Stormwater Management Model (SWMM) Information for watershed water quality, hydrology and hydraulics modelers (Note this Blog is not associated with the EPA). You will find Blog Posts and Twitter Embeds on the Subjects of SWMM5, InfoSWMM, InfoSewer, SWMMLive, InfoSWMM SUSTAIN, SWMM4 and SWMM in general.
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Surcharged d/D in InfoSWMM and H2OMap SWMM
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 Capacityis 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.
Engine Error NumberDescription ERROR 101: memory allocation error. ERROR 103: cannot solve KW equations for Link ERROR 105: cannot open ODE solver. ERROR 107: cannot compute a valid time step. ERROR 108: ambiguous outlet ID name for Subcatchment
World-Renowned Urban Drainage Modeling Authority Robert Dickinson Joined Innovyze in January, 2008Broomfield, Colorado USA, January 16, 2008/altered 20142008/2014 Robert E. Dickinson, one of the world’s leading experts in wastewater and urban drainage modeling, has joined Innovyze as Product Sector Leader. Dickinson, who comes to the company from CDM now CDMSmith, will be charged with maintaining, enhancing and supporting Innovyze's flagship SWMM5-based product line (InfoSWMM and H2OMAP SWMM as well as the GIS based InfoSewer and H2OMap Sewer), which are some of the industry’s leading wastewater and urban drainage systems design and modeling software. He will also be responsible for coordinating vital collaborative research and technology transfer with key universities and government organizations as well as developing business strategies that advance Innovye’s overall growth objectives in wastewater and stormwater systems management and heighten its initiatives in both U.S. and i…
Soffit Level (pipe technology)The top point of the inside open section of a pipe or box conduit. The soffit is the highest point of the internal surface of a pipe or culvert at any cross-section. The soffit is also referred to as the pipe obvert. So it is not quite the Crown of the Pipe. Here is an image I found that hopefully explains it better.