User:Jcreer/SMS:1D Module

The purpose of the 1D Module is to provide tools to perform one dimensional hydraulic modeling within SMS. The module include tools to process digital terrain (scattered datasets) and map data (coverages) to build the basic geometry necessary for a 1D hydraulic model. Much of the information for developing models with these tools is described in the information on 1D Hyd Centerline and 1D Hyd Cross Section coverages in the Map module.

Currently the only major model supported is HEC-RAS. The module includes tools for visualizing results computed for cross sections and reaches.

The general process for developing a model consists of the following steps:

1. Import bathymetry data.
2. Developing a 1D-Hydraulic Centerline coverage including the centerline and optional bank arcs.
3. Creating the cross section arcs at important/required locations along the section of river being modeled.
4. A shapefile can be used to map roughness values to line properties on the cross sections.
5. Extracting cross sections from the TIN and establish the 1D Model.
6. Export the GIS data and finish defining HEC-RAS (or other models).

Alternatively, It is possible to establish the hydraulic model without extracting cross section information from a TIN. Cross sections which have already been surveyed can be assigning to an arc. This, along with geo-referencing the data is done using the cross section editor from the River Tools menu in the Map module.

The heart of the 1D River Hydraulic Module is a database of cross sections. A set of tools called the Cross Section Database Manager allows editing and managing the cross sections. All cross sections referenced from the 1D River Hydraulic Module or the Map Module must be part of this database. Cross sections may be added to the database by importing data from an external source, hand editing in the Cross Section Database Manager, or extraction from topographic data in the Map Module.

River networks are displayed as a schematic of reaches and cross sections. Networks may be georeferenced or purely symbolic. Each cross section is represented by a cross section icon displayed at the location of the cross section if the section is georeferenced, and reach icons, which are displayed on top of the first cross section in each reach. The icons can be moved according by selecting the icon and dragging it to the desired location.

The cross section attributes can be changed by using the Select Cross Section tool. Double-clicking on the desired cross section opens the River Cross Section Atts dialog which can be edited similar to the Map Module. The only difference is that the reach the cross section is attached to cannot be changed. Likewise the reach attributes can also be changed within the 1D River Hydraulic module.

Module Menus

See 1D River Module Menus for more information.

Related Topics

• Area Property Coverage
• 1D Hyd Centerline Coverage
• 1D Hyd Cross Section Coverage
• HEC-RAS
• Modules