Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 246 |
| Fachzeitschrift | Remote Sensing |
| Jahrgang | 11 |
| Ausgabenummer | 3 |
| Frühes Online-Datum | 26 Jan. 2019 |
| Publikationsstatus | Veröffentlicht - 1 Feb. 2019 |
Abstract
Middle-sized earth- and rock-filled dams with clay cores continue to settle by approximately 0.5-1.5% of their height for approximately 1-3 years after their construction phase. This paper investigates the use of high-resolution spaceborne Synthetic aperture Radar (SAR) interferometry to monitor this settlement process, with the case of the Gongming dam in China. The varieties of slope foreshortening and stretching in the radar coordinates are attributed to the radar's local incidence angle and the dam's slope heading, which are analysed in detail. Focusing on the embankment slope settlement analysis, the equations for calculating foreshortening and the line-of-sight deformation decomposition are derived in detail for the adjustment and data fusing. The scattering characteristics of different materials on the dam surface are analysed, including the grass slope, concrete slope, top road (crest), top wall, step, and ditch. According to the analysis of the precipitation data from a local meteorological station, the coherence losses on the slopes are mainly caused by surface moisture. Both the TerraSAR-X Spotlight (TSX-SL) data and the COSMO-SkyMed Strip Mode (CSK-SM) data are analysed by the stacking method to assess the slopes' deformations. The TSX-SL data results show the highest rate of settlement as 2 cm/yr on the top of the dam slope, consistent with the clay core shrinking process. The CSK-SM data show a similar trend in the lower part of the dam slope but underestimate the deformation in the upper part of the slope.
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in: Remote Sensing, Jahrgang 11, Nr. 3, 246, 01.02.2019.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Earth and Rock-Filled Dam Monitoring by High-Resolution X-Band Interferometry: Gongming Dam Case Study
AU - Li, Tao
AU - Motagh, Mahdi
AU - Wang, Mingzhou
AU - Zhang, Wei
AU - Gong, Chunlong
AU - Xiong, Xunan
AU - He, Jinping
AU - Chen, Lulu
AU - Liu, Jingnan
N1 - Funding information: This research was funded by the National Natural Science Foundation of China (NSFC), grant number 41674032, 41274048.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - Middle-sized earth- and rock-filled dams with clay cores continue to settle by approximately 0.5-1.5% of their height for approximately 1-3 years after their construction phase. This paper investigates the use of high-resolution spaceborne Synthetic aperture Radar (SAR) interferometry to monitor this settlement process, with the case of the Gongming dam in China. The varieties of slope foreshortening and stretching in the radar coordinates are attributed to the radar's local incidence angle and the dam's slope heading, which are analysed in detail. Focusing on the embankment slope settlement analysis, the equations for calculating foreshortening and the line-of-sight deformation decomposition are derived in detail for the adjustment and data fusing. The scattering characteristics of different materials on the dam surface are analysed, including the grass slope, concrete slope, top road (crest), top wall, step, and ditch. According to the analysis of the precipitation data from a local meteorological station, the coherence losses on the slopes are mainly caused by surface moisture. Both the TerraSAR-X Spotlight (TSX-SL) data and the COSMO-SkyMed Strip Mode (CSK-SM) data are analysed by the stacking method to assess the slopes' deformations. The TSX-SL data results show the highest rate of settlement as 2 cm/yr on the top of the dam slope, consistent with the clay core shrinking process. The CSK-SM data show a similar trend in the lower part of the dam slope but underestimate the deformation in the upper part of the slope.
AB - Middle-sized earth- and rock-filled dams with clay cores continue to settle by approximately 0.5-1.5% of their height for approximately 1-3 years after their construction phase. This paper investigates the use of high-resolution spaceborne Synthetic aperture Radar (SAR) interferometry to monitor this settlement process, with the case of the Gongming dam in China. The varieties of slope foreshortening and stretching in the radar coordinates are attributed to the radar's local incidence angle and the dam's slope heading, which are analysed in detail. Focusing on the embankment slope settlement analysis, the equations for calculating foreshortening and the line-of-sight deformation decomposition are derived in detail for the adjustment and data fusing. The scattering characteristics of different materials on the dam surface are analysed, including the grass slope, concrete slope, top road (crest), top wall, step, and ditch. According to the analysis of the precipitation data from a local meteorological station, the coherence losses on the slopes are mainly caused by surface moisture. Both the TerraSAR-X Spotlight (TSX-SL) data and the COSMO-SkyMed Strip Mode (CSK-SM) data are analysed by the stacking method to assess the slopes' deformations. The TSX-SL data results show the highest rate of settlement as 2 cm/yr on the top of the dam slope, consistent with the clay core shrinking process. The CSK-SM data show a similar trend in the lower part of the dam slope but underestimate the deformation in the upper part of the slope.
KW - Correlation
KW - Earth- and rock-fill dam
KW - Hydraulic structural design
KW - InSAR
KW - Spotlight
KW - TerraSAR-X
UR - http://www.scopus.com/inward/record.url?scp=85061357486&partnerID=8YFLogxK
U2 - 10.3390/rs11030246
DO - 10.3390/rs11030246
M3 - Article
AN - SCOPUS:85061357486
VL - 11
JO - Remote Sensing
JF - Remote Sensing
SN - 2072-4292
IS - 3
M1 - 246
ER -