date: 2019-01-30T13:11:23Z
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pdf:docinfo:title: Earth and Rock-Filled Dam Monitoring by High-Resolution X-Band Interferometry: Gongming Dam Case Study
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subject: 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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dc:title: Earth and Rock-Filled Dam Monitoring by High-Resolution X-Band Interferometry: Gongming Dam Case Study
modified: 2019-01-30T13:11:23Z
cp:subject: 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.
pdf:docinfo:subject: 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.
pdf:docinfo:creator: Tao Li, Mahdi Motagh, Mingzhou Wang, Wei Zhang, Chunlong Gong, Xunan Xiong, Jinping He, Lulu Chen and Jingnan Liu
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meta:author: Tao Li, Mahdi Motagh, Mingzhou Wang, Wei Zhang, Chunlong Gong, Xunan Xiong, Jinping He, Lulu Chen and Jingnan Liu
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Creation-Date: 2019-01-26T04:53:51Z
Author: Tao Li, Mahdi Motagh, Mingzhou Wang, Wei Zhang, Chunlong Gong, Xunan Xiong, Jinping He, Lulu Chen and Jingnan Liu
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dc:description: 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.
Keywords: spotlight; earth- and rock-fill dam; InSAR; correlation; TerraSAR-X; hydraulic structural design
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dc:creator: Tao Li, Mahdi Motagh, Mingzhou Wang, Wei Zhang, Chunlong Gong, Xunan Xiong, Jinping He, Lulu Chen and Jingnan Liu
description: 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.
dcterms:created: 2019-01-26T04:53:51Z
Last-Modified: 2019-01-30T13:11:23Z
dcterms:modified: 2019-01-30T13:11:23Z
title: Earth and Rock-Filled Dam Monitoring by High-Resolution X-Band Interferometry: Gongming Dam Case Study
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pdf:docinfo:keywords: spotlight; earth- and rock-fill dam; InSAR; correlation; TerraSAR-X; hydraulic structural design
pdf:docinfo:modified: 2019-01-30T13:11:23Z
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creator: Tao Li, Mahdi Motagh, Mingzhou Wang, Wei Zhang, Chunlong Gong, Xunan Xiong, Jinping He, Lulu Chen and Jingnan Liu
dc:subject: spotlight; earth- and rock-fill dam; InSAR; correlation; TerraSAR-X; hydraulic structural design
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meta:keyword: spotlight; earth- and rock-fill dam; InSAR; correlation; TerraSAR-X; hydraulic structural design
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pdf:docinfo:created: 2019-01-26T04:53:51Z