GenCade: Introduction, Background, and Formulation
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1 GenCade: Introduction, Background, and Formulation Ashley Frey Tanya Beck March 7, 2012 CMS Shark River Inlet, NJ CPT Grays Harbor, WA Wood Wood chips Flour Other US Army Corps of Engineers BUILDING STRONG Draft, ft GenCade Matagorda Ship Channel, TX
2 Report Documentation Page Form Approved OMB No Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. 1. REPORT DATE 07 MAR REPORT TYPE 3. DATES COVERED to TITLE AND SUBTITLE GenCade: Introduction, Background, and Formulation 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) U.S. Army Corps of Engineers,U.S. Army Engineer Research and Development Center,3909 Halls Ferry Road,Vicksburg,MS, PERFORMING ORGANIZATION REPORT NUMBER 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR S ACRONYM(S) 12. DISTRIBUTION/AVAILABILITY STATEMENT Approved for public release; distribution unlimited 11. SPONSOR/MONITOR S REPORT NUMBER(S) 13. SUPPLEMENTARY NOTES 13th Annual CIRP Technology-Transfer Workshop, March 6-8, 2012, Philadelphia District. 14. ABSTRACT 15. SUBJECT TERMS 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT a. REPORT unclassified b. ABSTRACT unclassified c. THIS PAGE unclassified Same as Report (SAR) 18. NUMBER OF PAGES 47 19a. NAME OF RESPONSIBLE PERSON Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18
3 Outline What is GenCade? Background, overview, and conceptual coverage GenCade capabilities GenCade limitations and assumptions Workflow Model theory and formulation I/O Files and Cards GenCade interface in SMS Future Development 13 th Annual CIRP Technology-Transfer Workshop, March 7,
4 GENESIS + Cascade GenCade G Cascade (top to bottom) Planning tool (RSM Support) Time scales: months to centuries Multiple inlets, shoals, and barrier islands; cumulative impacts; retains curvature of regional geomorphology Fast Typical grid resolution ~ 500 m Cross-shore processes in future GENESIS (bottom to top) Engineering design tool Can represent all engineering details structures, etc. Mature technology big payback by updating Typical grid resolution ~ 25 m Strategy: Add Cascade capabilities to GENESIS to automatically include all GENESIS features 13 th Annual CIRP Technology-Transfer Workshop, March 7,
5 GENESIS + Cascade GenCade G Integrate from planning through engineering design Cover time scales from days to centuries Preserve regional trends Furnish regionally consistent boundary conditions to local projects Represent cumulative local projects interacting regionally Represent inlet bypassing and tidal delta evolution Resolve engineered elements Include variable grid resolution for accuracy and efficiency Improve computational efficiency (over GENESIS) Strategy: Add Cascade capabilities to GENESIS to automatically include all GENESIS features 13 th Annual CIRP Technology-Transfer Workshop, March 7,
6 Gencade Conceptual Processes: Coastal Sediment Dynamics Moriches Bay Ebb shoal Flood shoal D 50 = 0.27 (W) 0.38 (E) Dune erosion Coastal Structures: Impoundment Bypassing ~150,000 m 3 /yr Wind-blown sand Atlantic Ocean Overwash 13 th Annual CIRP Technology-Transfer Workshop, March 7,
7 GenCade Applicability Regional processes, Long-term morphology change Project Planning & Design Habitat Change Regional Sediment Management Beach fills Inlet bypassing Channel maintenance Unifying technology for multiple projects Intuitive interface (SMS) Storm erosion hazard management Dune erosion, overwash, & breach susceptibility; coastal response to SLR Habitat evolution (Piping Plover; vegetation) 13 th Annual CIRP Technology-Transfer Workshop, March 7,
