Subject: How to Use Two Control Curves in SWMM 5 to Simulate a Head Difference Rule
The SWMM 5 control rules for Real Time Control (RTC) do not allow the rule to be governed by the head across the orifice but does allow rules based on the depth, head and
Advanced Labeling in InfoSWMM or H2OMAP SWMM to show MM or IN on a HGL Plot
Here is how to get the maximum depth shown in millimeters or inches on a HGL Plot in InfoSWMM or H2OMAP SWMM– use the OTHER LINK Dimensions option. You need to run the … Read the rest
The SWMM 4 Dynamic Wave Solution
The attached PDF file is a copy of Appendix C of the SWMM 4 manual explaining the three St Venant solutions in SWMM 4 / Extran 4. The current SWMM 5 solution in its dynamic wave solution is an adaptive time step iterative solution
The SWMM 4 Dynamic Wave Solution for ISOL=0
The attached PDF file is a copy of the Extran 3 solution in the SWMM 4 manual explaining the ISOL=0 solution in SWMM 4 / Extran 4. The current SWMM 5 solution in its dynamic wave solution is an adaptive time step
Continuous Simulation using SWMM 5 LID and Groundwater Features in a Linked 1D/2D Network using InfoSWMM 2D for a 50 Year Period
A poster at the recent ECI conference on the Past, Present and Future of Watershed modeling.
via Blogger http://www.swmm5.net/2013/08/continuous-simulation-using-swmm-5-lid.html… Read the rest
How to Create an InfoSWMM model from CSV Files
An InfoSWMM model can be newly created from a CSV file but it helps to have a background map or shapefile to initialize the Arc Map project. BEFORE initializing yourInfoSWMM map Add a data layer using the Arc Map command … Read the rest
InfoSewer Minimum Travel Time Sensitivity
The three Run manager parameters, Maximum Number of Segments, Minimum Travel Distance and the Minimum Travel Time in InfoSewer and H2OMAP Sewer affect the shape and flow attenuation of the flow in a link. The effect of decreasing the Minimum Travel Time is to reduce … Read the rest
How to Create an InfoSWMM model from CSV Files, Alternate Method
An InfoSWMM model can be newly created from a CSV file but it helps to have an idea of the maximum extents before you initialize the Arc Map project. Use the ArcGIS default and Edit the extents of … Read the rest
The Structure of InfoSWMM in Arc Map
via Blogger http://www.swmm5.net/2013/08/the-structure-of-infoswmm-in-arc-map.html… Read the rest
Siphon Modeling in InfoSewer and Arc Map
Here is at typical view of a siphon in InfoSewer, the rising links have a d/D of 1 and the dropping links typically have a d/D value less than 1. The q/Q for the rising links is based on the slope and … Read the rest
1. Volume
2. Level
3. Discharge
4. Inflow
5. Time
SWMM 4 and SWMM 5 St. Venant Solutions Contrasted
1. Compute at time t+delta t the values of dQ/dt for the Links and dH/dt for the Nodes from the properties at time t
2 Iterate at least 2 times until either all nodes and links are converged or a … Read the rest
InfoSewer Inflow Control for a PUMP
You can control the pumps in InfoSewer and H2OMap Sewer by using a Pump Control which will control the pump based on:
1. Volume
2. Level
3. Discharge
4. Inflow
5. Time
If you use a By Inflow control the pump speed of the … Read the rest
InfoSewer Maximum Number of Segments Sensitivity
The three Run manager parameters, Maximum Number of Segments, Minimum Travel Distance and the Minimum Travel Distance in InfoSewer and H2OMAP Sewer affect the shape and flow attenuation of the flow in a link. The effect of decreasing the Minimum Travel Distance is … Read the rest
Singapore - Catching Every Drop of Rain
The source of the map of the rivers of Singapore is the Singapore PUB
As a small island that doesn't have natural aquifers and lakes and with little land to collect rainwater, Singapore needs to maximize whatever it can harvest.
Currently, Singapore uses … Read the rest
Subject: Non Linear Term in the Saint Venant Equation of SWMM 5
The flow equation has six components that have to be in balance at each time step:
1. The unsteady flow term or dQ/dt
2. The friction loss term (normally based on Manning's equation except for full force mains),… Read the rest
Subject: Successive under-relaxation for the SWMM 5 Dynamic Wave Solution
SWMM 5 uses the method of Successive under-relaxation to solve the Node Continuity Equation and the Link Momentum/Continuity Equation for a time step. The dynamic wave solution in dynwave.c will use up to 8 iterations to reach convergence before moving
The time flooding in SWMM 5 is pretty simple:
1. It is the sum of all time steps in which excess flow is coming out of the top of the manhole or
2. If you are using the ponding option then it is the time the surface pond has more