IEEE Geoscience and Remote Sensing Magazine - March 2020 - 150
Available at: https://cred.be/sites/default/files/adsr_2017
.pdf.
[2] D. Cruden and D. Varnes, "Landslides types and processes," in
Landslides: Investigation and Mitigation, Washington, DC: Transportation Research Board, 1996, ch. 3, pp. 36-75. [Online].
Available: http://onlinepubs.trb.org/Onlinepubs/sr/sr247/sr247
-003.pdf
[3] M. J. Froude and D. Petley, "Global fatal landslide occurrence
from 2004 to 2016," Nat. Hazards Earth Syst. Sci., vol. 18, no. 8,
pp. 2161-2181, 2018. doi: 10.5194/nhess-18-2161-2018.
[4] S. G. Evans, R. H. Guthrie, N. J. Roberts, and N. F. Bishop, "The
disastrous 17 February 2006 rockslide-debris avalanche on
Leyte Island, Philippines: A catastrophic landslide in tropical
mountain terrain," Nat. Hazards Earth Syst. Sci., vol. 7, no. 1,
pp. 89-101, 2007. doi: 10.5194/nhess-7-89-2007.
[5] SafeLand, "Living with landslide risk in Europe: Assessment,
effects of global change, and risk management strategies," 7th
Framework Programme, Norwegian Geotechnical Institute,
Oslo, Norway, 2011.
[6] M. Stähli et al., "Monitoring and prediction in early warning systems for rapid mass movements," Nat. Hazards Earth
Syst. Sci., vol. 15, no. 4, pp. 905-917, 2015. doi: 10.5194/
nhess-15-905-2015.
[7] E. Intrieri, G. Gigli, F. Mugnai, R. Fanti, and N. Casagli, "Design
and implementation of a landslide early warning system," Eng.
Geol., vols. 147-148, pp. 124-136, 2012. doi: 10.1016/j.enggeo
.2012.07.017.
[8] M. Barla and F. Antolini, "An integrated methodology for
landslides' early warning systems," Landslides, vol. 13, no. 2,
pp. 215-228, 2016. doi: 10.1007/s10346-015-0563-8.
[9] M. Calvello, "Early warning strategies to cope with landslide
risk," Rivista Italiana di Geotecnica, vol. 2/17, pp. 63-91, 2017.
doi: 10.19199/2017.2.0557-1405.063.
[10] G. Lollino, M. Arattano, and M. Cuccureddu, "The use of the
automatic inclinometric system for landslide early warning:
The case of Cabella Ligure (north-western Italy)," Phys. Chem.
Earth, Parts A/B/C, vol. 27, no. 36, pp. 1545-1550, 2002. doi:
10.1016/S1474-7065(02)00175-4.
[11] A. Manconi and D. Giordan, "Landslide early warning
based on failure forecast models: The example of the Mt.
de La Saxe rockslide, northern Italy," Nat. Hazards Earth
Syst. Sci., vol. 15, no. 7, pp. 1639-1644, 2015. doi: 10.5194/
nhess-15-1639-2015.
[12] R. L. Baum and J. W. Godt, "Early warning of rainfall-induced
shallow landslides and debris flows in the USA," Landslides,
vol. 7, no. 3, pp. 259-272, 2010. doi: 10.1007/s10346-009-0177-0.
[13] S. Uhlemann et al., "Assessment of ground-based monitoring techniques applied to landslide investigations," Geomorphology, vol. 253, pp. 438-451, 2016. doi: 10.1016/
j.geomorph.2015.10.027.
[14] A. Moreira, P. Prats-Iraola, M. Younis, G. Krieger, I. Hajnsek,
and K. Papathanassiou, "A tutorial on synthetic aperture radar,"
IEEE Geosci. Remote Sens. Mag., vol. 1, no. 1, pp. 6-43, 2013. doi:
10.1109/MGRS.2013.2248301.
