SWMM56

Note:   Steps in converting a  Arc GIS 10 Model  to a  Arc GIS 9.3 Model  in  InfoSWMM  or  InfoSewer Step 1.   Make an empty  Arc GIS 9.3  model in InfoSWMM using the  Arc GIS Default  when initializing the model, Step 2.   Save the empty model and then copy and paste the files from the  Arc GIS 10 ISDB  folder to the  Arc GIS 9.3  folder, but not the MAP sub directory, Step 3.   Open the  Arc GIS 9.3 mxd  file and then use the  Tool Update Map from DB  after Initialization, Step 4.   Zoom to the model extents and then set data frame to the model view so it can be used more efficiently in the future before saving the model. An alternative Method Note:   Steps in converting a  Arc GIS 10 Model  to a  Arc GIS 9.3 Model  in  InfoSWMM  or  InfoSewer 1.    You have a Arc GIS 10 file f...

Note : SWMM 5 and InfoSWMM Time Lines SWMM 5 and InfoSWMM Time Lines

Subject: Cutoff Divider in the SWMM 5 Kinematic Wave Solution A divider node in the SWMM 5 Kinematic Wave solution will divide the inflow to a node for two downstream links based on three criteria: 1. Cutoff Divider, 2. Tabular Divider, and 3. Weir Divider The rule for a Cutoff Divider is that the flow up to the Cutoff Flow will flow down the undiverted link and any flow over the cutoff flow will go down the diverted link. If the total inflow to a node the current flow in the undiverted link then the extra flow will go down the diverted link even though the flow in the undiverted link is not equal to the cutoff flow. Figure 1.  How the Cutoff Divider Works in SWMM 5

Note:  SWMM 5 Slope Rules The relationship between the upstream and downstream node invert and offset elevations, the input conduit length and the slope used in the SWMM 5 simulation are shown in Figure 1. SWMM 5 Slope Rules

Subject:   This is how SWMM 5 handles  jumps in pipe invert across a node.  The water surface in the node determines the flow in the link, as the depth increases due to upstream inflow eventually the downstream link will start flowing. A rise in Pipe Inverts Across a SWMM 5 Node

Subject:  Adverse sloped links in SWMM 5 or InfoSWMM This is how an adverse sloped link is treated in SWMM 5 or InfoSWMM – the link is reversed so that the link now has a positive slope and the original upstream node is now the downstream node. The flow in the reversed link is now negative as it moves from the original Node A to Node B and the flow is positive if the flow moves from the original node B to Node A. Figure 1.  How Adverse Sloped Links are Treated in SWMM 5.

Subject: January 17, 2011 Rainfall Event in Hillsborough County, Florida Figure 2.  SWMM 5 Rainfall Event