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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Frey, Ashley E. | en_US |
| dc.contributor.author | King, David B. (David Byron) | en_US |
| dc.contributor.author | Munger, Sophie | en_US |
| dc.creator | Coastal Inlets Research Program (U.S.) | en_US |
| dc.creator | Blue Science Consultants, LLC | en_US |
| dc.creator | Coastal and Hydraulics Laboratory (U.S.) | en_US |
| dc.date.accessioned | 2016-05-06T14:32:03Z | en_US |
| dc.date.available | 2016-05-06T14:32:03Z | en_US |
| dc.date.issued | 2014-08 | en_US |
| dc.identifier.govdoc | ERDC/CHL TR-14-6 | en_US |
| dc.identifier.uri | http://hdl.handle.net/11681/7348 | en_US |
| dc.description | Technical Report | en_US |
| dc.description.abstract | This is the second report in a series describing applications with the new shoreline change and sand transport model, GenCade. It is considered as a companion report to the first report in the GenCade series, Frey et al. (2012a), and provides additional details that were not described in that report. This report describes basic assumptions in GenCade, requirements to run the model, and recommendations about important GenCade capabilities. While all of the basic assumptions are discussed, this report also considers if the assumptions are satisfied and describes a procedure to follow when they are not. All of the required and optional input and output files are explained, and common user errors in model setup, with solutions, are detailed. These user errors may not be evident to new users but are easily corrected. Although the model will run even if the recommendations are not followed, the results may not represent the regional system as well as if properly set up. The recommendations section explains specific capabilities like the regional contour and the Inlet Reservoir Model (IRM) and topics such as project work flow and grid cell spacing. By following these recommendations, the user will produce better results. Finally the path forward for the model and future guidance are discussed. | en_US |
| dc.description.sponsorship | Coastal Inlets Research Program (U.S.) | en_US |
| dc.description.sponsorship | United States. Army. Corps of Engineers | en_US |
| dc.description.tableofcontents | Abstract .......................................................................................................................................................... ii Figures and Tables.........................................................................................................................................v Preface........................................................................................................................................................... ix Unit Conversion Factors ............................................................................................................................. xi List of Symbols and Abbreviations .......................................................................................................... xii 1 Introduction............................................................................................................................................1 1.1 Overview......................................................................................................................... 1 1.2 GenCade development history...................................................................................... 2 1.3 Status of existing GenCade documentation ................................................................ 2 1.4 Purpose of additional documentation.......................................................................... 3 1.5 Report organization....................................................................................................... 4 2 Basic Assumptions ...............................................................................................................................5 2.1 Description of basic assumptions ................................................................................ 5 2.1.1 Assumption 1 ................................................................................................................. 6 2.1.2 Assumption 2 ................................................................................................................. 9 2.1.3 Assumption 3 ............................................................................................................... 11 2.2 Model assumptions at a study site.............................................................................12 2.3 Procedure for cases that violate basic assumptions.................................................14 3 GenCade Requirements.....................................................................................................................16 3.1 Basic requirements to run GenCade ..........................................................................16 3.1.1 Required input files......................................................................................................16 3.1.2 Optional input files .......................................................................................................27 3.1.3 GenCade Model Execution ..........................................................................................29 3.1.4 Output files ................................................................................................................... 31 3.2 Common setup mistakes ............................................................................................33 3.2.1 SMS license problems .................................................................................................33 3.2.2 Failure to properly define each feature ......................................................................34 3.2.3 Mistakes when merging coverages in the conceptual model ...................................38 3.2.4 Improper placement of structures ..............................................................................40 3.2.5 Gated boundary condition mistakes ...........................................................................49 3.2.6 Incorrect input waves...................................................................................................51 3.2.7 Incorrect time-step.......................................................................................................56 3.2.8 Failure to modify model control...................................................................................58 3.2.9 Executable location......................................................................................................62 3.2.10 Path names and placement of input files..............................................................62 3.2.11 Opening *.gen files and *.sms files in the SMS....................................................63 4 Recommendations for GenCade Applications..............................................................................67 4.1 Work flow for a GenCade project................................................................................67 4.1.1 Introduction .................................................................................................................. 67 4.1.2 Project initiation ...........................................................................................................69 4.1.3 Collection of input data................................................................................................70 4.1.4 Model setup.................................................................................................................. 70 4.1.5 Calibration, validation, and sensitivity testing............................................................71 4.1.6 Production runs............................................................................................................73 4.1.7 Analysis and interpretation of results .........................................................................74 4.1.8 Final report ................................................................................................................... 74 4.2 Standards for cell spacing .......................................................................................... 74 4.2.1 Cell spacing for constant resolution ...........................................................................74 4.2.2 Variable cell spacing ....................................................................................................75 4.3 Angle between shoreline and x-axis ...........................................................................87 4.4 Stability parameter......................................................................................................92 4.4.1 Stability parameter error messages............................................................................92 4.4.2 Solutions for stability parameter issues .....................................................................94 4.4.3 Understanding the stability parameter.......................................................................98 4.5 ISMOOTH......................................................................................................................99 4.5.1 Number of cells in the offshore contour smoothing window (ISMOOTH)..................99 4.5.2 Definition of ISMOOTH...............................................................................................100 4.5.3 Determination of optimal ISMOOTH value................................................................100 4.5.4 Other considerations .................................................................................................104 4.6 Regional contour .......................................................................................................104 4.6.1 What is a regional contour?.......................................................................................104 4.6.2 When should a regional contour be used?...............................................................106 4.6.3 How is the shape of a regional contour generated? ................................................108 4.6.4 Example ......................................................................................................................114 4.7 Inlet Reservoir Model ................................................................................................119 4.7.1 Introduction ................................................................................................................119 4.7.2 Analytical model.........................................................................................................121 4.7.3 Initial volumes and equilibrium volumes ..................................................................126 4.7.4 Attachment bars.........................................................................................................129 4.7.5 Bypassing coefficient.................................................................................................132 4.7.6 Example ......................................................................................................................134 5 Summary and Future Guidance.....................................................................................................142 References ................................................................................................................................................144 Report Documentation Page | en_US |
| dc.format.extent | 165 pages/15.61 MB | en_US |
| dc.format.medium | en_US | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Engineer Research and Development Center (U.S.) | en_US |
| dc.relation | http://acwc.sdp.sirsi.net/client/en_US/search/asset/1035963 | en_US |
| dc.relation.ispartofseries | Technical report (Engineer Research and Development Center (U.S.)) ; no.ERDC/CHL TR-14-6 | en_US |
| dc.rights | Approved for public release; distribution is unlimited | en_US |
| dc.source | This Digital Resource was created in Microsoft Word and Adobe Acrobat | en_US |
| dc.subject | GenCade | en_US |
| dc.subject | Work flow | en_US |
| dc.subject | Shoreline change | en_US |
| dc.subject | Inlet reservoir model | en_US |
| dc.subject | Sand transport | en_US |
| dc.subject | Sediment transport | en_US |
| dc.subject | Regional contour | en_US |
| dc.subject | Surface-water Modeling System | en_US |
| dc.subject | Stability parameter | en_US |
| dc.subject | Computer programs | en_US |
| dc.subject | Coastal Inlets Research Program (U.S.) | en_US |
| dc.title | Recommendations and requirements for GenCade simulations | en_US |
| dc.type | Report | en_US |
| Appears in Collections: | Technical Report Technical Report | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ERDC-CHL-TR-14-6.pdf | ERDC/CHL TR-14-6 | 15.61 MB | Adobe PDF |  View/Open |