Category: Inside SWMM5

Pump Characteristic Curve from Innovyze H2OCalc

Pump Characteristic Curve Pump Characteristic Curve Pump characteristic curves are usually presented graphically describing the relationship between pump head, hp, and the flow rate, Q using either an exponential equation or 3-point […]

Inertia of Pumps and Motors from Innovyze H2OCalc – Idea for SWMM6

Inertia of Pumps and Motors The combined inertia of pumps and motors driving them, including the connecting shafts and couplings, is required for transient analysis associated with the starting and stopping of […]

Flow Calculator (Simple in Innovyze H2OCalc) – Option for SWMM6?

2.3.1 Flow Calculator (Simple in Innovyze H2OCalc) The Flow Calculator category performs hydraulic calculations for the following elements: Circular Channel, Rectangular Channel, Triangular Channel, Trapezoidal Channel, Irregular Channel, and Pressurized Pipe. Circular […]

Innovyze H2OCalc Head loss due to Transitions and Fittings (Local loss)

3.7 Head loss due to Transitions and Fittings (Local loss) Whenever flow velocity changes direction or magnitude in a conduit (e.g., at fittings, bends, and other appurtenances) added turbulence is induced. The […]

Extran Hydraulics Master from #Extran3 and #SWMM4 converted to #SWMM5

This is part of the #Inside_#SWMM5 series of blogs and is intended as a visual aid and code developer for the Storm Water Management Model Reference Manuals on https://www.epa.gov/water-research/storm-water-management-model-swmm I always think […]

How Do the TimeOpen and TimeClose Controls Work in #SWMM 5.1.012

This is part of the #Inside_#SWMM5 series of blogs and is intended as a visual aid and code developer for the Storm Water Management Model Reference Manuals on https://www.epa.gov/water-research/storm-water-management-model-swmm I always think […]

Simple SI Unit Model for SWMM5 LID with 100 mm Rainfall – Part 2

This blog is a companion to the blog post https://swmm5.org/2017/04/17/swmm5-simple-100-mm-rainfall-model-for-lid-modeling-part-1/ in which a 1 Hectare model with 100 mm of rainfall had a simple Bio-Retention Cell with no LID outflows. In part […]

EPA #SWMM5 Build 5.1.012 (03/14/17) Updates

SWMM 5.1 Update History ======================= https://www.epa.gov/water-research/storm-water-management-model-swmm#downloads ———————— Build 5.1.012 (03/14/17) ———————— Engine Updates: 1. The direct.h header is now only #included in the swmm5.c file when compiled for Windows. (swmm5.c) 2. Engine […]

How to See the Highest Continuity Errors Table in the Output Report Manager for #InfoSWMM

How to See the Highest Continuity Errors Table in the Output Report Manager for #InfoSWMM In the output text report file of infoSWMM and H2OMap SWMM there is the Highest Node Continuity […]

Updated – Innovyze St Venant Solutions for InfoSWMM, InfoSewer, H2OMap SWMM and InfoWorks ICM and InfoWorks ICM SE

The assumptions behind Lumped and Distributed Models along with the assumptions of the St Venant Equations. InfoSWMMH2OMap SWMM, InfoSWMM, H2OMap SWMM, SWMM5, ICM and ICM SE are all Distributed models for Unsteady flow. InfoSWMM and InfoSWMMH2OMap SWMM have options for direct steady flow. ICM and InfoSWMM can also use a quasi steady flow solution. All of these Innovyze models use the Continuity Equation and Momentum equation for routing flows in links.

The total losses include both evaporation and infiltration for a 100 Year SWMM 5 Simulation

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM […]

The Internal Green Ampt Parameters, FUMax, FU and FTOT or F for a 100 Year SWMM 5 Simulation for Green Ampt Infiltration

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM using a QA/QC […]

Initial Moisture Deficit or IMD for a 100 Year SWMM 5 Simulation for Green Ampt Infiltration

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM […]

Rainfall and Losses One Watershed for a 100 Year Simulation with SWMM 5 Statistics at a saved time step of one hour.

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM […]

Runoff from One Watershed for a 100 Year Simulation with SWMM 5 Statistics for Peak, Mean and Total Runoff

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM […]

The Link Time Step in SWMM 5, InfoSWMM and H2OMap SWMM

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM […]

The Non Linear Term in the Saint Venant Equation of SWMM 5

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), 3. The bed slope term or dz/dx […]

Hysteresis Effect in the Link Flow versus Depth Relationship in SWMM 5

Subject:  Hysteresis Effect in the Link Flow versus Depth Relationship in SWMM 5 You can often get a hysteresis effect for the Flow versus Depth relationship in SWMM 5 due to the five component St. Venant equation used to simulate the flows (http://swmm5.blogspot.com/2010/12/what-are-units-for-five-st-venant-flow.html) .  A hysteresis effect is having two or more flow values for the same depth value in the link. […]

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