This tutorial demonstrates how to create two kinds of surface analysis: watershed and water drop.
You use watershed analysis, which is one of several types of analysis that you can perform on a surface, to visualize and analyze the surface watersheds. You use water drop analysis, which is a separate utility, to trace the path that water would take across a surface. This tutorial includes the following general steps:
- Configuring the watershed display and legend settings.
- Configuring and creating a watershed analysis.
- Inserting the watershed legend table.
- Extracting objects from a surface.
- Configuring and creating a water drop analysis.
- Creating a catchment area.
AutoCAD Civil 3D uses the surface TIN lines to calculate the areas that water would flow along the surface. From these areas, the drain targets and watersheds are determined.
Other types of surface analysis include slope, aspect, elevations, and contours.
For more information, see the AutoCAD Civil 3D Help topics Watersheds and Analyzing Surfaces.
Topics in this section
- Exercise 1: Configuring a Style for Watershed Display
In this exercise, you will configure a style for watershed display.
- Exercise 2: Generating a Watershed Analysis
In this exercise, you will generate and display the watershed analysis.
- Exercise 3: Creating a Watershed Legend
In this exercise, you will add a watershed legend table to the drawing.
- Exercise 4: Extracting Objects from a Surface
In this exercise, you will use the watershed data to create non-destructive AutoCAD objects from the surface.
- 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.