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Extratropical Storm-Induced Coastal Inundation: Scituate, MA Robert C. Beardsley 1, Changsheng Chen 2, Qichun Xu 2, Jianhua Qi 2, Huichan Lin 2 2 School.

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Presentation on theme: "Extratropical Storm-Induced Coastal Inundation: Scituate, MA Robert C. Beardsley 1, Changsheng Chen 2, Qichun Xu 2, Jianhua Qi 2, Huichan Lin 2 2 School."— Presentation transcript:

1 Extratropical Storm-Induced Coastal Inundation: Scituate, MA Robert C. Beardsley 1, Changsheng Chen 2, Qichun Xu 2, Jianhua Qi 2, Huichan Lin 2 2 School for Marine Science and Technology University of Massachusetts-Dartmouth New Bedford, MA 02744 1 Department of Physical Oceanography Woods Hole Oceanographic Institution Woods Hole, MA 02543 E-mail: rbeardsley@whoi.edu; c1chen@umassd.edu; qxu@umassd.edu; jqi@umassd.edu; hlin@umassd.edu

2 Overall Goal Investigate roles of model structure and physics, waves, wave-surge interaction, grid resolution, computational effort on hindcasting inundation on a local scale driven by an extratropical storm in the Gulf of Maine. Objectives Hindcast inundation at Scituate (MA) during two recent (2005 and 2007) Nor’easters using suite of models with the same grid and forcing; Compare model output with available field data; Inter-compare model output; Formulate initial comparison results and plans for additional model tests.

3 Scituate, MAThe Test Site: 44013

4 A 3-D View of the bathymetry of the Scituate

5 Initial Test Storm Cases 1)May 24 2005 storm; 2)April 17, 2007 (“Patriot’s Day”) storm; 3)Model validation for tides: May 1-June 1, 2010 Boston tide gauge and NOAA 440013 Nor’easter

6 Nested The Scituate Grid The Northeast Coastal Ocean Forecast System (NECOFS) grid Horizontal Resolution: 10 m to 1 km Cell number: 11153 Node number: 5620

7

8 Tide gauge station

9 Buoys with wave measurements Station No. Longitude(W) Latitude (N) 44004 70.433 38.484 44005 69.140 43.189 44007 70.144 43.531 44008 69.431 40.500 44009 74.702 38.464 44013 70.691 42.354 44017 72.046 40.691 44018 69.294 41.259 44024 65.927 42.312 44025 73.166 40.250 44027 67.314 44.273 44029 70.570 42.520 44030 70.418 43.183 44031 70.060 43.570 44032 69.358 43.715 44033 69.000 44.060 44034 68.110 44.110 44035 67.020 44.890 44037 67.883 43.484 44038 66.550 43.633 Total 20 stations

10 Transects -Elevation -Mass Flux -Wave Energy Flux (?) Model-Model Comparisons Model-Data Comparison Points -Tide gauge -E. Foster Bridge -Harbor Master/Town Pier -Cedar Point depression -Jericho Road -Center of harbor mouth transect 44 Rebecca Road

11 STATIONS NODE NUMBER LONGITUDE LATITUDE A 3078-70.723365842.2058182 B5301-70.723999042.2021598 C5446-70.724861142.1981239 D4216-70.721405042.1923218 E2543-70.717208942.1955299 F5140-70.719886842.1993752 G3484-70.716301042.2028236 H2792-70.718231242.2070961 I1898-70.717887942.2078705 SECTIONS FROM NODE NUMBER LONGITUDE LATITUDE TO NODE NUMBER LONGITUDE LATITUDE Section A 2410 -70.7221832 42.2072754 4133 -70.7191620 42.2062111 Section B 3646 -70.716316242.2017404 2149 -70.7152786 42.2042465 Section C 3401 -70.7259140 42.1923523 3576 -70.7204742 42.1923676 Points and sections in the grid A B C D E F G H IA1 A2 C1 C2 B2 B1 Sites and sections in the model grid

12 The Model Forcing and Boundaries for 2005 and 2007 /data/ftp/upload/Inundation/umass/fvcom_extratropical/2005_fine_grid1/wave_current/input/ /data/ftp/upload/Inundation/umass/fvcom_extratropical/2007_fine_grid1/wave_current/input/ The grid, forcing, boundary conditions, and initial conditions are uploaded at 2005 storm: 2007 storm: Grid: sci_cor.dat --------The latitude at each node: used for Coriolis term sci_dep.dat ------- The water depth at each node sci_grd.dat --------The model mesh sci_obc.dat -------- Node numbers and types at the nesting boundary sci_sigma11.dat --------Vertical coordinate levels and type sci_spg.dat --------Sponge layer setup at the boundary (not need here) sci_restart_wd.dat --------Restart file with types of nodes and cells for the wet and dry

