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Example of a hazard map. A hazard map is a map that highlights areas that are affected by or are vulnerable to a particular hazard. They are typically created for natural hazards, such as earthquakes, volcanoes, landslides, flooding and tsunamis. Hazard maps help prevent serious damage and deaths. [1]
From 1983 through 1994, CGS was directed to produce Landslide Hezard Identification Maps under the State's Landslide Hazard Identification Act. Though of high quality and designed for land-use planning purposes, the Act did not require local governments to use the maps. The Act was repealed January 1, 1995 per a sunset provision in the Act. [2]
The factors that have been used for landslide hazard analysis can usually be grouped into geomorphology, geology, land use/land cover, and hydrogeology. Since many factors are considered for landslide hazard mapping, GIS is an appropriate tool because it has functions of collection, storage, manipulation, display, and analysis of large amounts ...
Hazard data : this map of the USGS (United States Geological Survey). Additional data (rivers, borders, cities) : Demis; compass rose from Compass rose pale.svg (opacified) created by Fibonacci under GFDL ; scale from Image:Scale_kilometres_miles_svg.svg by Sémhur under Public Domain.
Landslide dating is an interesting topic in the evaluation of hazard. The knowledge of the landslide frequency is a fundamental element for any kind of probabilistic evaluation. Furthermore, the evaluation of the age of the landslide permits to correlate the trigger to specific conditions, as earthquakes or periods of intense rains. It is ...
Historical maps of the ancient landslide complex, including one from the California Geological Survey, documented the slide's boundary to be well north of the Portuguese Bend Reserve, almost ...
A large landslide entered Sullorsuaq Strait, generating a megatsunami which struck Alluttoq Island, where it had a run-up height of 45 to 70 metres (148 to 230 ft). [15] ~2800 BCE Zion Canyon, Utah, US: 0.286 km 3: Landslide created the currently level floor of Zion Canyon inside Zion National Park. [21] ~1920 BCE Jishi Gorge, Qinghai Province ...
Hazard data : this map of the USGS (United States Geological Survey). Additional data (rivers, borders, cities) : Demis compass rose from Compass rose pale.svg (opacified) created by Fibonacci under GFDL ; scale from Image:Scale_kilometres_miles_svg.svg by Sémhur under Public Domain.