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Damage caused by weather events has increased dramatically across the world in recent years. In the case of Japan, record-breaking rainfall has caused devastating damage almost every year since 2014; many people have been killed in these disasters. To better prepare for future heavy rainfalls, we need to discover how to prepare for disasters and mitigate damage by learning from examples in resilient communities. In 2017, torrential rains hit Toho Village in northern Kyushu, and the people as a whole responded well to avoid disastrous outcomes. We studied the actions and motivations of residents of Toho during this rainfall event by conducting semi-structured interviews in November 2017. The interviewees indicated that their motivation for evacuating was “personal observation of the danger” or “communication with neighbors”. Communication within the community was found to be an important factor that enabled the safe evacuation of community members, even without notice of the disaster risk and/or in the absence of timely information from the government because of a power outage. Knowledge of local landforms would be also helpful to reinforce appropriate actions and precautions needed during a disaster.
Atsuko Nonomura; Kazuhito Fujisawa; Mari Takahashi; Hideo Matsumoto; Shuichi Hasegawa. Analysis of the Actions and Motivations of a Community during the 2017 Torrential Rains in Northern Kyushu, Japan. International Journal of Environmental Research and Public Health 2020, 17, 2424 .
AMA StyleAtsuko Nonomura, Kazuhito Fujisawa, Mari Takahashi, Hideo Matsumoto, Shuichi Hasegawa. Analysis of the Actions and Motivations of a Community during the 2017 Torrential Rains in Northern Kyushu, Japan. International Journal of Environmental Research and Public Health. 2020; 17 (7):2424.
Chicago/Turabian StyleAtsuko Nonomura; Kazuhito Fujisawa; Mari Takahashi; Hideo Matsumoto; Shuichi Hasegawa. 2020. "Analysis of the Actions and Motivations of a Community during the 2017 Torrential Rains in Northern Kyushu, Japan." International Journal of Environmental Research and Public Health 17, no. 7: 2424.
Landslides cause serious damage to society, and some occur as reactivations of old landslides in response to earthquakes and/or rainfall. Landslide distributions are therefore useful when siting engineering projects such as road and tunnel constructions. Although several methods have been proposed to extract landslides from topographic data on the basis of their morphological features (crown, main scarp, and main body), such morphological features are gradually eroded by heavy precipitation or landslide recurrence. Therefore, conventional methods cannot always identify areas influenced by recurrent landslides. In this study, we investigated the relationship between ridgeline continuity and landslide distribution using AW3D30, which is a global digital surface model (DSM) dataset produced from the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) onboard the Advanced Land Observing Satellite (ALOS) launched by the Japan Aerospace Exploration Agency (JAXA) in 2013. The relationship between the area of landslides and the number of ridge pixels was analyzed, and we propose a method for estimating the upper bound distribution of landslide topographies based on extracted ridgelines data using the Data Envelopment Analysis (DEA) function on the R statistical software packages. The upper bound on the area of landslides decreases as the number of ridge pixels increases. The same trend was seen in all the five sites, and the upper bound derived from one site is hardly exceeded by those derived from all other sites. By using the upper bound distribution function, the landslide distribution will not be missed.
Atsuko Nonomura; Shuichi Hasegawa; Daisuke Kanbara; Takeo Tadono; Tatsuro Chiba. Topographic Analysis of Landslide Distribution Using AW3D30 Data. Geosciences 2020, 10, 115 .
AMA StyleAtsuko Nonomura, Shuichi Hasegawa, Daisuke Kanbara, Takeo Tadono, Tatsuro Chiba. Topographic Analysis of Landslide Distribution Using AW3D30 Data. Geosciences. 2020; 10 (4):115.
Chicago/Turabian StyleAtsuko Nonomura; Shuichi Hasegawa; Daisuke Kanbara; Takeo Tadono; Tatsuro Chiba. 2020. "Topographic Analysis of Landslide Distribution Using AW3D30 Data." Geosciences 10, no. 4: 115.
