TY  - JOUR
A1  - Teshebaeva, Kanayim
A1  - Roessner, Sigrid
A1  - Echtler, Helmut Peter
A1  - Motagh, Mahdi
A1  - Wetzel, Hans-Ulrich
A1  - Molodbekov, Bolot
T1  - ALOS/PALSAR InSAR Time-Series Analysis for Detecting Very Slow-Moving Landslides in Southern Kyrgyzstan
JF  - Remote sensing
N2  - This study focuses on evaluating the potential of ALOS/PALSAR time-series data to analyze the activation of deep-seated landslides in the foothill zone of the high mountain Alai range in the southern Tien Shan (Kyrgyzstan). Most previous field-based landslide investigations have revealed that many landslides have indicators for ongoing slow movements in the form of migrating and newly developing cracks. L-band ALOS/PALSAR data for the period between 2007 and 2010 are available for the 484 km(2) area in this study. We analyzed these data using the Small Baseline Subset (SBAS) time-series technique to assess the surface deformation related to the activation of landslides. We observed up to +/- 17 mm/year of LOS velocity deformation rates, which were projected along the local steepest slope and resulted in velocity rates of up to -63 mm/year. The obtained rates indicate very slow movement of the deep-seated landslides during the observation time. We also compared these movements with precipitation and earthquake records. The results suggest that the deformation peaks correlate with rainfall in the 3 preceding months and with an earthquake event. Overall, the results of this study indicated the great potential of L-band InSAR time series analysis for efficient spatiotemporal identification and monitoring of slope activations in this region of high landslide activity in Southern Kyrgyzstan.
Y1  - 2015
U6  - https://doi.org/10.3390/rs70708973
SN  - 2072-4292
VL  - 7
IS  - 7
SP  - 8973
EP  - 8994
PB  - MDPI
CY  - Basel
ER  -