Requirement:
The system shall provide the ability to identify the low point at the intersection of a catchment area and the design alignment. This functionality shall assist the user in determining where a culvert is required.

Process:

• Reference the terrain and alignment.

• Activate the Catchment tool.

• Select the alignment.

• Select the terrain model.

• Generate only those upstream catchment areas that intersect the alignment.

Result:
The system shall display only intersecting upstream catchments and identify the relevant low-point location for culvert placement.