University:
Boston University
Course:
CAS EE 100 | Environmental Change and Sustainability
Academic year:

2023
Views:

298

Pages:

22
Author:

Arely Drake

Impacts of Current-‐Wave Interac8ons on Hurricane-‐ and Extratropic Storm-‐induced Surges and Coastal Inunda8ons Example 1: IOOS/SURA Extratropical Storm Inundation Testbed: Preliminary Results for Scituate, Massachusetts. Example 2: 1991 Hurricane Bob-induced storm surges over the New England Shelf. 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. Three Unstructured Grid Models • • • ADCIRC/un-SWAN- The Advanced CIRCulation Model FVCOM/SWAVE-The Finite Volume Community Ocean Model SELFE/WWM-The Semi-implicit Eulerian-Lagrangian Finite Element Model The Test Site: Scituate, MA Tide gauge staQon 44029 44013 Model-‐Model Comparisons • • • Tides and surface Waves The model runs without inclusion of current-‐wave interacQon The model runs with inclusion of current-‐ wave interacQon Transects StaQons Initial Test Storm Cases 1) May 24 2005 storm; 2) April 17, 2007 (“Patriot’s Day”) storm. Boston tide gauge and NOAA 440013 Nor’Easter Surface Wave Simula8on in the region domain 2005 Buoy 44013 Buoy 44029 2007 Buoy 44013 Buoy 44029 Tidal Comparisons at Tidal Gauge Sta8on C Table 1.1 Scituate tide amplitude comparison (5/1/2010 to 5/31/2010) OBS (m) M2 N2 S2 O1 K1 1.324 0.249 0.166 0.119 0.136 ADCIRC (m) 1.237 0.281 0.190 0.109 0.128 Diff (m) -0.087 0.032 0.024 -0.010 -0.008 FVCOM (m) 1.238 0.280 0.190 0.110 0.128 Diff (m) -0.086 0.031 0.024 -0.009 -0.008 SELFE (m) 1.239 0.280 0.190 0.109 0.128 Diff (m) -0.085 0.031 0.024 -0.010 -0.008 2005 Storm Inundation: No waves With waves 2007 Storm Inundation: No waves With waves 2005 extra-‐tropic storm simula8on without inclusion of waves (05:00 GMT, May 25, 2005) ADCIRC FVCOM SELFE 2005 extra-‐tropic storm simula8on with wave-‐current interac8ons (05:00 GMT, May 25, 2005) ADCIRC FVCOM SELFE 2007 extra-‐tropic storm simula8on without inclusion of waves (04:00 GMT, April 18, 2007) ADCIRC FVCOM SELFE 2007 extra-‐tropic storm simula8on with current-‐wave interac8ons (04:00 GMT, April 18, 2007) ADCIRC FVCOM SELFE No waves With waves 2005 Nor’Easter Storm No waves With waves 2007 Nor’Easter Storm 2005 Nor’Easter Storm Waves only Waves-‐currents 2007 Nor’Easter Storm Waves only Waves-‐currents Waves only Waves-‐Currents Signiﬁcant Wave Heights 2005 Nor’Easter Storm ADCIRC FVCOM SELFE Waves only Waves-‐Currents Signiﬁcant Wave Heights 2007 Nor’Easter Storm ADCIRC FVCOM SELFE Summary • For given same forcing condiQons, all three unstructured grid models are capable of reproducing the Qdes in Scituate, MA; • All three models produced the same accuracy of the sea surface elevaQon and the same pagerns of currents over the shelf outside Scituate. • The disQnct diﬀerences of model results are in the current spaQal distribuQon and coastal inundaQon inside Scituate, parQcularly in the case with current-‐wave interacQons.

Impacts of Current-Wave Interactions on Hurricane

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