[15] J. Elliott, R. Walters, and T. Wright, "The role of space-based observation in understanding and responding to active tectonics
150
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
and earthquakes," Nature Commun., vol. 7, no. 1, art. no. 13844,
2016. doi: 10.1038/ncomms13844.
M. Shirzaei and R. Bürgmann, "Global climate change and local land subsidence exacerbate inundation risk to the San Francisco Bay Area," Sci. Adv., vol. 4, no. 3, art. no. eaap9234, 2018.
doi: 10.1126/sciadv.aap9234.
T. J. Wright, B. Parsons, P. C. England, and E. J. Fielding, "InSAR
observations of low slip rates on the major faults of western Tibet," Sci., vol. 305, no. 5681, pp. 236-239, 2004. doi: 10.1126/
science.1096388.
C. Colesanti and J. Wasowski, "Investigating landslides with
space-borne Synthetic Aperture Radar (SAR) interferometry,"
Eng. Geol., vol. 88, no. 3-4, pp. 173-199, 2006. doi: 10.1016/
j.enggeo.2006.09.013.
A. Singleton, Z. Li, T. Hoey, and J. P. Muller, "Evaluating subpixel offset techniques as an alternative to D-InSAR for monitoring episodic landslide movements in vegetated terrain," Remote Sens. Environ., vol. 147, pp. 133-144, 2014. doi: 10.1016/
j.rse.2014.03.003.
G. E. Hilley, R. Burgmann, A. Ferretti, F. Novali, and F. Rocca,
"Dynamics of slow-moving landslides from permanent scatterer analysis," Sci., vol. 304, no. 5679, pp. 1952-1955, 25 June
2004. doi: 10.1126/science.1098821.
R. Tomás, Z. Li, P. Liu, A. Singleton, T. Hoey, and X. Cheng,
"Spatiotemporal characteristics of the Huangtupo landslide in
the Three Gorges region (China) constrained by radar interferometry," Geophys. J. Int., vol. 197, no. 1, pp. 213-232, 2014. doi:
10.1093/gji/ggu017.
J. Wasowski and F. Bovenga, "Investigating landslides and
unstable slopes with satellite Multi Temporal Interferometry:
Current issues and future perspectives," Eng. Geology, vol. 174,
pp. 103-138, 2014. doi: 10.1016/j.enggeo.2014.03.003.
J. Cohen-Waeber, R. Bürgmann, E. Chaussard, C. Giannico,
and A. Ferretti, "Spatiotemporal patterns of precipitation-modulated landslide deformation from independent component
analysis of InSAR time series," Geophys. Res. Lett., vol. 45, no. 4,
pp. 1878-1887, 2018. doi: 10.1002/2017GL075950.
F. Bovenga, J. Wasowski, D. O. Nitti, R. Nutricato, and M. T.
Chiaradia, "Using COSMO/SkyMed X-band and ENVISAT
C-band SAR interferometry for landslides analysis," Remote
Sens. Environ., vol. 119, pp. 272-285, 2012. doi: 10.1016/
j.rse.2011.12.013.
K. Dai et al., "Monitoring activity at the Daguangbao megalandslide (China) using Sentinel-1 TOPS time series interferometry," Remote Sens. Environ., vol. 186, pp. 501-513, 2016. doi:
10.1016/j.rse.2016.09.009.
V. Tofani, F. Raspini, F. Catani, and N. Casagli, "Persistent scatterer interferometry (PSI) technique for landslide characterization and monitoring," Remote Sens., vol. 5, no. 3, pp. 1045-1065,
2013. doi: 10.3390/rs5031045.
PreventionWeb, "Can satellites be used as an early warning
system for landslides?" 2017. [Online]. Available: https://www
.preventionweb.net/news/view/54209.
E. Intrieri et al., "The Maoxian landslide as seen from space: Detecting precursors of failure with Sentinel-1 data," Landslides, vol.
15, no. 1, pp. 123-133, 2018. doi: 10.1007/s10346-017-0915-7.
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