A description of some of the water and storm modeling tools in Civil 3D. This was a specialized presentation, so the slide background was scrubbed out and a standard design used in its place.

1. Richard Chappell
Geospatial Application Engineer

2. Richard Chappell – “Rick”
Geospatial Application Engineer
CADsoft Consulting, Inc
1295 W. Washington St., Suite 201,
Tempe, AZ 85281
480-820-0408
rick.chappell@cadsoft-consult.com
http://www.cadsoft-consult.com/blogs/geo/
http://www.linkedin.com/in/richardchappell

4. Watersheds of land where all the water
Watersheds are the areas
that is under it, or drains off of it goes into the same
place.
They are divided up into
basins where all of the
water drains to some
outlet

5. Subdividing Basins
 All land drains to
somewhere
 Major basins are
further subdivided
into smaller basins

6. Subheadline goes here and here

7. Modeling
 Runoff is determined for a basin
 It is determined by
o The anticipated rainfall – amount of water in
o The imperviousness of the soil – how much gets
absorbed
o The characteristics of the ground cover – the rate of flow

8. GIS Overlays

9. Using your stream data to do calculations and analysis

10. US Army Corps of Engineers
Hydrologic Engineering Center
http://www.hec.usace.army.mil/

11. HEC-RAS
The HEC-RAS system
contains four one-
dimensional river analysis
components for:
o steady flow water
surface profile
computations;
o unsteady flow
simulation
o movable boundary
sediment transport
o water quality analysis.

12. Autodesk’s Interchange Tool
HEC RAS Import/Export Extension
for AutoCAD Civil 3D 2010
 Available from the Subscription
Center
 Includes an import tool
 Converts Civil 3D objects into
HEC-RAS format (.GEO)
 Includes an export tool
 Converts HEC-RAS GIS output
file (.SDF) into Civil 3D objects
 Installs into the Toolbox

13. Process
 Create an alignment for the stream flow
 Create cross section sample lines
o Draw polylines and convert to sample group
 Create polylines for the left and right bank
 Export data into .GEO file
 Open .GEO file in HEC-RAS
 Do Calculations and Analysis
 Export results to SDF
 Import SDF into Civil 3D

14. Stream
Section Lines Alignment
Bank edges
Flow Direction
Stream data from Civil 3D loaded into HEC-
RAS

15. Rick Chappell
Rick.chappell@cadsoft-consult.com