In mountainous areas of Asia, huge earthquakes have triggered numerous landslides in recent decades. Estimating the susceptibility of slopes to landslide and the volume of potential landslide debris helps in planning for disaster risk management. We developed a new index to measure the susceptibility of slopes to earthquake-induced landslides by using helicopter-borne electromagnetic resistivity (HEM) survey data to quantify the looseness of bedrock and a digital elevation model to quantify the amplification of seismic waves by topography. In our study area around the Kanagi landslide (triggered by the 1707 Hoei earthquake), our new index showed that landslide susceptibility was low within the area of past landslides, but was higher in areas outside the scar of past landslides. Our results indicate that most of the loosened rock masses have been removed by past landslides, and the areas beyond the main landslide scar, where loosened bedrock remains, are now most susceptible to future earthquake-induced landslides. Our results indicate that this index may be effective in areas susceptible to landslides due to toppling failure and rock avalanches in loosened bedrock slopes.
Atsuko Nonomura; Shuichi Hasegawa. Susceptibility of slopes to earthquake-induced landslides: a new index derived from helicopter-borne electromagnetic resistivity and digital elevation data sets. Landslides 2017, 14, 2155 -2163.
AMA StyleAtsuko Nonomura, Shuichi Hasegawa. Susceptibility of slopes to earthquake-induced landslides: a new index derived from helicopter-borne electromagnetic resistivity and digital elevation data sets. Landslides. 2017; 14 (6):2155-2163.
Chicago/Turabian StyleAtsuko Nonomura; Shuichi Hasegawa. 2017. "Susceptibility of slopes to earthquake-induced landslides: a new index derived from helicopter-borne electromagnetic resistivity and digital elevation data sets." Landslides 14, no. 6: 2155-2163.
近年,地震・水害・土砂災害などの自然災害が多発している.2016年4月14日,16日に発生した熊本地震では最大震度7を記録するとともに,2016年10月21日に発生した鳥取県中部地震では,最大震度6弱を記録し甚大な被害を及ぼした.これら繰り返し起こる自然災害においては,これまでの被災経験を活かすことができず,基礎自治体の災害対応も十分機能しない場合も多い.このため,行政に依存しない住民自らの自助・共助による地域防災力の向上があらためて求められている.本稿では,地域防災力の担い手となる防災士の養成と活動実態を検証し,そこから見えた課題と課題解決の具体的な対応策及び,東日本大震災以降の大学生の防災への備えや,防災意識の醸成と実践対応能力育成の取り組み事例について述べる.
Hirohiko Iwahara; Wataru Shiraki; Shuichi Hasegawa; Hitoshi Inomo; Kyosuke Takahashi. ISSUES AND COUNTERMEASURES FOR DISASTER PREVENTION TRAINING, AND FOSTERING STUDENTS DISASTER PREVENTION AWARENESS AND EXAMPLES OF INITIATIVES FOR PRACTICAL SKILLS DEVELOPMENT. Journal of Japan Society of Civil Engineers, Ser. F6 (Safety Problem) 2017, 73, I_7 -I_15.
AMA StyleHirohiko Iwahara, Wataru Shiraki, Shuichi Hasegawa, Hitoshi Inomo, Kyosuke Takahashi. ISSUES AND COUNTERMEASURES FOR DISASTER PREVENTION TRAINING, AND FOSTERING STUDENTS DISASTER PREVENTION AWARENESS AND EXAMPLES OF INITIATIVES FOR PRACTICAL SKILLS DEVELOPMENT. Journal of Japan Society of Civil Engineers, Ser. F6 (Safety Problem). 2017; 73 (2):I_7-I_15.
Chicago/Turabian StyleHirohiko Iwahara; Wataru Shiraki; Shuichi Hasegawa; Hitoshi Inomo; Kyosuke Takahashi. 2017. "ISSUES AND COUNTERMEASURES FOR DISASTER PREVENTION TRAINING, AND FOSTERING STUDENTS DISASTER PREVENTION AWARENESS AND EXAMPLES OF INITIATIVES FOR PRACTICAL SKILLS DEVELOPMENT." Journal of Japan Society of Civil Engineers, Ser. F6 (Safety Problem) 73, no. 2: I_7-I_15.
Minoru Yamanaka; Shuichi Hasegawa; Kazunori Oshima; Kazuhiko Nishida. GROUND INVESTIGATIONS DURING RESTORATION OF TAKAMATSU CASTLE TOWER BASE AND ITS DEFORMATION ANALYSIS. Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) 2016, 72, 239 -251.
AMA StyleMinoru Yamanaka, Shuichi Hasegawa, Kazunori Oshima, Kazuhiko Nishida. GROUND INVESTIGATIONS DURING RESTORATION OF TAKAMATSU CASTLE TOWER BASE AND ITS DEFORMATION ANALYSIS. Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering). 2016; 72 (3):239-251.
