scholarly journals Distribution of shallow landslides and related mass movement processes induced by the heavy rain in July 2018 on Gogoshima Island, Ehime Prefecture, Japan

2019 ◽  
Vol 56 (3) ◽  
pp. 129-134
Author(s):  
Go SATO ◽  
Takashi KIMURA ◽  
Kiyoharu HIROTA ◽  
TSOU Ching-Ying ◽  
Hiroshi YAGI
Keyword(s):  
Mass Movement ◽  
Heavy Rain ◽  
Shallow Landslides

scholarly journals Heavy Rain Types for Triggering Shallow Landslides in South Korea

2015 ◽  
Vol 60 (1) ◽  
pp. 243-249 ◽  
Author(s):  
Suk-Woo Kim ◽  
Kun-Woo Chun ◽  
Kyoichi Otsuki ◽  
Yoshinori Shinohara ◽  
Man–Il Kim ◽  
...  
Keyword(s):  
South Korea ◽  
Heavy Rain ◽  
Shallow Landslides

scholarly journals Considerações sobre o LiDAR na análise de instabilidade de vertentes

Terr Plural ◽  
2020 ◽  
Vol 14 ◽  
pp. 1-15
Author(s):  
Tiago D. Martins ◽  
Chisato Oka-Fiori ◽  
Bianca Carvalho Vieira ◽  
Carlos Bateira
Keyword(s):  
Mass Movement ◽  
Digital Terrain Model ◽  
Shallow Landslides ◽  
Slope Instability ◽  
Light Detection And Ranging ◽  
Data Set ◽  
Terrain Model ◽  
Digital Terrain ◽  
Natural Neighbor ◽  
Geomorphological Analysis

The digital models of landform representation allow several types of geomorphological analysis, such as assessing prone areas to the mass movement. Among the data set that applied to elaborate such models, LiDAR (Light Detection and Ranging) technology has stood out due to its capacity to represent in detail terrain specific characteristics. This work aimed to present a variety of studies based on LiDAR to evaluate slope instability and to describe an interpolation test of LiDAR raw data to generate a Digital Terrain Model considering different interpolation approaches, in an area affected by shallow landslides. The results show that the tool applied is efficient when combined Triangulation to Natural Neighbor methods.

Ecology of juvenile and adolescent banana prawns, Penaeus merguiensis, in a mangrove estuary and adjacent off-shore area of the Gulf of Carpentaria. II. Emigration, population Structure and Growth of Juveniles

1980 ◽  
Vol 31 (5) ◽  
pp. 653 ◽  
Author(s):  
DJ Staples
Keyword(s):  
Population Structure ◽  
Carapace Length ◽  
Mass Movement ◽  
Heavy Rain ◽  
Maximum Growth ◽  
Wet Season ◽  
Summer Period ◽  
Eastern Area ◽  
History Of ◽  
Short Time

Emigration of juvenile P. merguiensis from the Norman River was largely confined to the wet season; three main waves of emigration were observed, each corresponding to a period of heavy rain in December, January, and February. Following each period of rain, the prawns migrated in the surface waters of the estuary and became spread laterally across the river's width. The size of emigrating prawns decreased over the wet season, reflecting changes in both the size of prawns in the resident population and the strength of the stimulus to emigrate. During periods of low rainfall only a small number of larger prawns tended to migrate, whereas during high rainfall periods a mass movement of prawns of all sizes occurred. Examination of weekly changes in population structure showed that three main cohorts ofjuvenile prawns entered and left the river during the spring-summer period (November-February). The resident time of these prawns ranged from 1 to 9 weeks, depending on the timing of heavy rain during the period. Three smaller cohorts reached the river during March and April and the majority of these prawns did not emigrate but overwintered until the following spring. Growth during the summer period averaged an increase in carapace length of 1.2 mm/week, whereas growth in winter was slower in response to lower temperatures. After leaving the river, adolescent P. rnerguiensis spent a short time in the shallow beach zone near the mouth of the river before migrating off shore. The migration up until the time the prawns recruited into the off-shore fishery was estimated to take approximately 2 months. During this time the maximum growth was estimated as 15-mm increase in carapace length. The significance of these results is discussed in relation to the life history of the prawn in the south-eastern area of the Gulf of Carpentaria.

