Fixed Slopes

Create banks around a terrace with constant slopes.

This function allows you to generate bank points along each side of a terrace, using the same cut or fill slopes along the entire perimeter.

Before using this function, it is a good idea to Zoom onto the particular terrace of interest so it fills the whole screen. Click on any one of the terrace points defining the perimeter, to identify the perimeter of interest. The perimeter is then tracked and any previously generated bank points connected to the selected perimeter are removed.

Data entry consists of:

• The cut-and-fill slopes to apply.

• A name suffix to add to the generated bank points.

• The interval between generated points along the terrace edges.

• A search distance from the terrace edge.

Two further options exist:

• The terrace can be raised or lowered prior to calculation.

• A unique serial number can be attached to each generated toe point.

The purpose of the serial number is to facilitate the extraction of placing data for setting out the terrace.

Bank points are generated along each edge of the terrace at the specified interval. Each bank intersection with the ground is at, or within, the search distance from the edge.

The optimisation option also calculates terrace volumes by either band, prism or contour. See Band vs Prism Volumes for details on the various options.

Procedure

1. The Bank Surface Details display.

2. Fill in the relevant data and click OK.

3. You are prompted to:

Snap on terrace point

4. Click on one of the terrace points.

5. Once the terrace has been located the Fixed Slope Details display.

6. Specify the cut and fill slopes and click OK.

7. The Bank Creation Details display.

8. Fill in the relevant data and click OK.

9. The terrace banks are now calculated. Optimisation calculations are done and the following message displays.

10. Click Yes to list the new elevations of the optimised terrace top.