Geomorphological maps for Japanese volcanoes by Geographical Survey Institute, Japan
Natural hazard mitigation
Applied geomorphology ; Catastrophe ; Classification ; Debris flow ; Forecast ; Geographical information system ; Geomorphological map ; Japan ; Land use ; Natural hazards ; Volcanic eruption ; Volcanism ; Volcano
Geographical Survey Institute is going to produce Land condition maps of volcano about active volcanoes given the priority by the Geodesy Council. This paper introduces these land condition maps of volcano and other geomorphological maps
for the research of volcanic disaster, especially the research of debris avalanche on Bandai Volcano.
The volcano-tectonic map of Etna volcano, 1:100.000 scale : an integrated approach based on a morphotectonic analysis from high-resolution DEM constrained by geologic, active faulting and seismotectonic data
Digital elevation model ; Earthquake ; Etna ; Fault ; Geological map ; Geomorphology ; Italy ; Natural hazards ; Seismicity ; Sicilia ; Tectonics ; Volcanism ; Volcano
A new volcano-tectonic map of Etna volcano has been compiled through a morphotectonic analysis performed with detailed field mapping, high-resolution DEM and orthoimages, constrained by seismotectonic data. In this study, the AA. present
a homogeneous mapping of the volcano-tectonic and tectonic elements on the whole volcano, consistent with the updated knowledge on the geology and active tectonics observed in historical times. Finally, a seismotectonic model summarises the information regarding
seismic hazard, with reference to the additional, potentially severe effects induced by surface faulting. - (NF)
A catastrophic lahar began on 30 October 1998, as hurricane precipitation triggered a small flank collapse of Casita volcano, a complex and probably dormant stratovolcano. This emphasizes the need, in volcanohazard assessments, for including
the potential for non-eruption-related collapse lahars with the more predictable potential of their syneruption analogues. The flow behaviour emphasizes that volcano collpses can yield not only volcanic debris avalanches with restricted runouts, but also mobile
The AA. present the geological and volcanic setting of the Misti volcano which encompasses 2 edifices : the old Misti stratovolcano and the young Misti stratocone. They analyze the stratigraphy and the chronology of its eruptive activity
, in particular over the past 100,000 years : 7 compound groups of deposits record the late Pleistocene eruptive of the modern Misti stratocone. Then, they aim to assess the volcanic hazards of future eruptions at Misti, based on mapping, recent eruptive deposits
, and models used on similar stratovolcanoes : 700,000 people in the Arequipa-Chiguata region are threatened by at least 4 types of volcanic hazards.
Geomorphological survey for mass-movement hazard assessment
Natural hazard mitigation
Earthquake ; Geomorphological mapping ; Heavy rain ; Japan ; Landslide ; Mass movement ; Mountain ; Natural hazards ; Slope dynamics ; Volcano
Geomorphological survey is very useful for hazard assessment of mountainous area. This paper deals with basic ideas and mapping method of mass-movement hazard assessment survey from the geomorphological viewpoint.
Mapping landforms for landslide hazards assessment on the SW flank of Pico de Orizaba volcano, Puebla-Veracruz, Mexico
Geographical information system ; Geomorphometry ; Inventory ; Landslide ; Mexico ; Model ; Natural hazards ; Puebla ; Spatial distribution ; Thematic map ; Veracruz ; Volcano
This work illustrates a method to analyze the distribution of landslides and characterize landforms that are prone to slope instability. For the Río Chiquito-Barranca del Muerto watershed on the southwestern flank of Pico de Orizaba volcano
, landforms and landslide distribution were ascertained through a landslide inventory map created from multi-temporal aerial photographs, field investigations and, an adaptation of the Landslide Hazard Zonation Protocol of the Washington State Department
of Natural Resources, Forest Practices Division, in a GIS-based technology. This analysis divided the watershed into 12 mass-wasting landforms that were assigned slope-stability hazard ratings from low to very high. The overall hazard rating
Il est urgent de réduire les risques volcaniques et volcano-glaciaires, car la plupart des volcans très dangereux se situent dans les montagnes peuplées du Tiers-Monde. Proposition d'un programme de réduction des risques en 5 points : identification
des volcans dangereux; surveillance volcanique et prévision des éruptions; évaluation et zonage des risques (volcano-glaciaires inclus) et des populations vulnérables; mesures de protection et défense; planification préventive et des secours en cas de
In october 1998, a precipitation-triggered flank collapse occurred at Casita volcano, leading to a devastating lahar. In this paper the failure volume was calculated using a range of methods. Several pre- and post-failure digital elevation models
of studying compositionally-zoned magma chambers. They are also important in volcanic hazard studies, where the past pattern of explosive activity is used as a guide to the probable future behaviour of a volcano.
Pyroclastic studies can help determine the internal plumbing systems and magma release mechanisms of volcanoes, for example where they yield the magma output rate and provide evidence for magma mixing, and fall deposits supply the best means
Lahar hazard micro-zonation and risk assessment in Yogyakarta city, Indonesia
Urban hazards and risks; consequences of large eruptions and earthquakes
Geomorphometry ; Indonesia ; Jawa ; Natural hazards ; Terminology ; Thematic map ; Urban area ; Volcanic eruption ; Volcanism ; Vulnerability
Yogyakarta urban area is located in Central Java on the fluvio-volcanic plain beside Merapi volcano. Since the last eruption of Merapi in November 1994, the Code river, which goes across this city, is particularly threatened by lahars. A detailed
hazard map (1/2,000 scale) is drawn, based on morphometric surveys of the Code channel and on 4 scenarios of discharge. An additional risk assessment revealed that about 13,000 people live at risk along this river. However, the risk level varies between
This study addresses the production of a lahar risk map using the 2 approaches : Flow Simulation Software (FSS) and Geochronological Method (GM) for a study area located at Popocatépetl volcano – Central Mexico. Santiago Xalitzintla, a town located
on the northern flank of Popocatépetl volcano, where volcanic activity in recent centuries has triggered numerous lahars that have endangered local inhabitants, has been used for the case study. Results from FSS did not provide satisfactory findings because
they were not consistent with lahar sediment observations made during fieldwork. By contrast, the GM produced results consistent with these observations, and therefore we use them to assess the hazard and produce the risk map for the study area.