Chicago/Turabian StyleMinoru Yamanaka; Shuichi Hasegawa; Kazunori Oshima; Kazuhiko Nishida. 2016. "GROUND INVESTIGATIONS DURING RESTORATION OF TAKAMATSU CASTLE TOWER BASE AND ITS DEFORMATION ANALYSIS." Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) 72, no. 3: 239-251.
Shikoku Island has been threatened by great earthquakes occurred along the Nankai Trough and the Median Tectonic Line. Estimated magnitude of the largest earthquake along the Nankai Trough is estimated 9.0. Estimated magnitude of the Median Tectonic Line Earthquakes in northeastern part of Shikoku is 8.0 or more. The great earthquakes might trigger deep-seated landsides and the huge amount of landslide debris might paralyze transportation and isolate villages in mountainous areas. In order to mitigate the damage, estimating the hazard and preparation is necessary. In this study, index of susceptibility for earthquake-induced deep-seated catastrophic landslides is proposed geologically and geomorphologically.
Shuichi Hasegawa; Atsuko Nonomura; Jun’Ichi Uchida; Katsushi Kawato; Ryota Kageura; Tatsuro Chiba; Satoshi Onoda. Hazard Mapping of Earthquake-Induced Deep-Seated Catastrophic Landslides Along the Median Tectonic Line in Shikoku by Using LiDAR DEM and Airborne Resistivity Data. Engineering Geology for Society and Territory - Volume 2 2015, 717 -720.
AMA StyleShuichi Hasegawa, Atsuko Nonomura, Jun’Ichi Uchida, Katsushi Kawato, Ryota Kageura, Tatsuro Chiba, Satoshi Onoda. Hazard Mapping of Earthquake-Induced Deep-Seated Catastrophic Landslides Along the Median Tectonic Line in Shikoku by Using LiDAR DEM and Airborne Resistivity Data. Engineering Geology for Society and Territory - Volume 2. 2015; ():717-720.
Chicago/Turabian StyleShuichi Hasegawa; Atsuko Nonomura; Jun’Ichi Uchida; Katsushi Kawato; Ryota Kageura; Tatsuro Chiba; Satoshi Onoda. 2015. "Hazard Mapping of Earthquake-Induced Deep-Seated Catastrophic Landslides Along the Median Tectonic Line in Shikoku by Using LiDAR DEM and Airborne Resistivity Data." Engineering Geology for Society and Territory - Volume 2 , no. : 717-720.
Sanukite is a special volcanic rock that had erupted about 13 Ma in northern Shikoku of southwest Japan. Petrologically it belongs to aphyric andsite. Sanukite is much harder and finer-grained than the ordinary volcanic rocks. Although its density is 2.60 g/cm3, its P-wave velocity is about 6 km/s. This high P-wave velocity is unique characteristics of sanukite. Dr. Hitoshi Maeda made the first stone xylophone (“sekkin” petrophone) in 1981. He has continued the analyses into the specific vibrational properties and wave forms of sanukite and he created many musical instruments of stone known by the name “Sanukitephone.” We believe that sanukite and Sanukitephones will be the future World Heritage. Sanukite is globally important rock and its resource is limited. As sanukite is the symbolic rock of Sanuki District (Kagawa Prefecture), we must hurry to establish preservation system as one of the member of the Global Geopark Network.
Shuichi Hasegawa; Seiko Tsuruta; Munekazu Maeda. Preservation of Sanukite, the Highly Sophisticated Music Instrument Made of Andesite. Engineering Geology for Society and Territory - Volume 8 2014, 99 -102.
AMA StyleShuichi Hasegawa, Seiko Tsuruta, Munekazu Maeda. Preservation of Sanukite, the Highly Sophisticated Music Instrument Made of Andesite. Engineering Geology for Society and Territory - Volume 8. 2014; ():99-102.
Chicago/Turabian StyleShuichi Hasegawa; Seiko Tsuruta; Munekazu Maeda. 2014. "Preservation of Sanukite, the Highly Sophisticated Music Instrument Made of Andesite." Engineering Geology for Society and Territory - Volume 8 , no. : 99-102.
Minoru Yamanaka; Naoya Toyota; Atsuko Nonomura; Shuichi Hasegawa. Estimation of Amount of Tsunami Disaster Wastes for Shikoku Districts by Tounankai-Nankai Earthquake. Journal of the Society of Materials Science, Japan 2014, 63, 131 -136.
