A New Approach Based on Terrestrial Remote-sensing Techniques for Rock Fall Hazard Assessment

2015 ◽  
pp. 69-87 ◽  
Author(s):  
Paolo Mazzanti ◽  
Alessandro Brunetti ◽  
Alberto Bretschneider
Keyword(s):  
Remote Sensing ◽  
Hazard Assessment ◽  
Rock Fall ◽  
New Approach ◽  
Remote Sensing Techniques

Geologic Hazard Assessment of Slopeland Villages Using Remote Sensing Techniques

2015 ◽  
Vol 764-765 ◽  
pp. 1095-1099
Author(s):  
Shu Rong Yang ◽  
Yi Lung Yeh
Keyword(s):  
Remote Sensing ◽  
Hazard Assessment ◽  
Image Interpretation ◽  
Remote Sensing Image ◽  
Assessment Method ◽  
Geologic Hazard ◽  
Susceptibility Maps ◽  
Hazard Zone ◽  
Geologic Maps ◽  
Remote Sensing Techniques

This study focuses on 53 villages located in the slopelands of Pingtung County. Remote sensing image interpretation techniques are used to identify geologic hazard areas. GIS map overlay analysis of environmental geologic maps, landslide susceptibility maps and potential debris flow torrent maps provided by local and regional governments are used to further interpret and correctly identify the extent of the geologic hazard zone. This study successfully combines both GIS and GPS techniques, and according to data analysis results, constructs a slopeland village geologic hazard assessment method.

Remote sensing based assessment of hazards from glacier lake outbursts: a case study in the Swiss Alps

2002 ◽  
Vol 39 (2) ◽  
pp. 316-330 ◽  
Author(s):  
Christian Huggel ◽  
Andreas Kääb ◽  
Wilfried Haeberli ◽  
Philippe Teysseire ◽  
Frank Paul
Keyword(s):  
Remote Sensing ◽  
Hazard Assessment ◽  
Swiss Alps ◽  
High Mountain ◽  
Mountain Areas ◽  
Runout Distance ◽  
Hazard Potential ◽  
Empirical Relations ◽  
Scale Levels ◽  
Remote Sensing Techniques

Glacier lakes are a common phenomenon in high mountain areas. Outbursts from glacier lakes have repeatedly caused the loss of human lives as well as severe damage to local infrastructure. In several high mountain ranges around the world, a grave uncertainty about the hazard potential of glacier lakes still exists, especially with respect to the effects of accelerating rates of glacier retreat as a consequence of atmospheric warming. Area-wide detection and modeling of glacier lake hazard potentials is, therefore, a major challenge. In this study, an approach integrating three scale levels allows for the progressive focus on critical glacier lakes. Remote sensing methods for application in glacier lake hazard assessment are presented, and include channel indexing, data fusion, and change detection. Each method matches the requirements of a certain scale level. For estimating potential disaster amplitudes, assessments must be made of maximum discharge and runout distance of outbursts floods and debris flows. Existing empirical relations are evaluated and complementary ones as derived from available data are proposed. Tests with observations from a recent outburst event from a moraine-dammed lake in the Swiss Alps show the basic applicability of the proposed techniques and the usefulness of empirical relations for first hazard assessments. In particular, the observed runout distance of the debris flow resulting from the outburst does not exceed the empirically estimated maximum runout distance. A list of decision criteria and related remote sensing techniques are discussed in conclusion. Such a list is an essential tool for evaluating the hazard potential of a lake. A systematic application of remote sensing based methods for glacier lake hazard assessment is recommended.Key words: glacier lake outburst, hazard potential, remote sensing, empirical parameters.

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