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dc.contributorUnited States. Army. Corps of Engineers. New England Division.-
dc.contributor.authorLin, Hsin-Chi J.-
dc.contributor.authorRichards, David R.-
dc.descriptionTechnical Report-
dc.descriptionAbstract: The Saugus and Pines Rivers estuary is located along the Atlantic coast approximately 10 miles north of Boston, MA. Because of the topography and hydraulics of the Saugus and Pines river basins, a big storm event creates a significant flooding in the areas along the Saugus and Pines Rivers. A plan was developed by the U.S. Anny Engineer Division, New England, to provide flood damage reduction against the Standard Project Northeaster event. The principal component of this plan is construction of tidal floodgates at the mouth of the Saugus River. The objectives of this study were to use the TABS-MD numerical modeling system to (A.) provide upstream land downstream boundary conditions for testing the proposed floodgate plan in a physical model study; (B.) determine the impacts caused by breaching of the I-95 embankment at the east branch of Pines River and widened Pines River openings in the I-95 embankment; and (C.) evaluate the impacts of floodgate structure on basin tide levels, circulation pattems, and storm surges and sedimentation and the effect of sea level rise on these responses. Since the proposed floodgate area has not experienced sediment problems, the sediment study was focused on a sensitivity analysis of model parameters. A 24-hr simulation was used to indicate any significant change in sediment deposition and scour pattern in the study area. The RMA-2V model was successfully verified to limited field measurements including a 3-day field survey of water levels at nine tide gages and a 14-hr survey of velocity measurements at nine current stations. The comparisons of the computed water levels and velocities to field measurements were good. Breaching of the abandoned I-95 embankment and widening the Pines River opening on I-95 will increase tidal flow in marshy areas. The water levels in marshy areas will increase about 0.5 ft at the peak tide under a spring tide condition. The time lag of the peak water levels between the Broad Sound and upper marshy areas was reduced from 2 hr to 1 hr. The proposed floodgate will not cause significant change of water levels in the Pines and Saugus Rivers under the normal tide conditions. It will protect the study areas from flooding during the storm events. The water levels in the marshy areas under Plan 2C+7 will increase about 1.0 ft at the peak flood tide and ebb tide for the 1-ft rise ill sea level. The proposed floodgate will not alter the sediment deposition or scour pattern in the estuary under the normal tide condition, but local scour near the piers may occur.-
dc.publisherHydraulics Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesTechnical report (U.S. Army Engineer Waterways Experiment Station) ; HL-93-5.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectFinite element method-
dc.subjectFlood control-
dc.subjectMathematical models-
dc.subjectNumerical models-
dc.subjectSaugus River Estuary-
dc.subjectSediment transport-
dc.titleNumerical model investigation of Saugus River and tributaries, Massachusetts, flood damage reduction project-
Appears in Collections:Technical Report

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