Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California
The levee system in California’s Sacramento-San Joaquin Delta helps protect freshwater quality in a critical estuarine ecosystem that hosts substantial agricultural infrastructure and a large human population. We use space-based synthetic aperture radar interferometry (InSAR) to provide synoptic ver...
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ftcdlib:oai:escholarship.org/ark:/13030/qt15g1b9tm 2023-05-15T16:00:31+02:00 Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California Brooks, Benjamin A Bawden, Gerald Manjunath, Deepak Werner, Charles Knowles, Noah Foster, James Dudas, Joel Cayan, Dan 2012-01-01 application/pdf https://escholarship.org/uc/item/15g1b9tm unknown eScholarship, University of California qt15g1b9tm https://escholarship.org/uc/item/15g1b9tm CC-BY CC-BY San Francisco Estuary and Watershed Science, vol 10, iss 1 Delta subsidence levee compaction space geodesy interferometry Geological and Earth Sciences/Geosciences article 2012 ftcdlib 2020-02-07T23:53:51Z The levee system in California’s Sacramento-San Joaquin Delta helps protect freshwater quality in a critical estuarine ecosystem that hosts substantial agricultural infrastructure and a large human population. We use space-based synthetic aperture radar interferometry (InSAR) to provide synoptic vertical land motion measurements of the Delta and levee system from 1995 to 2000. We find that Delta ground motion reflects seasonal hydrologic signals superimposed on average subsidence trends of 3-20 mm/yr. Because the measurements are insensitive to subsidence associated with peat thickness variations over Delta-island length scales, it is most likely that InSAR rates reflect underlying Quaternary sedimentary column compaction. We combine InSAR rates with sea-level rise scenarios to quantify 21st century levee overtopping potential. If left unmitigated, it is likely that 50 to 100 years from now much of the levee system will subside below design thresholds. Article in Journal/Newspaper Delta Island University of California: eScholarship |
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Open Polar |
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University of California: eScholarship |
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ftcdlib |
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unknown |
topic |
Delta subsidence levee compaction space geodesy interferometry Geological and Earth Sciences/Geosciences |
spellingShingle |
Delta subsidence levee compaction space geodesy interferometry Geological and Earth Sciences/Geosciences Brooks, Benjamin A Bawden, Gerald Manjunath, Deepak Werner, Charles Knowles, Noah Foster, James Dudas, Joel Cayan, Dan Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California |
topic_facet |
Delta subsidence levee compaction space geodesy interferometry Geological and Earth Sciences/Geosciences |
description |
The levee system in California’s Sacramento-San Joaquin Delta helps protect freshwater quality in a critical estuarine ecosystem that hosts substantial agricultural infrastructure and a large human population. We use space-based synthetic aperture radar interferometry (InSAR) to provide synoptic vertical land motion measurements of the Delta and levee system from 1995 to 2000. We find that Delta ground motion reflects seasonal hydrologic signals superimposed on average subsidence trends of 3-20 mm/yr. Because the measurements are insensitive to subsidence associated with peat thickness variations over Delta-island length scales, it is most likely that InSAR rates reflect underlying Quaternary sedimentary column compaction. We combine InSAR rates with sea-level rise scenarios to quantify 21st century levee overtopping potential. If left unmitigated, it is likely that 50 to 100 years from now much of the levee system will subside below design thresholds. |
format |
Article in Journal/Newspaper |
author |
Brooks, Benjamin A Bawden, Gerald Manjunath, Deepak Werner, Charles Knowles, Noah Foster, James Dudas, Joel Cayan, Dan |
author_facet |
Brooks, Benjamin A Bawden, Gerald Manjunath, Deepak Werner, Charles Knowles, Noah Foster, James Dudas, Joel Cayan, Dan |
author_sort |
Brooks, Benjamin A |
title |
Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California |
title_short |
Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California |
title_full |
Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California |
title_fullStr |
Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California |
title_full_unstemmed |
Contemporaneous Subsidence and Levee Overtopping Potential, Sacramento-San Joaquin Delta, California |
title_sort |
contemporaneous subsidence and levee overtopping potential, sacramento-san joaquin delta, california |
publisher |
eScholarship, University of California |
publishDate |
2012 |
url |
https://escholarship.org/uc/item/15g1b9tm |
genre |
Delta Island |
genre_facet |
Delta Island |
op_source |
San Francisco Estuary and Watershed Science, vol 10, iss 1 |
op_relation |
qt15g1b9tm https://escholarship.org/uc/item/15g1b9tm |
op_rights |
CC-BY |
op_rightsnorm |
CC-BY |
_version_ |
1766396501205975040 |