SWMM56

The value of d/D in InfoSWMM is calculated as Link capacity or the Midpoint Capacity Whereas the Surcharged d/D is calculated from the end node depths or Surcharged d/D = Average depth in the middle of a link or ½ (Upstream Depth + Downstream Depth) / Maximum depth Midpoint Capacity = the midpoint cross sectional area (based on the average depth) / the full cross sectional area If you look at the reports d/D or Midpoint Capacity is not quite the same as the Surcharged d/D which is based on the upstream and downstream depths and not the Capacity (a function of Area).  I hope this explains why Surcharged d/D is equal to the Depth and not the same as the d/D or Midpoint Capacity . Inverse Color Attribute Browser in InfoSWMM and H2OMap SWMM showing various output data.

How to Use the Arc Map Editor in InfoSWMM Note:   How to Use the Arc Map Editor in InfoSWMM Step 1  is to use the Edit Feature for example the Subcatchment layer to bring up the Arc Map Editor Tool. Step 2  is to use the Reshape Feature tool or Vertex tools to bring together mis matched Subcatchment Boundaries Step 3  is to use save the edits and then Update the DB from the Map to recalculate the area of the Subcatchments Subject:  InfoSWMM and Arc GIS for Create Graphs Using Network Data and Model Results An important advantage of using InfoSWMM is the ability to use all of the Arc GIS layer and programming tools.  For example, you can graph the model results in Bar,  Pie, Scatter, Bubble or other types of Graphs once the model data and model result layers are Joined together.  The image below shows a thematic mapping for Node Flooding, Conduit Force Main Type and a  Pie  and  Bar Chart  of  Node Flooding T...

Manhole Elevations in InfoSWMM and SWMM 5 Subject:  Manhole Elevations in InfoSWMM and SWMM 5 Starting from the bottom of the manhole you have these regions of computational interest: 1.   Manhole Invert to the lowest link invert – the node continuity equation is used with the area of the manhole being the default surface area of a manhole, 2.   Lowest Link Invert to the Highest Link Crown Elevation – the node continuity equation is used with surface of the node being normally half of the surface area of the incoming and outgoing links, 3.   Highest Manhole Pipe Crown Elevation to Manhole Rim Elevation – the node surcharge algorithm in which the surface area of the manhole is not used and the surcharge depth is iterated until the inflow and the outflows of the node are in balance, 4.   The region above the Manhole Rim Elevation which can use one of four options to calculate the depth and/or flow out of or into the manhole:...

SWMM 5.1 Update History ======================= -------------------------- Build 5.1.008 (04/02/2015) -------------------------- Engine Updates: New Features: ============= 1. Monthly adjustments for hydraulic conductivity used for rainfall infiltration and for exfiltration from storage nodes and conduits was added. 2. LID drains can now send their outflow to a different node or subcatchment than the parent subcatchment in which they were placed. 3. Conveyance system Outfall nodes now have the option to send their outflow onto a subcatchment, to simulate irrigation or complex LID treatment options. 4. A new LID practice, Rooftop Disconnection, has been added. It allows one to explicitly model roof runoff with an optional limit on the flow capacity of their downspouts. Disconnection is specified by setting the Return To Pervious Area field in the [LID_USAGE] section to 1. 5. An optional soil layer has been added to Permeable Pavement LIDs...

The key problem discussed here is to keep the Force Mains full or d/D equal to 1 when the pumps turn on, it is sometimes difficult to get it to work like ICM or IWCS due to the fact that there is only one Q in the link of the SWMM 5 solution compared to the 4 or more flow points in the IWCS solution.  I have suggested in past that the user add a break node in the force main at the end so that the downstream end of the Force Main is full – however does not always work if there is a gravity main at the end of the rising force main.  The gravity main takes all of the flow coming down the long force main and the downstream node depth stays small so the Force Main is never full – this annoys the customers.    My suggestion is to increase the gravity main roughness to simulate the effect of the force main transitioning to the gravity main – this keeps the depth higher and the force main full most of the time and full when the pump turns on.   Here are eight sugge...

Inlets in SWMM5 and InfoSWMM for Dual Drainage 1. HEC-22 Inlets- InfoSWMM Only 2. Outlet Link 3. Orifice 4. Weir  http://t.co/tsZMzFgodw   Feb 01, 2015   Jefferson Parish officials propose changes to FEMA flood maps  http://t.co/DCk2Sji9Rp  via @nolanews  http://t.co/otwIL2vmsW   Feb 01, 2015   WikiLand View of the SWMM5 Wikipedia Article  http://t.co/imgCzwwqHi  February 01, 2015 at 09:57AM  http://t.co/xp016PwL6z   Feb 01, 2015   Woo woo! Wonderful portraits of owls by Brad Wilson  http://t.co/F6w6s8VCNu   Feb 01, 2015   Ultra-HD time lapse of the entire Earth in infrared shows the turbulent motion of the atmosphere  http://t.co/hIi3VnH52k   Feb 01, 2015   Easy Steps to Export to SWMM5 from InfoSWMM in Arc GIS 9.3. 10. 10.1, 10.2, 10.3  http://t.co/WNh90rBvki   Jan 31, 2015   Easy Steps to Import SWMM5 to an Arc Map for InfoSWMM  http://t.co/ywe67OZ83P   Jan 31, 2015...