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...thumb|none|left|550 px|HY8 Modeling Wizard showing the ''Define and Smooth Streams'' step.]] When building a GSSHA model, define the parameters for and smooth all the streams in the model before building the 2D grid. When the 2D grid is generated, t

The ''Watershed from Raster'' tool derives a watershed and its streams locations from an elevation raster and one or more outlet locations. This i ...t_book/available_tools/stream_network_analysis.html#ExtractStreams Extract Streams]''

* [[WMS:Streams|Streams]]

...using a DEM, the results are always converted to points (outlets), lines (streams), and polygons (boundaries) for more convenient data storage and manipulati

...er. They appear similar to stream feature arcs, but are not. On a TIN the streams are defined simply as connected vertices. ==Create Streams==

[[WMS:Define and Smooth Streams|Define and Smooth Streams]] ·

...ions coverage containing a stream network is provided, the cells where the streams intersect the grid are not altered. For more information on cleandam.exe, r ...containing the stream network. Optional. If provided, cells intersected by streams are not altered.

..._ugrids_from_watersheds_1.png|thumb|none|500 px| Input watershed polygons, streams, and raster.]] This tool converts the watershed boundaries and streams to UGrids and assigns elevations to the UGrids as follows:

...will cause the streams to be denser while higher values will create fewer streams in the completed model.

* [[WMS:Streams|Streams]]

...ordered by selecting the downstream most point and choosing the '''Reorder Streams''' command from the ''Feature Objects'' menu), and then convert the coverag

...udes points, lines, and polygons that are used in WMS to represent basins, streams, and key points such as outlets or culverts. In WMS we refer to this GIS da ...database, or it may be straight-forward to trace an existing map to define streams and basins. With WMS, properly structured hydrologic models can be created

...File|Save GSSHA Project File]]{{·}}[[WMS:Smooth GSSHA Streams|Smooth GSSHA Streams]]{{·}}[[WMS:GSSHA Snowmelt Options|Snowmelt]]{{·}}Solution ([[WMS:GSSHA S

...ns can be included when computing the cell elevation dataset (see “Include streams in cell elevations” below). *''Include streams in cell elevations'' – If selected, and the boundary conditions cover