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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How to Find the Proportional loading to a link or manhole in InfoSewer
Subject: How to Find the Proportional loading to a link or manhole in InfoSewer
Subject:How to Make Contours in InfoSWMM and H2OMAP SWMM
It is easy to make contours out of node input data or node output data in InfoSWMM and H2oMAP SWMM using the Contour Tool in the Contour Tab of the Attribute Browser. You can control the resolution and the type of smoothing for the created contour (Figure 1). If you haveInfoSWMM Suite you can use the Contour to DEM command in the Subcatchment Manager to convert the created Contour to an Elevation or DEM file (Figure 2 and Figure 3). The Layer properties for the created elevation can be altered in Arc GIS to make a better visual depiction of the elevation (Figure 4).
Figure 1. Contour Tool in the Contour Tab of the Attribute Browser.
Figure 2. Contour to DEM command in the InfoSWMM Subcatchment Manager will convert the created Contour to an Elevation or DEM file.
Figure 3. Convert the Value Field and NOT the level Field of the contour.
Figure 4. The Arc GIS Layer properties can be used to alter the default color ramp and the number of classes used in the color ramp.
Comment: A really nice water analogy for the field properties Divergence, Curl and Gradient from the Blog Starts With a Bang
....it's pretty mathematically intensive, but what's missing from most textbooks and E&M courses are physical explanations of what the mathematics means. For instance, I've started teaching about fields, and pretty much every textbook out there goes on and on about the properties of fields. They say you can do three things to fields, take the gradient, divergence, orcurl of them. (Are you asleep yet? I'm sorry!) What do these things mean? An easy way to picture it is in terms of water. If you placed a drop of water anywhere on, say,Earth, the magnitude and direction of how it rolls down is the gradient of the Earth's elevation. If you let that drop of water flow, as it goes downhill, it can either spread out or converge to a narrower stream. When we quantify that, that's what the divergence of the field is. And finally, when that water is …
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.
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