Help

Use the links below to find assistance using the programs, tools, and data available through this Navigation Portal.

If you don’t find what you’re looking for or want to report an issue, click the Contact icon in the upper-right corner to send us an email. You can also click the Home icon at any point to return to the main Explore Navigation page.


  1. Dredging
    1. Channels
    2. Placement Areas

  2. Navigation
    1. Resource Discovery

  3. Sediment & Ecosystem Management
    1. Sediment Analysis
      1. Volumetric Fraction Calculator
    2. Sediment Mobility

  4. Survery & Mapping
    1. Channel Framework
    2. Hydrographic Surveys

Channels

To view dredging data for USACE-maintained channels, select a District and project. For each fiscal year for which data is available, the following details are displayed:

  • Gross (Log Ops) in cubic yards of dredged material as reported through the logs of operations in CE-Dredge; if a breakdown of dredged material by reach is available, a Details button displays
  • Reported Quantity (in cubic yards) of dredged material as determined by a survey and recorded in the Dredging Information System (DIS)
  • Reported Cost of dredging as recorded in DIS

To filter the contents of the table further, select a fiscal year or type any text in the Search field to search within the Fiscal Year, Gross (Log Ops), Reported Quantity, and Reported Cost columns.
To copy, print, or export to Excel or PDF the contents of either the main or the Details table, click the appropriate button.

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Placement Areas

To view USACE placement area data, select a District/Division and projected fiscal year. For each placement area within the selected District/Division, the following details are displayed:

  • District, Name, Location, Intent, Purpose, Remaining Capacity Date, and Remaining Capacity (in cubic yards)
  • Current FY, Gross (Log Ops) Remaining Capacity, and Reported Remaining Capacity (in cubic yards)
  • Projected FY, Placements, Capacity Remaining w/o Site Mgmt, Site Mgmt, Capacity Remaining w/Site Mgmt, Site Mgmt Cost (in cubic yards or dollars, as appropriate)
Note: To display a breakdown of the Projected Placements data for a specific placement area, click the button to expand the list; click the button to minimize the list again.

To filter the contents of the table further, select a placement area type in the Type drop-down or type any text in the Search field to search within any column.
To reorder the contents of any column alphabetically or numerically, click the up or down arrow to the right of the column name.
To display more or fewer items in the table, select a number from the Show Entries drop-down.
To copy, print, or export to Excel the contents of either the main or the Details table, click the appropriate button.

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Resource Discovery

Use this page to locate specific programs, tools, and data within the Navigation Portal. Type one or more navigation-related terms in the Keywords field and then click the Search icon. To limit your search, select one or more functional areas from the Category drop-down before clicking Search.

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Sediment Analysis

Use one of the following procedures to view sediment data:

  • In the Search Sample Name text box, type all or part of a sample name, press Enter, and then from the drop-down select the appropriate sample name.
  • Click Filter Map, enter or select the appropriate sediment criteria (Date Range, Projects, Sediment Characterization, and/or Layer Control), and then click Apply.

All sediment sampling events matching the name or criteria display on the map. To display the ID of an event, hover over its icon; to display a popup with additional data about the event, click the icon. Many popups also include links to additional data and/or reports. Sediment data is provided by the Sediment Analysis & Geo-App (SAGA) database, which is populated by USACE Districts through Excel data templates available on the USACE Geospatial Platform.

To analyze a sediment sample not available in the SAGA database, from the Calculator Tools drop-down select Volumetric Fraction Calculator or Grain Size Distribution, enter or select the sediment details, and then click Calculate.


Volumetric Fraction Calculator

Enter the in situ and hopper data for the sediment samples taken at various reaches. Percentages of water, coarse, silt, and clay by volume in the dredged material are calculated. These calculated volumetric fractions are used as input for the STFATE model.

