Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/20297
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dc.contributor.authorFrey, Ashley E.en_US
dc.contributor.authorMorang, Andrew, 1953-en_US
dc.contributor.authorKing, David B. (David Byron)en_US
dc.creatorRegional Sediment Management Program (U.S.)en_US
dc.creatorCoastal and Hydraulics Laboratory (U.S.)en_US
dc.date.accessioned2016-10-28T21:07:41Zen_US
dc.date.available2016-10-28T21:07:41Zen_US
dc.date.issued2016-07en_US
dc.identifier.govdocERDC/CHL TR-16-13en_US
dc.identifier.urihttp://hdl.handle.net/11681/20297en_US
dc.descriptionTechnical Reporten_US
dc.description.abstractThe Coastal and Hydraulics Laboratory, Engineer Research and Development Center, and the U.S. Army Engineer District, Galveston, conducted a study to support a sand management strategy for the Galveston Park Board of Trustees of Galveston, TX. The long-term management strategy encompasses not only Galveston Park Board of Trustees managed areas, but the entire shoreline of Galveston Island. In the first phase of the project, a sediment budget was recomputed and GenCade, a numerical model, was calibrated for Galveston Island. After discussing potential solutions and actions with the Park Board, engineering analyses and numerical modeling were conducted to quantify the performance of each selected alternative. The long-term solution is a wide beach along Galveston Island that is filled through beach nourishment and backpassing plants on both ends of the island. This solution will require a large volume of sand for the initial construction; therefore, sand management solutions were identified and potential offshore sand sources were identified. Shorter-term and smaller-scale beach nourishment activities were also provided as options within the strategy.en_US
dc.description.sponsorshipRegional Sediment Management Program (U.S.)en_US
dc.description.sponsorshipPrepared for Regional Sediment Management Program, U.S. Army Corps of Engineers, Washington, DC 20314-1000 under Project 454632, “Galveston Sand Management Strategies”en_US
dc.description.tableofcontentsAbstract .......................................................................................................................................................... ii Figures and Tables........................................................................................................................................vi Preface......................................................................................................................................................... xiii Unit Conversion Factors ............................................................................................................................xiv 1 Introduction............................................................................................................................................1 1.1 Background.................................................................................................................... 1 1.1.1 Geographic setting......................................................................................................... 1 1.1.2 Sediment transport in the study area........................................................................... 3 1.2 Objective ........................................................................................................................ 4 1.3 Approach ........................................................................................................................ 5 1.4 Report organization....................................................................................................... 5 2 Sand Management Alternatives ........................................................................................................6 2.1 Objectives of this sand management study................................................................. 6 2.2 Sand management and placement alternatives ......................................................... 8 2.2.1 Overview ......................................................................................................................... 8 2.2.2 Plan 1. Reach 1 through 5 comprehensive alternative ............................................... 9 2.2.3 Plan 2. Beach fill in limited areas ...............................................................................10 2.2.4 Plan 3. Recycle existing sediment without addition of new material........................11 2.2.5 Plan 4. Continue existing management......................................................................11 2.2.6 Plan 5. No-action plan .................................................................................................11 2.2.7 Fundamental constraints ............................................................................................11 2.3 Sand source and delivery system alternatives ..........................................................12 2.3.1 Offshore dredging ........................................................................................................12 2.3.2 Channel dredging.........................................................................................................13 2.3.3 Truck-haul backpassing...............................................................................................14 2.3.4 Pipeline backpassing ...................................................................................................14 2.3.5 Alternative sources ......................................................................................................15 2.3.6 Combination of sources...............................................................................................15 2.4 Estimated sediment volumes for different combinations of reaches ......................15 2.4.1 Initial fill volumes .........................................................................................................16 2.4.2 Backpassing volume rates ..........................................................................................17 2.4.3 Sediment losses and gains over the project lifetime .................................................17 2.5 Short-term alternatives ...............................................................................................21 2.6 Other possible alternatives .........................................................................................22 2.7 Additional considerations............................................................................................23 2.7.1 Need for phased development of the selected alternative .......................................23 2.7.2 Additional studies.........................................................................................................24 2.7.3 Data collection needs for monitoring..........................................................................24 2.7.4 Funding......................................................................................................................... 24 2.7.5 Additional considerations ............................................................................................26 2.7.6 Basic beach management policy ................................................................................26 2.7.7 Additional information .................................................................................................28 3 Galveston Island Sediment Budget.................................................................................................29 3.1 Background..................................................................................................................29 3.2 Results .........................................................................................................................33 3.2.1 Cell 1_1: Galveston north fillet....................................................................................34 3.2.2 Cell 1_4: Galveston entrance channel........................................................................37 3.2.3 Cell 1_2: Anchorage area ............................................................................................37 3.2.4 Cell 1_3: Inner and outer bar channel........................................................................38 3.2.5 Cell 1_5: East Beach (Park Board Reach 6)...............................................................38 3.2.6 Cell 1_6: Galveston Seawall (Park Board Reaches 1 and 2).....................................40 3.2.7 Cell 1_7 (Park Board Reach 3 and east part of 4).....................................................41 3.2.8 Cell 1_8 (Park Board Reach 4)....................................................................................41 3.2.9 Cell 1_9: West Beach (Park Board Reach 5)..............................................................42 3.2.10 Cell 1_10: San Luis Pass East (Park Board Reach 5)...........................................43 3.2.11 Cell 1_11: San Luis Flood Shoal.............................................................................43 4 GenCade Calibration and Alternatives ...........................................................................................44 4.1 GenCade background..................................................................................................44 4.2 Numerical modeling overview and approach.............................................................45 4.3 Data inputs used in both grids.................................................................................... 