Draw Flow Polylines

Function

This command draws polylines that represent flow lines. When drawing a network of flow lines, first draw the main branch. Then begin drawing the other flow lines from the top of flow and use the Join option to connect onto the main branch. Always draw the flow polylines from the highest to lowest elevation (in the direction of flow). Draw Flow Polylines is the first command in a series that produce the watershed schematic for TR-20 Hydrograph Development. These flow polylines only represent the layout of the watershed and they do not need to be drawn to scale. After each flow polyline is drawn, the program prompts for the drainage area, curve number and time of concentration of the branch associated with that flow polyline. This data is used in the RUNOFF statement in TR-20. The flow polyline label shows the area over the curve number and time of concentration.

Prompts

Text size <4.0>: press Enter This will be the text size for the flow polyline labels.
End/Pick point: pick a point
Undo/End/Join/Pick point: pick a point
Undo/End/Join/Pick point: pick a point
Undo/End/Join/Pick point: press Enter
Drainage Area Dialog
Draw another flow polyline (<Yes>/No)? press Enter
End/Pick point: pick a point
Undo/End/Join/Pick point: pick a point
Undo/End/Join/Pick point: Join
Select flow polyline at place to join: pick the main branch at the junction
Drainage Area Dialog
Draw another flow polyline (<Yes>/No)? No

Main flow polyline with one branch

Pulldown Menu Location: Watershed
Keyboard Command: trflow
Prerequisite: None
File Name: \lsp\poly3d.arx