8 Model Functionality and Capabilities Variable resolution grids Inlet bypassing Inlet Reservoir Model for calculation of shoal and inlet feature sediment balance Representation of regional morphologic trends Multiple wave input forcing locations Representation of coastal structures: groins, jetties, seawalls, t-head groins, breakwaters, etc. Calculation of salients and tombolos behind breakwaters Time-dependent detached breakwater transmission Efficient calculation of breaking wave properties in internal wave model 13 th Annual CIRP Technology-Transfer Workshop, March 7,
9 GenCade Assumptions Beach profile maintains a constant average shape Longshore transport occurs only between top of berm and depth of closure (or active transport) Sand transported alongshore by breaking waves is not affected by nearshore current patterns There is a long-term trend in shoreline evolution 13 th Annual CIRP Technology-Transfer Workshop, March 7,
10 General Workflow Coastal Problem Formulate question Identify constraints Develop criteria to review and evaluate the solutions Assemble and analyze relevant input data Develop engineering solutions and alternatives Develop and execute GenCade to optimize project solutions and alternatives Calibrate, Validate, Evaluate Alternatives Monitor and evaluate results 13 th Annual CIRP Technology-Transfer Workshop, March 7,
11 GenCade Workflow Compile project data Assimilate data as GenCade forcing or BC input Develop conceptual model from input data Develop GenCade project grid and alternatives Execute calibration simulations/sensitivity tests Review and analyze calibration results Refine setups Execute production simulations Review results Analyze and post-process results 13 th Annual CIRP Technology-Transfer Workshop, March 7,
12 Inputs: Survey data Waves Structure information Inlet information Beach Fill Dredging Develop initial shoreline Develop regional contour Assign wave inputs Pre-process inputs GenCade grid regular/irregular Supply input control parameters Structures or coastal projects Inlets, shoals, dredging events Simulation outputs: GenCade solution files Beach fill events 13 th Annual CIRP Technology-Transfer Workshop, March 7,
13 Inputs: GenCade Solution files; Measured Data Transport rates Sediment budgets Shoreline Change Post-process Inlet bypass/shoal evolution Compare measured Post-process outputs: Calculations, figures, images, exported data Compare alternatives 13 th Annual CIRP Technology-Transfer Workshop, March 7,
14 Longshore Net Volume Change: Cross-shore Net Volume Change: Total Volume Change: as dt 0: y t dv + D Model Formulation = B dxdy 1 + D C dq = dt dqdt Q x dxdt Q x ( D + D ) = dxdt qdxdt Q x B C + q = 0 13 th Annual CIRP Technology-Transfer Workshop, March 7,
15 Model Formulation Sediment transport rate Q (m 3 /s): ( 2 ) Hb Q= HCg a1sin 2αbs a2 cosα b bs x Where, H = wave height (m) x C g =wave group speed (m/s) α bs = angle of the breaking a a = K 1 1 5/2 16( ρs / ρ 1)(1 p)1.416 = 2 2 5/2 8( ρs / ρ 1)(1 p) tan β K D D Typically, value of K 2 is: 0.5K 1 < K 2 < 1.5K 1 D B D C Where, K 1 = Primary empirical transport coefficient (controls magnitude of longshore transport rate) K 2 = Secondary empirical transport coefficient (controls distribution of sand within an area; esp. where large wave height gradients, e.g. salients) tanβ = average bottom slope y 13 th Annual CIRP Technology-Transfer Workshop, March 7,
16 Inlet Reservoir Model Inlet bypassing and evolution of inlet deltas V e, V eq Ebb Shoal Q eb Ocean Q in Q ie Q ic Q fe Q ce Attach. Bar Q ba Q out Up-Drift Barrier Is. Channel Down-Drift Barrier Is. Bay Q cf V f, V fq Flood Shoal 13 th Annual CIRP Technology-Transfer Workshop, March 7,
