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Showing posts from January, 2014

EPA Releases Climate Assessment Update to National Stormwater Calculator

EPA Releases Climate Assessment Update to National Stormwater Calculator WASHINGTON –Today, the U.S. Environmental Protection Agency (EPA) released phase II of the National Stormwater Calculator and Climate Assessment Tool package. The updated calculator includes future climate vulnerability scenarios.

The calculator, a part of President Obama’s Climate Change Action Plan, is a desktop application that estimates the annual amount of stormwater runoff from a specific location. The calculator now includes changes in seasonal precipitation levels, the effects of more frequent high-intensity storms, and changes in evaporation rates based on validated climate change scenarios by the Intergovernmental Panel on Climate Change.

“Climate change threatens our health, our economy, and our environment,” said Gina McCarthy, EPA Administrator. “As part of the President’s Climate Action Plan, this tool will help us better prepare for climate impacts by helping build safer, sustainable, and more res…

Reasons to use the Advanced Force Main Network Support Option in InfoSewer and H20Map Sewer

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See the image for the two main reasons but another reason is that you get a better continuity error with this new(er) feature or option in InfoSewer


InfoSewer Infographic or Map of Features

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A basic Index to @Innovye for Sanitary and Storrmwater Networks

The main features of an InfoSewer Network with labels.  This version uses the normal Force Main solution but if the upper grey set of links is added then you have to use the Advanced Force Main Solution.



The new EPA SWC January 2014 (Stormwater Calculator) has Near and Far Term Climate Change Scenarios

The new EPA SWC January 2014 (Stormwater Calculator) has Near and Far Term Climate Change Scenarios http://t.co/3SYZRDnona
— Robert E Dickinson (@RDickinson) January 30, 2014

Surface Ponding and its Impact on Irregular Channels in SWMM5

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Surface Ponding and its Impact on Irregular Channels in SWMM5

A few considerations to think about when you are modeling natural channels or irregular channels in SWMM 5:
1. The Maximum depth is limited to the Transect Highest minus the Lowest Elevation
2. If the Maximum depth is reached during the simulation any excess water from the upstream node is either stored at the upstream node or lost as flooded water
3. If the excess water is stored it means you are using the Surface Ponding option in SWMM 5
4. If you using the Surface Ponding option then the depth at the upstream node will increase based on the Excess Flow / Pond Area
5. The Irregular channel is restricted to full flow but if the HGL at the upstream head rises you can get more flow through the Irregular channel as the flood level rises.
6. The flow is thus sensitive to the ponding area



How to Use Qfull in a Map Display in InfoSWMM

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How to Use Qfull in a Map Display in InfoSWMM and H2OMap SWMM
Here is how you can plot the Qfull for a link on the Map Display: 1.Copy the Qfull Value from the Run Manger Conduit Summary Output Table 2.Paste it into the DB Table for Conduit Information, You will need to make a new column with a numeric type 3.  TheMap Display will now have a Map Display variable called Qfull or whatever you created 4.The Map will now show the  value of Qfull or the full flow based on Manning's equation

Snippet of 25 Water Quality Constituents for SWMM 5

This is for students of SWMM 5 who want to quickly have many water quality constituents in their model.  You can copy and paste this snippet to your SWMM5.INP file and change the coverages sections to have 25 Pollutants with Buildup and Washoff Sections.  I hope this helps you in your water quality modeling.

[POLLUTANTS]
;;              Mass  Rain      GW        I&I       Decay     Snow Co-Pollut.      Co-Pollut.DWF
;;Name          Units Concen.   Concen.   Concen.   Coeff.    Only Name            Fraction  Concen.
;;-----------------------------------------------------------------------------------------------------
AmmonicalNitrogenNH3-NMG/L  1         0         0         0         NO   *               0         0
BiochemicalOxygenDemand(BOD)MG/L  1         0         0         0         NO   *               0         0
CalciumHardness MG/L  1         0         0         0         NO   *               0         0
ChemicaOxygenDemandCODMG/L  1         0         0         0         NO   …