Management of a typhoon-induced landslide in Otomura (Japan)

Fujisawa, Kazunori; Marcato, Gianluca; Nomura, Yasuhiro; Pasuto, Alessandro

doi:10.1016/j.geomorph.2010.09.027

Cited by 18 publications

(3 citation statements)

References 4 publications

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“…In such a way, practical applications of land surface maps in 2D and 3D representations enable the evaluation of the slope steepness quantitatively. In turn, the information retrieved from the calculated rates at which landslides are dismantling mountain slopes can be used for hazard and risk assessment for practical purposes of engineering geology, as well as for estimating potential slope instability [71]. Furthermore, other applications of land surface maps include the evaluation of environmental risks caused by climatic factors, such as precipitation intensity and the repeatability of rainfall or downpours [72,73] and visualising water surface dynamics in the context of flood and drought applications [74].…”

Section: Discussionmentioning

confidence: 99%

Quantitative Morphometric 3D Terrain Analysis of Japan Using Scripts of GMT and R

Lemenkova

Debeir

2023

Land

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In this paper, we describe two related scripting methods of cartographic data processing and visualization that provide 2D and 3D mapping of Japan with different algorithm complexity. The first algorithm utilizes Generic Mapping Toolset (GMT), which is known as an advanced console-based program for spatial data processing. The modules of GMT combine the functionality of scripting with the aspects of geoinformatics, which is especially effective for the rapid analysis of large geospatial datasets, multi-format data processing, and mapping in 2D and 3D modes. The second algorithm presents the use of the R programming language for cartographic visualization and spatial analysis. This R method utilizes the packages ‘tmap’, ‘raster’, ‘maps’, and ‘mapdata’ to model the morphometric elements of the Japanese archipelago, such as slope, aspect, hillshade and elevation. The general purpose graphical package ‘ggplot2’ of R was used for mapping the prefectures of Japan. The two scripting approaches demonstrated an established correspondence between the programming languages and cartography determined with the use of scripts for data processing. They outperform several well-known and state-of-the-art GIS methods for mapping due to their high automation of data processing. Cartography has largely reflected recent advances in data science, the rapid development of scripting languages, and transfer in the approaches of data processing. This extends to the shift from the traditional GIS to programming languages. As a response to these new challenges, we demonstrated in this paper the advantages of using scripts in mapping, which consist of repeatability and the flexible applicability of scripts in similar works.

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Section: Discussionmentioning

confidence: 99%

Quantitative Morphometric 3D Terrain Analysis of Japan Using Scripts of GMT and R

Lemenkova

Debeir

2023

Land

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“…For example, during the summer season (August-September), the Japanese archipelago is often struck by violent typhoons with extremely intense rainfalls, which cause a large number of disasters, e.g. floods, debris flows, and landslides (Wang and Sassa, 2003;Fujisawa et al, 2010). According to the statistics of the Ministry of Land, Infrastructure, Transport, and Tourism (MLIT), there are 200,000 dangerous valleys and slopes in Japan, and about 1,000 landslide disasters reported annually (Osanai et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous analysis of slope instabilities on a small catchment-scale using coupled surface and subsurface flows

Zhu

Ishikawa

Subramanian

et al. 2020

Engineering Geology

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“…The Japanese archipelago is often struck by violent typhoons with extremely intense rainfalls causing risk situations in floods, debris flows and landslides (Fujisawa et al, 2010). According to the statistics of Dahal et al (2008), from 1951 to 2005, there were 163 typhoon events hit the Japanese archipelago.…”

Section: Introductionmentioning

confidence: 99%

Simulation of runoff and infiltration using iterative cross-coupled surface and subsurface flows

Zhu

Ishikawa

Subramanian

2020

JGS Special Publication

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An iterative cross-coupled surface and subsurface flows model is proposed to simulate the runoff generation and infiltration of a wide area hillside slope. Surface water on hillside slope was modeled as 2D shallow water equations and subsurface flow was modeled as 3D Richards's equation. The infiltration capacity was estimated by Green-Ampt infiltration model. The water depth calculated by 2D shallow water equations was applied to 3D Richards's equation as the water head boundary condition and the infiltration or exfiltration calculated by Richards's equation was applied to the runoff simulation as source item. In this study, first, an approximation of shallow water equations that simplifies the equations of motion by considering only the main contributions was used. Then, the simplified runoff model was validated by the extensively used tilted impermeable V-catchment example with only simulating surface runoff flows. The iterative cross-coupled surface and subsurface flows model was verified by a simple 2D unsaturated-saturated model. The simulation results show that the iterative cross-coupled surface and subsurface flows model can reproduce rainfall generated runoff and infiltration. Finally, the runoff generation and infiltration of a natural mountain slope in Hokkaido were simulated, as the runoff caused several slope failures in this area during Typhoon 10 in 2016.

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Management of a typhoon-induced landslide in Otomura (Japan)

Cited by 18 publications

References 4 publications

Quantitative Morphometric 3D Terrain Analysis of Japan Using Scripts of GMT and R

Quantitative Morphometric 3D Terrain Analysis of Japan Using Scripts of GMT and R

Simultaneous analysis of slope instabilities on a small catchment-scale using coupled surface and subsurface flows

Simulation of runoff and infiltration using iterative cross-coupled surface and subsurface flows

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