17 Output File Format for GenCade Instantaneous Net Transport at Output Time (*.qtr) File Column 1 Date (yyyymmdd) Column 2 through Column NX Net sediment transport (length 3 /year) for each grid cell Mean Net Transport Over Simulation or Specified Time (*.mqn) File Column 1 Date (yyyymmdd) Column 2 through Column NX Net sediment transport (length 3 /year) for each grid cell averaged over entire simulation (and optionally from start to specified times) Mean Left Transport Over Simulation or Specified Time (*.mql) File Column 1 Date (yyyymmdd) Column 2 through Column NX sediment transport (length 3 /year) to left for each grid cell averaged over entire simulation (and optionally from start to specified times) Mean Right Transport Over Simulation or Specified Time (*.mqr) File Column 1 Date (yyyymmdd) Column 2 through Column NX sediment transport (length 3 /year) to right for each grid cell averaged over entire simulation (and optionally from start to specified times) 13 th Annual CIRP Technology-Transfer Workshop, March 7,
18 Output File Format for GenCade Shoreline Position at Output Time (*.slo) File Column 1 Date (yyyymmdd) Column 2 through Column NX Y-position of shoreline (length unit) for each grid cell Calculated Offshore Contour at Output Time (*.off) File Column 1 Date (yyyymmdd) Column 2 through Column NX Inlet Shoal Volume Output (*.irv) File (one file for each inlet) Column 1 Column 2 Through Column 16 Column 17 Time-step at which shoal Shoal volume (length 3 ) or in /.out volume at each shoal output timestep Date (yyyymmdd) volumes are printed as output for the morphological shoal features identified in the figure below Ocean Bay Q in Up-Drift Barrier Is. Q ie Q ic Q fe Y-position of offshore contour applied to wave transformation (length unit) for each grid cell V e, V eq Ebb Shoal Flood Shoal 13 th Annual CIRP Technology-Transfer Workshop, March 7, Channel Q ce Q cf Q eb Attach. Bar Q ba Down-Drift Barrier Is. Q out
19 GenCade Input Cards TITLE Title of simulation run INIFILE Path and name of initial shoreline file REGFILE Path and name of regional shoreline file NUMWAVES Number of wave input locations/files WAVEID Cell ID; Depth; number of wave events; and file path/name of wave input data (1 WAVEID line/file) PRFILE Path and name of printed output file GENUNITS (ft) or (m) System of units for model I/O X0 X-origin Y0 Y-origin AZIMUTH Angle (deg) of grid rotation about origin NX Number of alongshore cells DX Cell resolution or -1 indicates variable resolution SIMDATS YYYYMMDD Start date of simulation SIMDATE YYYYMMDD Ending date of simulation DT 5.0 Time step in hours DTSAVE 10.0 Data (shoreline/transport ) output times K1 0.5 Longshore sediment transport coefficient 1 K Longshore sediment transport coefficient 2 PRTOUT Output to PRFILE yes (t), no (f) PRWARN Print warnings yes (t), no(f) PRDATE Dates to save simulated shoreline ISMOOTH 11 #cells in offshore contour smoothing IREG Include regional contour (1 = yes; 0 = no) HAMP 1.0 Height amplification factor THETAAMP 1.0 Angle amplification factor THETADEL 0.0 Angle offset LMOVY 0.0 Leftward shoreline displacement velocity D Grain size diameter in millimeters BERMHT 2 Average berm height DCLOS 8 Depth of closure LBCTYPE 0 Left boundary condition type LMOVY 0.0 Leftward shoreline displacement velocity LMOVPER 1 Simulation period (0), day(1), time step (2) period for LMOVY LGROINY 0.0 Length of left groin from shoreline to seaward tip RBCTYPE 0 Right boundary condition type RMOVY 0.0 Rightward shoreline displacement velocity RMOVPER 1 Simulation period (0), day(1), time step (2) period for RMOVY RGROINY 0.0 Length of right groin from shoreline to seaward tip 13 th Annual CIRP Technology-Transfer Workshop, March 7,
20 GenCade Variable Grid Alongshore Detached Breakwater 3-month simulation 250 m offshore 100 m long H = 1 m, T = 5 sec, θ = -5 deg. N = 200 DX = 10 m N = 40 DX max = 100 m DX min = 10 m 13 th Annual CIRP Technology-Transfer Workshop, March 7,
