2.0

Chapter 2 Working with Ponds
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10 Under Modify Pond, you can type a value for the water surface elevation in the
Surface Elev box to reflect revised water levels.
11 Click Save to save the current data to a file.
The data is stored in the c:\Land Projects R2\<project name>\hd folder with
the same base name as the pond and a .pda extension.
12 Click Plot to view and save the rating curve and stage-discharge curve.
The following five illustrations show structure attachment points. The
attachment point for each structure is at the top of the structure, and can vary
for each type of structure.
NOTE
The riser attachment point varies because it must be based on the base
flow. An internal rating curve is created and the base of this rating curve is
the riser elevation or structure elevation.
NOTE
The structure elevation for the rating curve is the x-axis.
The following illustration shows the channel attachment point:
Channel attachment point
The following illustration shows the culvert attachment point:
Culvert attachment point