Shallow landslide mapping using freely accessible images: a case study in the Ribeira Valley, Brazil

2021 ◽  
Author(s):  
Helen Cristina Dias ◽  
Daniel Hölbling ◽  
Carlos Henrique Grohmann
Keyword(s):  
Environmental Changes ◽  
Mass Movement ◽  
Shallow Landslide ◽  
Google Earth ◽  
Shallow Landslides ◽  
Slope Position ◽  
Mass Movements ◽  
Visual Interpretation ◽  
High Resolution Data ◽  
Landslide Mapping

<p>Shallow landslide mapping is an important procedure for landslide assessment and is the first step to susceptibility, vulnerability, and risk analysis. Knowing the exact location of occurrence of this kind of natural hazard makes it possible to trace spatio-temporal patters and evaluate topographic influences. Landslides are very frequent along the Brazilian south and southeastern coast, where mass movements are triggered by heavy rainfall almost every year in the summer season (Dec-Mar), causing harm to society, such as the destruction of buildings, other infrastructure, and economic and human losses. Landslide recognition and mapping are poorly developed in Brazil, since no mapping guidelines exist, as well as due to low investments in mass movement prevention and mitigation actions. Thus, this research aimed to evaluate the use of freely accessible Google Earth Pro images for shallow landslides recognition and mapping. The study area is located in Itaóca and Apiaí counties, São Paulo state, in Ribeira Valley region, Brazil. Itaóca and Apiaí were affected by mass movements in January 2014, resulting in several economic and infrastructure damages, and 25 fatalities. The most recent post-event images available in Google Earth Pro were used, dated as of 08/10/2014. The visual criteria for landslide scars recognition and mapping were the absence of vegetation, shape and size, drainage network distance, slope position, planar rupture surface, and altimetric variation. As a reference for manual mapping contour and hydrography curves of 1:10.000 scale from the Geographic and Cartographic Institute of the State of São Paulo (for areas belonging to the municipality of Itaóca) and contour and hydrography curves of 1: 50.000 scale from the Brazilian Institute of Geography and Statistics (for the sectors belonging to the municipality of Apiaí) were used. The results showed that Google Earth Pro images are suitable for landslide recognition and mapping in a tropical environment. A total of 1,850 shallow landslides scars from the 2014 event with different sizes were mapped, where the smallest has 14 m² and the largest 9,539 m². They occurred under different morphological and lithological conditions, where most landslides are concentrated at slopes between 20 and 30°, south and southeast orientation, elevations of 600 to 800 m, concave curvatures, and in Quartz-Monzonite and Biotite Monzogranite rocks. The advantage of Google Earth images is that they are very high resolution data and free to access and use for everybody. However, the periods available on the software are limited. The event occurred in January of 2014 but it was only possible to access study area images of October of 2014, nine months after the event. In this way, it is important to verify if the mapping process is influenced by environmental changes, for example, vegetation recovery, that may cause interference for the visual interpretation. The inventory can be used as a basis for further analysis, such as for creating susceptibility and hotspot maps. Such products help to better understand shallow landslide dynamics in the study area, allowing comparison with other environments, and can support spatial planning and decision making of government authorities.</p>

WACANA, KUASA DAN AGAMA DALAM KONTESTASI PILGUB JAKARTA

ALQALAM ◽  
2017 ◽  
Vol 34 (2) ◽  
pp. 47
Author(s):  
Joko Priyanto
Keyword(s):  
Civil Society ◽  
Power Relations ◽  
Mass Movement ◽  
Power Structure ◽  
Hegemonic Discourse ◽  
Islamic Society

Religion Blasphemy addressed to Jakarta Governor who is also a candidate for Jakarta Governor Election 2017 is the beginning of a series of polemic along process of Jakarta Governor Election 2017. This case triggers friction between Islamic society as a civil society and government as authority. This research explored this case by using theory of power relations Foucault. The result shows that the mass movement of Islamic society is power from Islamic society knowledge. Power structure tries to discipline this movement by hegemony in form of discourse. However, hegemonic discourse from civil society (Islamic society) also tries to challenge. The fight of hegemonic in form of discourse becomes so viral in all media, element and institution. This research shows that the discourse of Leader and Diversity is a signifier empty which be contestation of giving meaning.   Keywords: knowledge, power, Foucoult, religion.

A new shallow landslides inventory for Southern Lunigiana (Tuscany, Italy) and analysis of predisposing factors

2018 ◽  
Vol 46 ◽  
pp. 149-154
Author(s):  
Enrico D'Addario ◽  
Emanuele Trefolini ◽  
Elisa Mammoliti ◽  
Michele Papasidero ◽  
Vincenzo Vacca ◽  
...  
Keyword(s):  
Shallow Landslides ◽  
Predisposing Factors

Forecasting Occurrence of Localized Heavy Rain and Tornado

2014 ◽  
Vol 134 (9) ◽  
pp. 604-607
Author(s):  
Shoji KAWASAKI ◽  
Masaaki KOYAMA ◽  
Shunsuke FUKAMI ◽  
Chisa KOBAYASHI
Keyword(s):  
Heavy Rain
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