AMA StyleMinoru Yamanaka, Naoya Toyota, Atsuko Nonomura, Shuichi Hasegawa. Estimation of Amount of Tsunami Disaster Wastes for Shikoku Districts by Tounankai-Nankai Earthquake. Journal of the Society of Materials Science, Japan. 2014; 63 (2):131-136.
Chicago/Turabian StyleMinoru Yamanaka; Naoya Toyota; Atsuko Nonomura; Shuichi Hasegawa. 2014. "Estimation of Amount of Tsunami Disaster Wastes for Shikoku Districts by Tounankai-Nankai Earthquake." Journal of the Society of Materials Science, Japan 63, no. 2: 131-136.
Yoshihiro Suenaga; Katsuhiko Koizumi; Minoru Yamanaka; Shuichi Hasegawa. RESEARCH ON THE WAVE ENERGY ABSORPTION FACILITY WITH OSCILLATING WATER COLOUMN. Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 2014, 70, I_277 -I_282.
AMA StyleYoshihiro Suenaga, Katsuhiko Koizumi, Minoru Yamanaka, Shuichi Hasegawa. RESEARCH ON THE WAVE ENERGY ABSORPTION FACILITY WITH OSCILLATING WATER COLOUMN. Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering). 2014; 70 (2):I_277-I_282.
Chicago/Turabian StyleYoshihiro Suenaga; Katsuhiko Koizumi; Minoru Yamanaka; Shuichi Hasegawa. 2014. "RESEARCH ON THE WAVE ENERGY ABSORPTION FACILITY WITH OSCILLATING WATER COLOUMN." Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 70, no. 2: I_277-I_282.
While dealing with slope stability issues, determining the state of stress and the relation between driving force and resisting force are the fundamental deterministic steps. Gravitational stresses affect geologic processes and engineering operations in slopes. Considering this fact, a concept of topo-stress evaluation is developed in this research and used to produce a shallow landslide susceptibility map in a model area. The topo-stress introduced in this research refers to the shear stress induced by the gravitational forces on the planes parallel to the ground surface. Weight of the material on a slope and friction angle of the jointed rock mass are the two fundamental parameters that are considered to govern topo-stress in this study. Considering topo-stress as a main factor for initiating shallow landslides, a GIS-based probabilistic model is developed for shallow landslide susceptibility zonation. An ideal terrain in central Nepal is selected as the study area for this purpose. Two event-based shallow landslide inventories are used to predict accuracy of the model, which is found to be more than 78 % for the first event-landslides and more than 76 % for the second event-landslides. It is evident from these prediction rates that the probabilistic topo-stress model proposed in this work is quite acceptable when regional scale shallow landslide susceptibility mapping is practiced, such as in the Himalayan rocky slopes.
Ranjan Kumar Dahal; Netra Prakash Bhandary; Shuichi Hasegawa; Ryuichi Yatabe. Topo-stress based probabilistic model for shallow landslide susceptibility zonation in the Nepal Himalaya. Environmental Earth Sciences 2013, 71, 3879 -3892.
AMA StyleRanjan Kumar Dahal, Netra Prakash Bhandary, Shuichi Hasegawa, Ryuichi Yatabe. Topo-stress based probabilistic model for shallow landslide susceptibility zonation in the Nepal Himalaya. Environmental Earth Sciences. 2013; 71 (9):3879-3892.
Chicago/Turabian StyleRanjan Kumar Dahal; Netra Prakash Bhandary; Shuichi Hasegawa; Ryuichi Yatabe. 2013. "Topo-stress based probabilistic model for shallow landslide susceptibility zonation in the Nepal Himalaya." Environmental Earth Sciences 71, no. 9: 3879-3892.
Landslides are the most frequent natural disaster in Nepal. As such, the scientific study of the Nepal landslides has been in progress for several years, but no significant achievement has been made in preventing landslides and mitigating disaster damage yet. As one important aspect of dealing with landslides is understanding their distribution pattern based on geological and geomorphological formations, this paper addresses these issues, and attempts to present a scenario of large-scale landslide distribution along the road corridors of major highways in central Nepal. As a result of landslide mapping using aerial photographs, topographical maps and field verification, the following points were understood: (1) the distribution of large-scale landslides is relatively dense over the area close to tectonic thrusts; (2) slate and phyllite zones have a greater ratio of landslide distribution; and (3) topographies with a mean slope angle of about 27–36 degrees have denser distribution of large-scale landslides.
