Topsoil Stripping Design

Saving Precious Topsoil With Variable Stripping

Location: Queensland, Australia
Field Area: 84 ha or 208 acres
Irrigation Method: furrow irrigation
Crops: sugarcane

Figure 1. Existing Topography.

Problem

New fields are being developed for a farm. Below is the Proposed Topography from an OptiSurface 2Way design.

Figure 2. Proposed Topography.

The design called for heavy cuts and fills in some areas. The maximum cut was 930mm (3ft) and the maximum fill was 1.750m (5.7ft). See the Cut/Fill Map below.

Figure 3. Proposed Cut/Fill Map.

The client wanted to strip more topsoil in the deeper fill areas which are located in the lower areas of the field which typically have more top soil deposited over many years. Similarly, deeper stripping was desired where the deeper cut were to occur which are typically on the higher ridge areas of the field which naturally have less topsoil.

Solution

A stripping design with variable depths was defined as shown in the parameter table below. This results to the Stripping Depth Map and Stripping Elevation as shown below.

Figure 5. Stripping Elevation.

Figure 6. Proposed Cut/Fill Map (left) and Stripping Cut/Fill Map (right).

Conclusion

OptiSurface Designer provides powerful tools and features to calculate a stripping design. This is useful for landform designs that has heavy cut areas - strip the precious top soil then set aside and work on the subsoil according to the design.

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