Abstract
Sediment (mud and sand) from man-made diversions of the Mississippi River, dredging effluent, and other sources is being used to conserve and create land to protect the Gulf Coast. The long-Term settlement prediction of these newly deposited sediments is necessary to ensure the confined dredged disposal areas, coastal restoration, and marsh creation projects protect people and their property, wetlands, and various infrastructure over the design/service life. Long-Term settlement predictions are usually made with the software Primary Consolidation, Secondary Compression, and Desiccation of Dredged Fill (PSDDF). PSDDF is a 1D nonlinear numerical model that accounts for settlement due to self-weight and surcharge induced consolidation, secondary compression, and desiccation. This paper uses a hypothetical case study to estimate the dredged fill height necessary to maintain a surface elevation of 1.5 ft for the next 20 years. Because there is uncertainty in the hydraulic conductivity and compressibility relationships, a reliability analysis is performed to quantify the effect on long-Term settlement predictions. The uncertainty analysis indicates that the void ratio-effective stress and void ratio-permeability relationships influence the surface settlement more than the other input parameters for the dredged sediment.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 492-500 |
| Number of pages | 9 |
| Journal | Geotechnical Special Publication |
| Volume | 2016-January |
| Issue number | 273 GSP |
| DOIs | |
| State | Published - Jan 1 2016 |
| Event | 5th Geo-Chicago Conference: Sustainable Waste Management and Remediation, Geo-Chicago 2016 - Chicago, United States Duration: Aug 14 2016 → Aug 18 2016 |
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ASJC Scopus subject areas
- Civil and Structural Engineering
- Architecture
- Building and Construction
- Geotechnical Engineering and Engineering Geology
Cite this
Uncertainty of Model Parameters in PSDDF for Coastal Restoration. / Stark, Timothy D.; Jafari, Navid H.
In: Geotechnical Special Publication, Vol. 2016-January, No. 273 GSP, 01.01.2016, p. 492-500.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - Uncertainty of Model Parameters in PSDDF for Coastal Restoration
AU - Stark, Timothy D.
AU - Jafari, Navid H.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Sediment (mud and sand) from man-made diversions of the Mississippi River, dredging effluent, and other sources is being used to conserve and create land to protect the Gulf Coast. The long-Term settlement prediction of these newly deposited sediments is necessary to ensure the confined dredged disposal areas, coastal restoration, and marsh creation projects protect people and their property, wetlands, and various infrastructure over the design/service life. Long-Term settlement predictions are usually made with the software Primary Consolidation, Secondary Compression, and Desiccation of Dredged Fill (PSDDF). PSDDF is a 1D nonlinear numerical model that accounts for settlement due to self-weight and surcharge induced consolidation, secondary compression, and desiccation. This paper uses a hypothetical case study to estimate the dredged fill height necessary to maintain a surface elevation of 1.5 ft for the next 20 years. Because there is uncertainty in the hydraulic conductivity and compressibility relationships, a reliability analysis is performed to quantify the effect on long-Term settlement predictions. The uncertainty analysis indicates that the void ratio-effective stress and void ratio-permeability relationships influence the surface settlement more than the other input parameters for the dredged sediment.
AB - Sediment (mud and sand) from man-made diversions of the Mississippi River, dredging effluent, and other sources is being used to conserve and create land to protect the Gulf Coast. The long-Term settlement prediction of these newly deposited sediments is necessary to ensure the confined dredged disposal areas, coastal restoration, and marsh creation projects protect people and their property, wetlands, and various infrastructure over the design/service life. Long-Term settlement predictions are usually made with the software Primary Consolidation, Secondary Compression, and Desiccation of Dredged Fill (PSDDF). PSDDF is a 1D nonlinear numerical model that accounts for settlement due to self-weight and surcharge induced consolidation, secondary compression, and desiccation. This paper uses a hypothetical case study to estimate the dredged fill height necessary to maintain a surface elevation of 1.5 ft for the next 20 years. Because there is uncertainty in the hydraulic conductivity and compressibility relationships, a reliability analysis is performed to quantify the effect on long-Term settlement predictions. The uncertainty analysis indicates that the void ratio-effective stress and void ratio-permeability relationships influence the surface settlement more than the other input parameters for the dredged sediment.
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UR - http://www.scopus.com/inward/citedby.url?scp=84984972824&partnerID=8YFLogxK
U2 - 10.1061/9780784480168.049
DO - 10.1061/9780784480168.049
M3 - Conference article
AN - SCOPUS:84984972824
VL - 2016-January
SP - 492
EP - 500
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
SN - 0895-0563
IS - 273 GSP
ER -