21 GenCade Transmissive Breakwater Detached Breakwater 12-month simulation 60 m offshore 100 m long H = 1 m, T = 5 sec, θ = -5 deg. N = 200 DX = 10 m Shoreline Location (m) K t Distance Alongshore (m) 13 th Annual CIRP Technology-Transfer Workshop, March 7,
22 Example -- Variable Wave Transmission 30 Crest = -2 m MSL 100 Crest = +6 m MSL Shoreline Change (m) Constant K t Variable K t Shoreline Change (m) Constant K t Variable K t Distance Alongshore (m) 100 Crest = +1 m MSL Distance Alongshore (m) Shoreline Change (m) Constant K t Variable K t Distance Alongshore (m) 13 th Annual CIRP Technology-Transfer Workshop, March 7,
23 Example Necessity for Regional Contour No regional contour With Regional Contour 13 th Annual CIRP Technology-Transfer Workshop, March 7,
24 Example Convex Coast No regional contour With regional contour 13 th Annual CIRP Technology-Transfer Workshop, March 7,
25 Example Jetties on Concave Coast No regional contour With regional contour 13 th Annual CIRP Technology-Transfer Workshop, March 7,
26 GenCade in the SMS Interface Surface-water Modeling System Intuitive interface for project: conception completion Data entry, cleaning, and archiving GenCade grid and input development: baseline and alternatives GenCade simulations: baseline and alternatives Post-processing, analysis, and figure generation World coordinates everything georeferenced Datum reprojection and transformation Georeferenced aerial photograph support Improved graphics Potential to connect to other USACE numerical models in the SMS 13 th Annual CIRP Technology-Transfer Workshop, March 7,
27 GenCade in the SMS (conceptual model) GenCade grid aerial photo (real world coordinates) beach fills inlet regional contour initial shoreline wave gauges 13 th Annual CIRP Technology-Transfer Workshop, March 7,
28 GenCade in the SMS (conceptual model) GenCade grid beach fills inlet regional contour initial shoreline wave gauges 13 th Annual CIRP Technology-Transfer Workshop, March 7,
29 GenCade in the SMS (conceptual model) GenCade grid beach fills inlet regional contour initial shoreline wave gauges 13 th Annual CIRP Technology-Transfer Workshop, March 7,
30 GenCade in the SMS GenCade grid wave gauge beach fill regional contour initial shoreline inlet and jetty bypassing bars 13 th Annual CIRP Technology-Transfer Workshop, March 7,
31 GenCade in the SMS Edit Wave Data.. Frlter Wa"e Data Edit Breakwaters... Edit Seawalls... Edit Groins El Edit Inlets ;:::Il GenCade Grid EJ 0 Images Edit Beach Fills... 0 N 18 30_2000, E_di_t _BY_P_a_ss_in_g_.._ --- l~odel Control... Run GenCade... Model Setup I Beach Setup I Seaward BC Lateral BC ] Left Lateral BC , Type: I Pinned 3 Length I Gated Shoreli'J MovlnQ ip: II ft Right Lateral BC , Type: I Pinned 3 Length of Groin from Shoreline to Seaward Tip: 0 It Shoreline Displacement Velocity: Shoreline Displacement Velocity: ft per G ft per 13 th Annual CIRP Technology-Transfer Workshop, March 7,
32 GenCade in the SMS El ~~~ Map Data ~((9 1997_initial 0((9 regional 0((9 Me1ge cove1age El ~ ((9 del ault cover age GenCade Data EJ ~ti:il GenCade G1id lruj Shoreline Change lruj Rate of Change lruj S h01eline El ~ Images ~~ N-18-30_2000 Time steps: 6/9/ /2004 6/30/ /2004 7/14/2004 7/21/2004 7/28/2004 8/4/2004 8/11/ /2004 /25/ th Annual CIRP Technology-Transfer Workshop, March 7,
33 GenCade in the SMS!:! SMS 11.1 File Edit ~~~ Development Display Feature Objects Web Window Help y: B Ji!1 ~ Plot 3 " Map Data 0'(9 1997_ initial 0'(9 regional 0 '(9 M erge coverage 0 '(9 default coverage B ~[QJ~ ~ Shoreline Shoreline 200 Ch~uge. Time Step: 11/13/2003 GenCade Data B ll:tli GenCade Grid 100 fml Shoreline Change fml Rate of Change fml Shoreline B OEiiJ Annotation Data 0!9 layer 111 EJ 0 0 Images 0 N-18 30_2000 :..: A1lf & D Distance Time steps: 3/17/2004 3/24/2004 4/7/2004 4/14/2004 4/28/2004 5/12/2004 5/28/2004 6/2/ /2004 6/16/2004 6/23/2004 6/30/2004 7/7/2004 7/14/2004 7/21/ /4/2004 8/11/2004 8/18/2004 II 13th Annual CIRP Technology-Transfer Workshop, March 7,
