of Akita Prefecture on August 6,1985. This report deals with the outline of meteorological conditions, damages and characteristics of the gusts in relation to the hailstorms. The following main results were obtained : l) The gusts accompanied with hailfalls were brought about by well-developed thunderstorms related mainly to the unstable stratification by advection of upper cold air. 2) The damaged area by the gusts is about 5 km in north-south direction and about 4 km in east-west direction. The degree of damages is remarkable in western and southwestern side of the hailfall area. Furthermore, the gusts show a divergent tendency in the direction of mainly west, southwest and south from the damaged area by hailfalls. Therefore, it seems that the damages by gusts was caused by the downburst accompanied by well-developed cumulonimbus. 3) Most of the damages were the injury of heads of rice plants and trellises and blossoms of hops by hailfalls and gusts.

著者

中島 暢太郎

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.5, no.2, pp.61-63, 1986-09-30

著者

三隅 良平

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.17, no.2, pp.177-188, 1998-08-31

被引用文献数

1

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A forecast experiment of landslide is conducted with the use of a mesoscale rainfall model. The rainfall model is physically based, which predicts rainfall at 2 km grid intervals. The predicted rainfall is inputted into an empirical formula and the occurrence of landslide is evaluated. We applied the model to the landslide disaster caused by Typhoon 9307. The model predicted 48% and 82% of the study area as the occurrence regions of severe and non-severe landslides, respectively. Actually two severe and nine non-severe landslides occurred in these regions. The results suggest the possibility of landslide forecasting with the use of a rainfall model. However, some problems were pointed out through the experiments; for example, the predicted landslide regions were too wide compared with the actual ones. We discuss how the problems will be improved.

著者

牛山 素行 里深 好文 海堀 正博

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.18, no.2, pp.165-175, 1999-08-31

被引用文献数

2

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The heavy rainfall disasters occurred mainly in Hiroshima Prefecture on June 29th, 1999. The death toll in the whole country was 41. This damage is the biggest after the typhoon disasters in September 1993. The maximum daily precipitation around Hiroshima City was about 260 mm and the maximum hourly precipitation was about 70 mm. These records became one of the highest records around Hiroshima City. The heavy rainfall area was local; the area with more than 200 mm daily precipitation was about 10 km (east - west), 30 km (north - south). Most of the dead persons were killed by the sediment disasters. There are 5,960 hazardous place for steep slope failure and 4,930 dangerous streams of debris flows in Hiroshima Prefecture, which are the highest in Japan. Based on this event, it is necessary to construct warning and evacuation system, to examine a way of land use and so on in the future.

著者

近藤 観慈 林 拙郎 王 文能 沼本 晋也 川邊 洋

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.22, no.3, pp.255-270, 2003-11-30

被引用文献数

3

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The Chi-chi earthquake, which occurred on September 21, 1999, generated serious damage mainly in the central Taiwan. The number of deaths and missings caused by the earthquake became the scale which ranks second to the Hsinchu-Taichung earthquake which occurred in 1935. Not only in the urban area but also in the mountainous area, the earthquake caused terrible damage due to the upheaval of the ground, cave-ins and landslides. About two years after the Chi-chi earthquake, two typhoons (Toraji, Nari) crossed over central Taiwan in June and September, respectivelys in 2001. These generated serious damage as well in the same area which had suffered damages from the Chi-chi earthquake. This paper shows the sediment disasters in the mountainous area caused by this earthquake and by these typhoons. The situations of sediment disasters, along with the history of natural disasters in Taiwan, are summarized.

著者

岩松 暉

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.16, no.2, pp.107-111, 1997-08-30

被引用文献数

3

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Severe debris flow disaster occurred along the Harihara River, Izumi City, Kagoshima Prefecture at midnight of June 10,1997. 21 persons were killed and 18 houses were destroyed by the debris flow. Pleistocene volcanic breccias are widely distributed in the vicinity of the Harihara district. Matrices of these rocks have been greatly altered to very soft clay by superficial weathering. And thick slope sediments which consist of talus deposits with huge boulders and core stones of onion structure crop out in the landslide area. Collapsed slope sediments rushed into farm pond beneath the slope, and water-saturated debris changed into debris flow.

著者

牛山 素行

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.22, no.4, pp.373-385, 2004-02-29

被引用文献数

1

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A heavy rainfall caused by a baiu-front (stationary front) occurred in Kyusyu district from July 19 to 21, 2002. In Minamata city, Kumamoto prefecture, an hourly precipitation of 91 mm was recorded on July 20 and the total precipitation amounted to 428 mm. The highest 1 hour precipitation records in the last 23 years were revised at 3 observatories, and the highest 24-hour precipitation was revised at 4 observatories based on the data of the Japan Meteorological Agency. In this heavy rainfall, 23 persons were killed, 104 houses were destroyed, and about 7,800 houses were inundated. The largest human damage due to this event occurred in Minamata city, Kumamoto prefecture. While the residents were taking shelter, debris flow killed 19 people in the city. The evacuation issue by Minamata city was announced after the debris flow occurred. In Fukuoka city, 1352 houses were flooded when the Mikasa River overflowed its banks. A flood disaster had also occurred in the city in 1999. In a hotel, a disaster prevention plan based on Internet real-time rainfall and water revel information was established after the disaster. Water sealing plates were installed according to this plan and this hotel escaped the present flood damage. It is important to examine methods of utilizing real time rainfall information.