  • Column 1, SiteName (Name of Site or Reach)
  • Column 2, PC (Percent Coarse, %)
  • Column 3, PSilt (Percent Silt, %)
  • Column 4, PClay (Percent Clay, %)
  • Column 5, FW (Free Water)
  • Column 6, SGC (Specific Gravity, Coarse)
  • Column 7, SGSilt (Specific Gravity, Silt)
  • Column 8, SGClay (Specific Gravity, Clay)
  • Column 9, DoW (Density of Water, g/cc)
  • Column 10, LL (Liquid Limit, %) - optional
  • Column 11, WC (Water Content, %) – optional*
  • Column 12, SW (S by Weight, %) – optional*
  • Column 13, WD (Wet Density, g/cc or kg/L) – optional*
  • * - one of these three values MUST be reported

1 Data row for each site

  • All values must be numeric, with the exception of Site Name, and reported in the noted units.
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Sediment Mobility

Engineers divide the submerged beach profile into two discrete zones—the active nearshore zone and the inactive offshore zone. The point at which these two zones meet (usually at around a depth of 15') is referred to as the “Depth of Closure” (DoC). Sand in the nearshore or “closure” zone, while active due to the seasons or storms, is unable to move beyond the DoC to the offshore zone, and sand deeper than this point is unable to move to the nearshore zone. This two-zone theory, known as the “river of sand” model, is at the core of modern engineering practice. It is often used in coastal sediment budget estimations, coastal change numeric models, and beach renourishment designs.

The Sediment Mobility Tool (SMT) displays DoC and sediment mobility data for the US coastline. This data may be used to determine whether sediment that is dredged from inlets and channels and placed in the nearshore zone will mobilize and, if so, what the general direction of transport will be. This information, in turn, may help inform decisions about how to use dredged sediment (for example, for beach renourishment or for new placement areas). For more information, click the Contact icon above.

  1. Using your mouse and the + and – buttons, zoom to the appropriate location on the map.
  2. Click the Draw Shoreline Angle button.
  3. Draw the shoreline angle; click to start drawing and indicate each vertex, and then double-click to complete the angle.
  4. Either click Select Placement Site and then click a point on the map or enter the placement site’s latitude and longitude.
  5. Click Find WIS/Calculate Angle.
  6. Adjust the d50, Nearshore Placement Depth, Current 1m above the bed, Temperature, and Salinity settings as necessary.
  7. Click Submit.

The tool uses Snell’s Law to transform WIS hindcast wave data to the nearshore site. The depth of closure, which is a specified depth along a beach profile where net sediment transport is very small or existent, is calculated using several commonly used empirical equations which are described by Brutsché et al. (2016). The frequency of sediment mobility is calculated using both linear and non linear stream-function wave theories using procedures described by McFall et al. (2016). The cross-shore sediment migration is calculated using an empirical relationship described by Larson and Kraus (1992). The wave rose provides the axis of wave dominated transport at the nearshore site.

For information on DoC and sediment mobility, refer to the following documents: "Calculating Depth of Closure Using WIS Hindcast (ERDC/CHL CHETN-VI-45)" and Evaluating Sediment Mobility for Siting Nearshore Berms (ERDC/CHL CHETN-IV-108). For more information, click the Contact icon at the top of the page.

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Channel Framework

The National Channel Framework (NCF), an enterprise GIS geodatabase of USACE-maintained high- and medium-tonnage channels, is the basis for the National Oceanic and Atmospheric Administration's (NOAA) paper and Electronic Navigation Charts (ENCs), among other products. Simply speaking, it is a 3D waterway roadmap that plots channel boundaries, reaches, and channel quarters. (Centerlines and stationing will be added to the database during FY15). Many channels are currently supported, and data for additional channels is being added daily.

The Channel Framework Data Extraction Tool allows you to extract and download specific NCF data. Using either the polygon or pencil, select one or more channels on the map, identify the appropriate download format, and then click Extract Data. The requested data is downloaded to your workstation as a ZIP file.

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Hydrographic Surveys

To view a list of hydrographic surveys that have been processed and uploaded by USACE Districts, select the coastal or riverine area of interest. The map zooms to the selected location, displaying the channel framework and latest survey data. You have the option of downloading a PDF map and XYZ datasource of the survey, or downloading the map data in various formats. The hydrographic surveys provided by this application are to be used for informational purposes only and should not be used as a navigational aid. Channel conditions can change rapidly and the surveys may or may not be accurate.

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