AutoCAD objects are created from each of the watersheds in the drawing.
5
In the drawing, click inside a watershed area.
A blue grip appears inside the area, indicating that you have selected an
AutoCAD object.
6
On the command line, enter List.
The AutoCAD text window displays parameters for the object you selected.
You can use any of the standard AutoCAD commands to modify or query
the new object.
To continue this tutorial, go to
Exercise 5: Analyzing Surface Water Runoff
(page 101).
Exercise 5: Analyzing Surface Water Runoff
In this exercise, you will create lines that illustrate the path that flowing water
would take across a surface. Then, you will create a polygon that defines the
catchment region and its area on the surface.
The water drop utility creates either a 2D or 3D polyline object that runs
downhill on a surface from any point you select. You can specify whether the
point you select is indicated with a marker. After the lines are created, you
can edit or modify them as needed.
You can use the information you get from the water drop analysis to calculate
catchment areas, based on specified low points of the surface. The catchment
regions can be created on the surface as either 2D or 3D polygons, which can
be exported to a hydrology application for detailed analysis.
For more information, see the AutoCAD Civil 3D Help topics Drawing Water
Drop Paths and Displaying and Calculating Catchment Areas.
This exercise uses a drawing file similar to the one used in
Exercise 3: Creating
a Watershed Legend
(page 99). The surface style is changed to make it easier
to see the basic surface features, and it contains a simple point style for you
to use as a start point marker.
This exercise continues from
Exercise 4: Extracting Objects from a Surface
(page 100).
Perform a water drop analysis
1
Open Surface-5C.dwg, which is located in the
tutorial drawings folder
(page
819)
.
Exercise 5: Analyzing Surface Water Runoff | 101
Summary of Contents for AUTOCAD PLANT 3D 2011 - SYSTEM REQUIREMENTS
Page 1: ...AutoCAD Civil 3D 2011 Tutorials April 2010 ...
Page 58: ...46 ...
Page 70: ...58 ...
Page 73: ...Tutorial Creating and Adding Data to a Surface 61 ...
Page 140: ...128 ...
Page 378: ...7 Press Enter 366 Chapter 10 Parcels Tutorials ...
Page 385: ...8 Press Enter Exercise 2 Swinging One End of a Parcel Lot Line 373 ...
Page 432: ...420 ...
Page 470: ...458 ...
Page 506: ...494 Chapter 13 Corridors Tutorials ...
Page 580: ...568 ...
Page 668: ...656 ...
Page 678: ...23 Change your view to SW isometric 666 Chapter 18 Part Builder Tutorials ...
Page 679: ...24 Change your visual style to Conceptual Exercise 2 Defining the Manhole Geometry 667 ...
Page 706: ...694 Chapter 18 Part Builder Tutorials ...
Page 830: ...818 ...
Page 832: ...tutorial folder AutoCAD Civil 3D installation location Help Civil Tutorials 820 Glossary ...