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Record 1 of 1185
Advances in Landslide Hazard Forecasting: Evaluation of Global and Regional Modeling Approach
Author and Affiliation:
Kirschbaum, Dalia B.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Adler, Robert(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Hone, Yang(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Kumar, Sujay(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Peters-Lidard, Christa(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Lerner-Lam, Arthur(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: A prototype global satellite-based landslide hazard algorithm has been developed to identify areas that exhibit a high potential for landslide activity by combining a calculation of landslide susceptibility with satellite-derived rainfall estimates. A recent evaluation of this algorithm framework found that while this tool represents an important first step in larger-scale landslide forecasting efforts, it requires several modifications before it can be fully realized as an operational tool. The evaluation finds that the landslide forecasting may be more feasible at a regional scale. This study draws upon a prior work's recommendations to develop a new approach for considering landslide susceptibility and forecasting at the regional scale. This case study uses a database of landslides triggered by Hurricane Mitch in 1998 over four countries in Central America: Guatemala, Honduras, EI Salvador and Nicaragua. A regional susceptibility map is calculated from satellite and surface datasets using a statistical methodology. The susceptibility map is tested with a regional rainfall intensity-duration triggering relationship and results are compared to global algorithm framework for the Hurricane Mitch event. The statistical results suggest that this regional investigation provides one plausible way to approach some of the data and resolution issues identified in the global assessment, providing more realistic landslide forecasts for this case study. Evaluation of landslide hazards for this extreme event helps to identify several potential improvements of the algorithm framework, but also highlights several remaining challenges for the algorithm assessment, transferability and performance accuracy. Evaluation challenges include representation errors from comparing susceptibility maps of different spatial resolutions, biases in event-based landslide inventory data, and limited nonlandslide event data for more comprehensive evaluation. Additional factors that may improve algorithm performance accuracy include incorporating additional triggering factors such as tectonic activity, anthropogenic impacts and soil moisture into the algorithm calculation. Despite these limitations, the methodology presented in this regional evaluation is both straightforward to calculate and easy to interpret, making results transferable between regions and allowing findings to be placed within an inter-comparison framework. The regional algorithm scenario represents an important step in advancing regional and global-scale landslide hazard assessment and forecasting.
Publication Date: Jan 01, 2010
Document ID:
20100031066
(Acquired Sep 01, 2010)
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Preprint
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: LANDSLIDES; ENVIRONMENT EFFECTS; SATELLITE OBSERVATION; TECTONICS; SOIL MOISTURE; MAN ENVIRONMENT INTERACTIONS; HAZARDS; HURRICANES; FORECASTING; INVENTORIES
Miscellaneous Notes: To be published in Environmental Earth Sciences, Special Issue: Remote Sensing of Landslide Hazards
Availability Source: Other Sources
Availability Notes: Abstract Only
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