47 4.3.1 Initial shoreline position...............................................................................................47 4.3.2 Regional contour..........................................................................................................47 4.3.3 Waves ........................................................................................................................... 47 4.4 Seawall grid domain ....................................................................................................48 4.4.1 Beach fills ..................................................................................................................... 48 4.4.2 Groins............................................................................................................................ 48 4.4.3 Seawall ......................................................................................................................... 48 4.4.4 Lateral boundary conditions........................................................................................49 4.5 West end grid...............................................................................................................49 4.5.1 Beach fills ..................................................................................................................... 49 4.5.2 Lateral boundary conditions........................................................................................49 4.6 Calibration summary ...................................................................................................49 5 East Beach Sand Management Options........................................................................................54 5.1 Significance of Big Reef and East Beach ...................................................................54 5.2 Option 1: East Beach sand sources ...........................................................................57 5.3 Option 2: Deposition basin off East Beach ................................................................59 5.4 Option 3: Reduce transmission through south jetty ..................................................60 5.5 Option 4: Reduce aeolian sand transport..................................................................64 5.5.1 Background .................................................................................................................. 64 5.5.2 Aeolian transport at East Beach–Big Reef.................................................................64 5.5.3 Alternatives................................................................................................................... 69 5.6 Option 5: Sand backpass system ...............................................................................72 6 San Luis Pass Sand Management Options....................................................................................76 6.1 Install groin to reduce west-moving littoral transport................................................77 6.2 Install fixed or mobile backpassing plant...................................................................77 6.3 Dredge an offshore deposition basin.........................................................................78 7 Proposed Large-Scale Beach along Seawall.................................................................................79 7.1 General information ....................................................................................................79 7.2 Full-scale beach fill design..........................................................................................81 8 GenCade Alternatives ........................................................................................................................88 8.1 Structural alternatives in front of seawall ..................................................................93 8.2 Sand tightening the Galveston Entrance Channel jetty.............................................96 8.3 Beach fill alternatives along the seawall.................................................................... 97 8.3.1 Level 1 – Small beach fill in Reach 1 .........................................................................97 8.3.2 Level 2 – Beach fills on Reach 1.................................................................................99 8.3.3 Level 3 – Beach fills on Reach 1 and Reach 2 ........................................................108 8.3.4 Level 4 – Large-scale beach on Reach 1 and Reach 2...........................................114 8.4 Backpassing alternatives along seawall ..................................................................117 8.4.1 Level 1 – Backpassing in front of groin field............................................................118 8.4.2 Level 2 – Backpassing in front of seawall................................................................125 8.5 Beach fills along west end ........................................................................................128 8.5.1 Level 1 – Small beach fills along Galveston Park Board (GPB) property................128 8.5.2 Level 2 – Beach fill along first 1.5 miles of west end..............................................134 8.5.3 Level 3 – Beach fill along Reach 3 ...........................................................................137 8.5.4 Level 4 – Beach fill along Reaches 3 and 4.............................................................143 8.5.5 Level 5 – Large-scale beach fill along Reaches 3 and 4.........................................144 8.6 Backpassing along west end ....................................................................................145 8.6.1 Level 1 – Backpassing...............................................................................................145 8.6.2 Level 2 – Backpassing along Reach 3......................................................................147 8.6.3 Level 3 – Backpassing along Reaches 3 and 4.......................................................150 9 Conclusions.......................................................................................................................................153 9.1 Beach fill ....................................................................................................................153 9.1.1 Sand sources at East Beach, Galveston Island........................................................153 9.1.2 Sand sources at San Luis Pass.................................................................................154 9.2 Recommendations ....................................................................................................154 References ................................................................................................................................................155 Appendix A: Dredging Summary, Galveston Ship Channel..............................................................163 Appendix B: Dredging and Placement Data, Galveston Seawall and Big Reef ..........................166 Appendix C: Data Tabulation for Sediment Budget Cells ................................................................167 Appendix D: Aeolian Transport Methodology..................................................................................... 172 Appendix E: Beach Fill Volumes............................................................................................................181 Report Documentation Pageen_US
dc.format.extent200 pages/21.78 Mben_US
dc.format.mediumPDFen_US
dc.language.isoen_USen_US
dc.publisherEngineer Research and Development Center (U.S.)en_US
dc.relationhttp://acwc.sdp.sirsi.net/client/search/asset/1050767en_US
dc.relation.ispartofseriesTechnical Report (Engineer Research and Development Center (U.S.)); no. ERDC/CHL TR-16-13en_US
dc.rightsApproved for Public Release; Distribution is Unlimiteden_US
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobaten_US
dc.subjectShorelines--Monitoringen_US
dc.subjectBeach nourishmenten_US
dc.subjectSediment transporten_US
dc.subjectSediment controlen_US
dc.subjectSand bypassingen_US
dc.subjectNumerical analysisen_US
dc.subjectGalveston Island (Tex.)en_US
dc.subjectRegional Sediment Management Program (U.S.)en_US
dc.titleGalveston, Island, Texas, sand management strategiesen_US
dc.typeReporten_US
Appears in Collections:Technical Report
Technical Report

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