34 GenCade in the SMS SMS 11.1 Development File B Edit Display Feature Objects Web Window Help l~ Map Data Tune Series ~0 19B7_in<ial 00 regional 00 lolerge cove rage 00 default coverage El El B - t;;d GenCade Data ittil GenCade Grid Oi:l!J Annotation Data 0!9 layer 111 ~ Images ~ N 18 30_ th Annual CIRP Technology-Transfer Workshop, March 7,
35 GenCade Application Onslow Bay, NC North Carolina Secondary Grid 3 wave gauges 2 inlets (Beaufort to Bogue) Primary Grid 4 wave gauges 7 inlets (Bogue to Mason) Secondary Grid 2 wave gauges 4 inlets (Rich to Carolina Beach) 13 th Annual CIRP Technology-Transfer Workshop, March 7,
36 GenCade Application Onslow Bay, NC ;: ~ 200 Q) C') c «J 100 J: u 0 Q) c :.: Q) "- 0 C1) J: -200 tj) c C1) ::I C') 0 al I Shoreline Change Measured Change - Calculated Change c - t::: 0 -::I «S C1) al I I I I I I I I I I I I 5 0 Distance West of Cape Lookout, mile 13 th Annual CIRP Technology-Transfer Workshop, March 7,
37 GenCade Application Onslow Bay, NC Measured Change Calculated Change 13 th Annual CIRP Technology-Transfer Workshop, March 7,
38 GenCade Application Onslow Bay, NC Shoreline Change <1,) c: -<1,) c: II II Q) C'l 100 c: ~..c: u 0 Q) c: ~ c: (/) II II II II II II II II II II II II II II.- II II Distance West of Cape Lookout, mile - Measured Change - Calculated Change th Annual CIRP Technology-Transfer Workshop, March 7,
39 GenCade Application Matagorda, TX Estimated shoreline change south of south jetty on Matagorda Peninsula for three beach placement scenarios after 10, 25, and 50 years 13 th Annual CIRP Technology-Transfer Workshop, March 7,
40 GenCade Application Matagorda, TX Maximum recession after 25 years was about 200 ft for the existing scenario, 120 ft for the 2.65 Mcy placement, 80 ft for the 4 Mcy placement, and 50 ft for the 5.3 Mcy placement Alt 1: Existing Present Shoreline Calculated Shoreline + 25 Years Alt 4: 5.3 Mcy Placement Present Shoreline Calculated Shoreline + 25 Years Beach Place, 5.3 Mcy 13 th Annual CIRP Technology-Transfer Workshop, March 7,
41 GenCade Application Point Lookout, NY Study Area 13 th Annual CIRP Technology-Transfer Workshop, March 7,
42 GenCade Application at Point Lookout, NY 1994 Shoreline Comparison 1994 Shoreline Regional Contour IRM & Jetties Groins Seawall Wave Gauge Modeled Shoreline 13 th Annual CIRP Technology-Transfer Workshop, March 7,
43 GenCade Application at Point Lookout, NY Modeling Results Existing Condition -No Action Existing Condition -Reoccurring Nourishment 13 th Annual CIRP Technology-Transfer Workshop, March 7,
44 Longshore processes only vs. longshore with cross-shore processes GenCade Development Available in 2012 Measured and calculated shoreline change and analysis of reduced groin length Overwash Dune erosion Wind-blown sand Groin field, Westhampton, NY 13 th Annual CIRP Technology-Transfer Workshop, March 7,
45 Fire Island Inlet 1941 GenCade Development Jetty Atlantic Ocean from Kraus & Seabergh Spit Growth in GenCade 13 th Annual CIRP Technology-Transfer Workshop, March 7,
46 GenCade Development 1941 Jetty Inlet and Barrier Migration 13th Annual CIRP Technology-Transfer Workshop, March 7,
47 GenCade Development Overwash Representation Channel Evolution q bar MSL q bar Subaqueous cross-shore response 13 th Annual CIRP Technology-Transfer Workshop, March 7,
48 Ashley Frey Tanya Beck th Annual CIRP Technology-Transfer Workshop, March 7,
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