Netra Prakash Bhandary; Ryuichi Yatabe; Ranjan Kumar Dahal; Shuichi Hasegawa; Hideki Inagaki. Areal distribution of large-scale landslides along highway corridors in central Nepal. Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards 2013, 7, 1 -20.
AMA StyleNetra Prakash Bhandary, Ryuichi Yatabe, Ranjan Kumar Dahal, Shuichi Hasegawa, Hideki Inagaki. Areal distribution of large-scale landslides along highway corridors in central Nepal. Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards. 2013; 7 (1):1-20.
Chicago/Turabian StyleNetra Prakash Bhandary; Ryuichi Yatabe; Ranjan Kumar Dahal; Shuichi Hasegawa; Hideki Inagaki. 2013. "Areal distribution of large-scale landslides along highway corridors in central Nepal." Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards 7, no. 1: 1-20.
Minoru Yamanaka; Hirohiko Iwahara; Shuichi Hasegawa; Masahide Ishizuka; Shoji Takahashi. Strength Property of Soil Improvement Auxiliary Material Utilizing Stone Sludge. Journal of the Society of Materials Science, Japan 2012, 61, 15 -18.
AMA StyleMinoru Yamanaka, Hirohiko Iwahara, Shuichi Hasegawa, Masahide Ishizuka, Shoji Takahashi. Strength Property of Soil Improvement Auxiliary Material Utilizing Stone Sludge. Journal of the Society of Materials Science, Japan. 2012; 61 (1):15-18.
Chicago/Turabian StyleMinoru Yamanaka; Hirohiko Iwahara; Shuichi Hasegawa; Masahide Ishizuka; Shoji Takahashi. 2012. "Strength Property of Soil Improvement Auxiliary Material Utilizing Stone Sludge." Journal of the Society of Materials Science, Japan 61, no. 1: 15-18.
Landslides, primarily occurring in deep-seated landslide areas, frequently damage important roads in Nepal and contribute to massive economic losses and public suffering every year. Efforts to understand these landslides, which are often only regarded as geological phenomena, through material shear behaviour however remain insignificantly reported. In order to narrow this research gap, this paper first addresses spatial distribution of these landslides in about 150-km arterial road corridors in central Nepal, and then discusses their occurrence mechanism in terms of a relation between material shear strength and mineralogical composition. The deep-seated landslide inventory prepared out of the aerial photos and topo-sheets revealed that the landslide distribution is dominant in phyllitic and slate zones of geology while the laboratory tests on clay materials, sampled from 15 locations in the study area, in ring shear machine and x-ray diffractometer exhibited that the landslide soils, especially from the phyllitic area, possess comparatively high angle of shear resistance in a range of 20–30 degrees with remarkable influence of mica and chlorite composition, whose increased relative amount was found to result in notable decrease of the angle of shear resistance.
N. P. Bhandary; R. Yatabe; S. Hasegawa; R. K. Dahal. Characteristic Features of Deep-Seated Landslides in Mid-Nepal Himalayas: Spatial Distribution and Mineralogical Evaluation. Geo-Frontiers 2011 2011, 1693 -1702.
AMA StyleN. P. Bhandary, R. Yatabe, S. Hasegawa, R. K. Dahal. Characteristic Features of Deep-Seated Landslides in Mid-Nepal Himalayas: Spatial Distribution and Mineralogical Evaluation. Geo-Frontiers 2011. 2011; ():1693-1702.
Chicago/Turabian StyleN. P. Bhandary; R. Yatabe; S. Hasegawa; R. K. Dahal. 2011. "Characteristic Features of Deep-Seated Landslides in Mid-Nepal Himalayas: Spatial Distribution and Mineralogical Evaluation." Geo-Frontiers 2011 , no. : 1693-1702.
