Use HEC-RAS to generate inundation extent maps - HEC-RAS tips (2)
I. Introduction
Using the RAS Mapper window of HEC-RAS (version 5.0.7 or later) to generate a watershed inundation extent map is a simple and fast process, and the generated results can be directly stored as SHP or KML files, making it easy to use GIS or CAD to process the results later.
2. Load the submerged range results
Then use the RAS Mapper viewport to build a simple one-dimensional hydrodynamic model - HEC-RAS tips (1) (Article portal: https://blog.csdn.net/zhaomaomi/article/details/130826481), run the model A default result file will be generated in the RAS Mapper results (insert picture description Results here
) data tree.
Right-click Depth (PF 1) and select Edit Map Parameters to enter the Results Map Parameter setting window.
Select Inundation Boundary in the Map Type check box in the Results Map Parameter. Check the traffic conditions that need to be displayed in the Steady Profile check box. Click Save Map.
This is the original water depth (Depth...) on the data tree changed to the submergence range (Inundation Boundary...).
Right-click the Inundation Boundary… and select Compute/Update Stored Map… in the pop-up menu.
After waiting for the calculation to complete, the inundation range will be loaded on the map terrain on the right. Right-click the Inundation Boundary... and select Layer Properties in the pop-up menu to enter the layer properties page.
On the layer properties page, you can change the color and transparency of the submerged range, etc., so that we can observe the relationship between the ground objects and the water surface edge.
3. Result export
Right-click on the data tree Results-Plans 01-Inundation Boundary..., select Export Layer-Save Features to Shapefile in the pop-up menu bar,
name the exported SHP file, and click Save.
Load the results into Arcgis.
