Detailed rockslide mapping in northern Norway with small baseline and persistent scatterer interferometric SAR time series methods

被引:129
作者
Lauknes, T. R. [1 ]
Shanker, A. Piyush [2 ,3 ]
Dehls, J. F. [4 ]
Zebker, H. A. [2 ,3 ]
Henderson, I. H. C. [4 ]
Larsen, Y. [1 ]
机构
[1] Norut Tromso AS, NO-9294 Tromso, Norway
[2] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA
[3] Stanford Univ, Dept Geophys, Stanford, CA 94305 USA
[4] Geol Survey Norway, NO-7491 Trondheim, Norway
关键词
Small baseline; SBAS; PSI; Rockslides; SAR interferometry; Ground displacements; RADAR INTERFEROMETRY; SURFACE DEFORMATION; ALGORITHM; LANDSLIDES;
D O I
10.1016/j.rse.2010.04.015
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Rockslides have a high socioeconomic and environmental Importance in many countries. Norway is particularly susceptible to large rockslides due to its many fjords and steep mountains One of the most dangerous hazards related with rock slope failures are tsunamis that can lead to large loss of life It is therefore very important to systematically identify potential unstable rock slopes Traditional landslide monitoring techniques are expensive and time consuming. Differential satellite interferometric synthetic aperture radar (InSAR) is an invaluable tool for land displacement monitoring Improved access to time series of satellite data has led to the development of several innovative multitemporal algorithms. Small baseline (SB) methods are based on combining and inverting a set of unwrapped interferograms that are computed with a small perpendicular baseline in order to reduce spatial phase decorrelation Another well proven technique is the persistent scatterer interferometric method (PSI) that is based on analysis of persistent point targets In this paper, we apply both approaches to study several rockslide sites in Troms County in the far north of Norway. Moreover, we take the opportunity to address the difference and similarities between the SB and the PSI multitemporal InSAR methods for displacement studies in rural terrain. (C) 2010 Elsevier Inc All rights reserved
引用
收藏
页码:2097 / 2109
页数:13
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