Geologically and tectonically active Himalayan Range is characterized by highly elevated mountains and deep river valleys. Because of steep mountain slopes, and dynamic geological conditions, large-scale landslides are very common in Lesser and Higher Himalayan zones of Nepal Himalaya. Slopes along the major highways of central Nepal namely Prithvi Highway, Narayangadh-Mugling Road and Tribhuvan Highway are considered in this study of large-scale landslides. Geologically, the highways in consideration pass through crushed and jointed Kathmandu Nappe affected by numerous faults and folds. The relict large-scale landslides have been contributing to debris flows and slides along the highways. Most of the slope failures are mainly bechanced in geological formations consisting phyllite, schist and gneiss. Laboratory test on the soil samples collected from the failure zones and field investigation suggested significant hydrothermal alteration in the area. The substantial hydrothermal alteration in the Lesser Himalaya during advancement of the Main Central Thrust (MCT) and thereby clay mineralization in sliding zones of large-scale landslide are the main causes of large-scale landslides in the highways of central Nepal. This research also suggests that large-scale landslides are the major cause of slope failure during monsoon in the Lesser Himalaya of Nepal. Similarly, hydrothermal alteration is also significant in failure zone of the large-scale landslides. For the sustainable road maintenance in Nepal, it is of utmost importance to study the nature of sliding zones of large-scale landslides along the highways and their role to cause debris flows and slides during monsoon period.
Shuichi Hasegawa; Ranjan Kumar Dahal; Minoru Yamanaka; Netra Prakash Bhandary; Ryuichi Yatabe; Hideki Inagaki. Causes of large-scale landslides in the Lesser Himalaya of central Nepal. Environmental Earth Sciences 2008, 57, 1423 -1434.
AMA StyleShuichi Hasegawa, Ranjan Kumar Dahal, Minoru Yamanaka, Netra Prakash Bhandary, Ryuichi Yatabe, Hideki Inagaki. Causes of large-scale landslides in the Lesser Himalaya of central Nepal. Environmental Earth Sciences. 2008; 57 (6):1423-1434.
Chicago/Turabian StyleShuichi Hasegawa; Ranjan Kumar Dahal; Minoru Yamanaka; Netra Prakash Bhandary; Ryuichi Yatabe; Hideki Inagaki. 2008. "Causes of large-scale landslides in the Lesser Himalaya of central Nepal." Environmental Earth Sciences 57, no. 6: 1423-1434.
Takamatsu is a harbor city of 330,000 people on the northern shore of Shikoku Island, southwest Japan. Earthquakes in the Nankai Trough, typically of magnitude M 8+, have been considered the primary source of seismic hazard for the island and Takamatsu. A major active fault system, the Median Tectonic Line, runs across the Shikoku from east to west near the north shore. There is no documented historical seismicity associated with this major fault system in Shikoku or with associated faults such as the 20 km Nagao Fault near Takamatsu. Therefore the trenches were cut across some of the more important faults to expose the record of past seismicity. Additional data on past seismicity is derived from paleo-liquefaction studies in the Takamatsu plain. This paper describes the trenching and paleo-seismic studies and discusses the implications of the findings for seismic hazard in Takamatsu.
S Hasegawa; W.D.L Finn. Seismic hazard in Takamatsu Japan from fault trenching and paleo-liquefaction studies. Soil Dynamics and Earthquake Engineering 2002, 22, 901 -909.
AMA StyleS Hasegawa, W.D.L Finn. Seismic hazard in Takamatsu Japan from fault trenching and paleo-liquefaction studies. Soil Dynamics and Earthquake Engineering. 2002; 22 (9-12):901-909.
Chicago/Turabian StyleS Hasegawa; W.D.L Finn. 2002. "Seismic hazard in Takamatsu Japan from fault trenching and paleo-liquefaction studies." Soil Dynamics and Earthquake Engineering 22, no. 9-12: 901-909.
The characteristics of the landslides along the Median Tectonic Line occurred by the road construction are considered. Most of the landslides are the sliding of the colluvial deposit by the cutting. The scale of the landslides is relatively small, up to 200m in the width and length, up to 30m in the depth of the slip surface. The angle of shear resistance of the clay in the fractured zone at the Median Tectonic Line is relatively small. This is one reason that the counter measure of the landslides at the Median Tectonic Line is difficult.
Ryuichi Yatabe; Norio Yagi; Shuji Sato; Shuichi Hasegawa. Consideration on Landslides Along the Median Techtonic Line Occurred by Road Construction. Landslides 1997, 34, 42 -49_1.
AMA StyleRyuichi Yatabe, Norio Yagi, Shuji Sato, Shuichi Hasegawa. Consideration on Landslides Along the Median Techtonic Line Occurred by Road Construction. Landslides. 1997; 34 (2):42-49_1.
Chicago/Turabian StyleRyuichi Yatabe; Norio Yagi; Shuji Sato; Shuichi Hasegawa. 1997. "Consideration on Landslides Along the Median Techtonic Line Occurred by Road Construction." Landslides 34, no. 2: 42-49_1.