13 Input files for 2005 and 2007 1)Wind forcing (9×9 km WRF hindcast field-the wind velocity at the 10-m height ) 2)Heat flux and precipitation via evaporation (9×9 km WRF hindcast field) 3)The sea level at the nodes of the nesting boundary (5 tidal constituents: M2, N2, S2, K1 and O1 and subtidal sea level) 4)Velocity at the centers of cells Forcings: node_nest.nc ---------------------------------------Open boundary nesting file restart20050501.nc ------------------------------- Restart file for May 01 2005 model run wrf_for.nc or gom_mm5_forcing_20050501-20050601.nc --- Winds, heat flux and P-E 2005 node_nest.nc ------------------------------------ Open boundary nesting file restart20070401.nc ---------------------------- Restart file for April 01 2007 model run wrf_for.nc ----------------------------------------- Winds, Heat Flux and P-E 2007

14 The FVCOM Validation for Tidal Simulation Tide Freq Amp (m) Amp error (m) Phase ( o G) Phase error ( o G) M2 0.0805114 1.2729 0.021 339.21 0.97 N2 0.0789992 0.2858 0.022 43.60 4.79 S2 0.0833333 0.1669 0.018 154.03 8.13 K1 0.0417807 0.1254 0.004 183.54 2.02 O1 0.0387307 0.0988 0.004 76.93 2.46

15 The 2005 Nor’easter Storm Currents Currents-Waves May 25, 05 AM (GMT)

16 Site H Winds Sea Level Vertically averaged velocity

17 Site A (western coast) Winds Sea Level Vertically averaged velocity

18 Winds Sea Level Vertically averaged velocity Site B (western coast)

19 Winds Sea Level Vertically averaged velocity Site C (southwestern coast)

20 Site D (southern are near the bridge) Winds Sea Level Vertically averaged velocity

21 Winds Sea Level Vertically averaged velocity Site F (eastern coast)

22 Site G (entrance) Winds Sea Level Vertically averaged velocity

23 The water transports on Sections A, B and C

24 Play the Google’s based animation for the 2005 storm

25 CurrentsCurrents-Waves 2007 Nor’easter Storm April 18, 04 AM (GMT)

26 Site H (flooded area) Winds Sea Level Vertically averaged velocity

27 Winds Sea Level Vertically averaged velocity Site A (eastern coast)

28 Winds Sea Level Vertically averaged velocity Site B (eastern coast)

29 Winds Sea Level Vertically averaged velocity Site C (southeastern coast)

30 Winds Sea Level Vertically averaged velocity Site D (southern area closed to bridge)

31 Winds Sea Level Vertically averaged velocity Site F (eastern coast)

32 Winds Sea Level Vertically averaged velocity Site G (entrance)

33 The water transports on Sections A, B and C

34 Play the Google’s based animation for the 2007 storm

35 Preliminary Results for the December 27 2010 Storm 7 EST Dec. 267 EST Dec. 277 EST Dec. 28

36 (M2, N2, S2, K1, and O1)

37 Tide Freq Amp (m) Amp error (m) Phase ( o G) Phase error ( o G) M2 0.0805114 1.2702 0.021 340.03 0.90 N2 0.0789992 0.3009 0.021 308.67 4.28 S2 0.0833333 0.1982 0.022 12.31 5.54 H1 0.0803973 0.1840 0.020 56.99 6.70 H2 0.0806255 0.1780 0.021 248.07 6.78 K1 0.0417807 0.1389 0.004 137.64 1.59 O1 0.0387307 0.1129 0.004 124.89 2.21 P1 0.0415526 0.0424 0.005 132.99 5.83 M4 0.1610228 0.0160 0.002 108.91 5.74 9 Tidal Constituents (two year records)

38 2010 December 27 08 GMT

39 Play the Google’s based animation for the 2010 storm

40 Questions raised from the 2010 Nor’easter storm simulation : 1.How could we improve the tidal simulation for the long-term variation of the sea level? 2.How could we count the effects of the snow? 3.Should we increase the time interval of the wind forcing from one hour to a shorter period?

41 The Surface Wave Validations for 2005, 2007 and 2010 Storms

42 20052007 Buoy 44013

43 20052007 Buoy 44029

44 2010 December Wave Forecast Buoy 44005Buoy 44018

45 Buoy 44013

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