著者

高橋 和雄 阿比留 勝吾

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.14, no.2, pp.125-134, 1995-10-01

被引用文献数

1

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The heavy rainfall which swept over the Kagoshima district on August 6,1993 killed 49 persons and damaged Kagoshima city and its vicinity tremendously. Roads of Kagoshima city were suddenly submerged by flash flood and broken by solpe failure and landslide. The disaster prevention agencies could not enough accumulate and disseminate disaster information. It is the object of this paper to investigate the countermeasure of the disaster prevention agencies such as meteorological office, fire fighting office, city office, electric power company, Nippon telegraph and telephone company, police station and information media. The dissemination of the information and evacuation plan are also discussed.

著者

沖村 孝 杉本 剛康

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.13, no.3, pp.297-313, 1995-01-31

被引用文献数

1

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A method for estimating the probab1e damage caused by heavy rainfall is proposed that considers the occurrence rate of disasters caused by natural phenomena and the distribution of things that must be protected. Flood and mountain slope failures are regarded as natural phenomena in our study, and the population density is seen as a thing to be protected. This method was applied to the base of the mountain area along the Sumiyoshi River in Kobe City which had experienced flooding and mountain slope failures in 1938 and 1967. The results obtained for the occurrence rates of natura1 phenomena reflect the effects of the counter-measures taken after 1938,as well as urban development that has spread along the base of the Rokko Mountains.

著者

狐崎 長琅 後藤 典俊 小林 芳正 井川 猛 堀家 正則 斉藤 徳美 黒田 徹 山根 一修 奥住 宏一

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.9, no.3, pp.1-17, 1990-12-31

被引用文献数

45 75

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The following two kinds of empirical relations are derived : 1) relations between the P-wave velocities and geological factors (facies, time, and depth), based on oil well data in Akita prefecture; 2) relations between the S-wave velocities and the P-wave ones, based on published and new data from in situ velocities measurements in relatively deep boreholes in Japan. Combination of the above two relations provides means for estimating the S-wave velocities from geological factors. A VSP experiment was carried out in a well of 1.3 km depth in Akita prefecture to provide this study with S- and P-wave data of oil field area. To demonstrate the purpose of this study, calculations of ground vibrations due to the vertically incident SH-waves are conducted for a two-dimentional seismic structure model corresponding to a typical sedimentary basin in Akita prefecture.

著者

上西 幸司

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.28, no.2, pp.167-183, 2009-08-31

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An earthquake of moment magnitude 6.3 has struck the L'Aquila region in Italy on April 6, 2009, at 3:32am (local time), and claimed nearly 300 lives. Another 1,500 were injured and 66,000 became homeless. The Research Center for Urban Safety and Security of Kobe University has sent the author to investigate the earthquake-induced damage in the stricken area from April 16 to 19, 2009. This article briefly reports the damage of buildings and the ground by showing the photographs taken in the L'Aquila region together with the pre-earthquake images provided by the Google Street View. The response of the affected people, living in a developed country, to the disaster is also mentioned.

著者

葛葉 泰久 沼本 晋也 カザディ サンガ ンゴイ 福山 薫

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.24, no.4, pp.409-421, 2006-02-28

被引用文献数

3

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Mie Prefecture suffered from water-related disasters due to the Typhoon T200421 on September 29, 2004. Nine persons died, about 70 houses were destroyed by debris flows, slope failures or landslides, and more than 5,000 households were inundated. In this work, first, we analyze meteorological data and conclude that the heavy rainfall were caused by the existence of a stationary front into which the typhoon supplied warm humid air masses, and the orographic conditions over Mie. Secondly, we estimate the return period of t-hour (t=1, 2, 3, 6, 12, 24 hours) precipitation at four locations in the prefecture. Finally, disasters due to landslides or debris flows in Miyagawa Village are overviewed and discussed. The above-mentioned meteorological analysis shows a very close relationship between the locations of heavy precipitations during relatively long terms (say 24 hours) and the occurrence of debris flows or landslides.

著者

今本 博健 西沢 利栄 鈴木 幸一

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.7, no.2, pp.79-82, 1988-06-30

著者

飛田 哲男 井合 進 汪 明武 仲山 賢司 Tetsuo TOBITA Susumu IAI Ming-gu WANG Kenji NAKAYAMA 京都大学防災研究所 京都大学防災研究所 京都大学防災研究所 京都大学大学院 Disaster Prevention Research Institute Kyoto University Disaster Prevention Research Institute Kyoto University Disaster Prevention Research Institute Kyoto University Department of Civil and Earth Resources Engineering Kyoto University

出版者

日本自然災害学会

雑誌

自然災害科学 = Journal of Japan Society for Natural Disaster Science (ISSN:02866021)

巻号頁・発行日

vol.23, no.4, pp.595-602, 2005-02-28

参考文献数

15

被引用文献数

2

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A major earthquake (M 6.8, 37.289 N, 138.870E, Depth 13km) occurred on October 23, 2004, at 5 : 56PM (local time) near Ojiya City, Niigata Prefecture, Japan. The JMA seismic intensity of 7 was recorded in Kawaguchi-machi for the first time after seismic intensity meters were installed. Aftershocks with the JMA seismic intensity scale of more than 5 minus had been measured for more than two weeks in the affected area. Forty people were killed, more than 4,500 were injured and more than 100,000 were evacuated for days. The number of totally collapsed houses exceeded 2,800. Strong shaking triggered more than 1,600 landslides, and some of them blocked up river channels in mountain area. The earthquake also caused major damage on civil structures. The Joetsu Shinkansen bullet train was derailed for the first time in its history of 40 years. The number of passengers was 151 and miraculously no one was injured.