Open the file ID_US_Advanced_Tutorial_Ch2.iddx or continue working from your previous file. 
	 
- Right-click the 
		  Existing 
		  phase under the 
		  Phase Management, Storm section of the 
		  Tree View panel and select 
		  Duplicate Phase. 
		  
 
		  
 
		 
- We now have a couple of edits to make to prepare for setting up the new Phase. 
		  
- Right-click again the new phase 
				Existing (1) and select 
				Rename Phase then change the name to 
				Developed. 
			 
 
- Check that you have switched to the Developed Phase by selecting from the drop-down list on the left Tree View panel. 
				
 
				
 
			  
- Expand the options under the 
				CAD Data. Turn off all the layers by clicking the box next to the 
				Stormwater_dev.dwg file and then turn on the two Proposed layers to show the development layout. You can then close the expanded tree again. 
				
 
				
 
			  
 
		 
- Before you plan the Developed site design, you can apply a deluge to the site to identify main flow paths and ponding areas based on the Surface that has been loaded. To use the Deluge quick overland flow analysis, right-click on the 
		  2D Analysis option and select Deluge, as shown below: 
		  
 
		  
 
		 
- Enter the analysis parameters below and then click OK. 
		  
 
		  
 
		 
- A surface flow depth map will be shown. Select 
		  Flow Direction in the Tree View to display the flow direction arrows. Right-click in the 
		  Plan View and open 
		  Display Settings 
		  to change the colours used.  
		  
 
		  
The Deluge map provides information on runoff within the site and can be used as a guide for laying out stormwater control systems and other site features. For example, swales can be located along natural flow paths, and buildings located away from ponding locations. The Deluge map is showing that runoff will naturally collect in the middle of the site and then drain to the north-most boundary. We will plan the placement of our Stormwater Controls in these areas to minimize site grading.  
		 
- Turn off the visibility of the Deluge map by clicking the 
		  2D Anaysis 
		  layer check box in the Tree View panel.