Menemsha Pond System ModelingBy Mitchell Buck

ModelRMA-2 – hydrodynamic numerical model

Developed by William Norton and Ian King for the USACE Integrated with Surface-Water Modeling System (SMS)

version 10.1 Simulates 2D depth-averaged hydrodynamics using

simplified Navier-Stokes Equations

Model InputBathymetry

USACE NAE 2013 LIDAR dataUSACE NAE 2013 Bathymetric SurveyGEODAS Bathymetric Survey #H11920Woods Hole Group 2001 Survey

Boundary Condition – Woods Hole Group 2001 Tide survey

Model Grid – 2001 Model grid with updates

New versus old bathy2001 2013

2001 to 2013 Difference

Updated Model Grid

Proposed Dredged Channel

ResultsParameter Existing Dredged Difference

Max Min Max Min Max Min

WSE (m) 1.01 -0.43 1.01 -0.43 -0.08 0.08

Velocity (m/s) 1.25 - 1.19 - -0.55 0.48

Residence Time (Days) 1.46 - 1.40 - -0.06 -

Tidal Prism (m^3) 2,517,800 - 2,630,006 - 112,206 (+4.4%) -