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.
Subscribe to this blog
Follow by Email
How is the Maximum Link Flow Applied in SWMM 5?
Subject: How is the MaximumLinkFlowApplied in SWMM5?
The maximumflow limit for a link applies to the kinematic wave and the dynamic wave solution. The inflow to the link in the kinematic wave solution is limited (Figure 1) but the calculated linkflow is limited in the dynamic wave solution after the linkflow (Figure 2):
1. Is checked using the Culvert Inlet Equations (optional) 2. The normal flow equation is checked (internally optional depending on the Normal flow options) and 3. The Picard iteration solution under relaxation parameter (always 0.5) is applied (Figure 3).
Figure 1. Kinematic Wave Solution Limits the Inflow to the LinkMaximum limit.
Figure 2. Dynamic Wave Solution linkflow limit.
Figure 3. The Linkflow in the dynamic wave solution has three checks at each iteration in a time step.
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.