SWMM 5 or 5.0 Blog

Link Iterations in the SWMM 5 Dynamic Wave Solution

noreply@blogger.com (Robert Dickinson) — Sun, 27 May 2012 01:24:00 +0000

Subject: Link Iterations in the SWMM 5 Dynamic Wave Solution

Each of the links in the SWMM 5 network can use up to 8 iterations to reach convergence during a time step in the dynamic wave solution of SWMM 5. The rules governing the number of iterations are:

1. A minimum of 2 iterations per time step with the 1^st iteration NOT using the underrelaxtion parameter of 0.5 (Figure 1)

2. If both the downstream and upstream nodes are converged then the link drops out of the iteration process during the time step (Figure 2)

3. The number of iterations for each link can vary over the simulation from 2 to 8 depending on how fast the flow is changing.

Figure 1. A minimum of two and up to eight iterations per time step in the SWMM 5 dynamic wave solution.

Figure 2. The number of iterations for each link vary through out the simulation with less iterations being used for constant flows.

How is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5?

noreply@blogger.com (Robert Dickinson) — Sat, 26 May 2012 22:08:00 +0000

Subject: How is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5?

An explanation of the four St. Venant Terms in SWMM 5 and how they change for Gravity Mains and Force Mains. The HGL is the water surface elevation in the upstream and downstream nodes of the link. The HGL for a full link goes from the pipe crown elevation up to the rim elevation of the node + the surcharge depth of the node. The four terms are:

dq2 = Time Step * Awtd * (Head Downstream – Head Upstream) / Link Length or

dq2 = Time Step * Awtd * (HGL) / Link Length

Qnew = (Qold – dq2 + dq3 + dq4) / ( 1 + dq1)

when the force main is full dq3 and dq4 are zero and

Qnew = (Qold – dq2) / ( 1 + dq1)

The dq4 term in dynamic.c uses the area upstream (a1) and area downstream (a2), the midpoint velocity, the sigma factor (a function of the link Froude number), the link length and the time step or

dq4 = Time Step * Velocity * Velocity * (a2 – a1) / Link Length * Sigma

the dq3 term in dynamic.c uses the current midpoint area (a function of the midpoint depth), the sigma factor and the midpoint velocity

dq3 = 2 * Velocity * ( Amid(current iteration) – Amid (last time step) * Sigma

dq1 = Time Step * RoughFactor / Rwtd^1.333 * |Velocity|

The weighted area (Awtd) is used in the dq2 term of the St. Venant equation:

dq2 = Time Step * Awtd * (Head Downstream – Head Upstream) / Link Length

The four terms change at each iteration and time step to determine the new flow (Figure 1) based on the two equations:

Denom = 1 + dq1 + dq5

Q = [Qold – dq2 + dq3 + dq4] / Denom

If you look at a table of the values you will see that the terms add up to zero when the flow is constant and to delta Q or the change in Q when the flow is NOT constant (Figure 2).

Figure 1. The four terms define the new flow at each iteration in the dynamic wave solution of SWMM5

Figure 2. The magnitude of the four terms determine the flow at the new iteration and ultimately the new Time Step. If the flow is constant then the value of the term is constant.

SWMM 5 Precipitation Options

noreply@blogger.com (Robert Dickinson) — Sat, 26 May 2012 16:04:00 +0000

Subject: SWMM 5 Precipitation Options

You can have design storms, monitored storms of any length of the time from minutes to centuries, use intensity, volume or cumulative precipitation, use both rainfall and snowfall in the same rain gage depending on temperature, use both time series or external files for the rain gage and have unlimited rain gages with the limitation of one rain gage per subcatchment.

See the full gallery on Posterous

SWMM 5 Leaping Weir Example

noreply@blogger.com (Robert Dickinson) — Thu, 24 May 2012 13:18:00 +0000

Subject: SWMM 5 Leaping Weir Example

The attached example shows one way how SWMM 5 RTC Rules can be used to have the low flow go down a leaping weir orifice and the high flow go over the weir to the downstream section of the sewer.

leaping_weir.INP Download this file

Force Main Friction Loss in InfoSWMM and the Transition from Partial to Full Flow

noreply@blogger.com (Robert Dickinson) — Thu, 24 May 2012 12:52:00 +0000

Subject: Force Main Friction Loss in InfoSWMM and the Transition from Partial to Full Flow
You can model Force Main friction loss in InfoSWMM using either Darcy Weisbach or Hazen Williams as the full pipe friction loss method (see Figure 1 for the internal definition of full flow). A function called ForceMain in InfoSWMM whose purpose is to compute the Darcy-Weisbach friction factor for a force main using the Swamee and Jain approximation to the Colebrook-White equation . No matter which method you use for full flow the program will use Manning’s equation to calculate the loss in the link when the link is not full (see Figure 2 for the equations used for calculating the friction loss – variable dq1 in the St Venant equation for InfoSWMM). The regions for the different friction loss equations are shown in Figure 3.

There is no slot in InfoSWMM for the full pipe flow as a surcharged node in InfoSWMM uses this point iteration equation (Figure 4):

dY/dt = dQ / The sum of the Connecting Link values of dQ/dH

where Y is the depth in the node, dt is the time step, H is the head across the link (downstream – upstream), dQ is the net inflow into the node and dQ/dH is the derivative with respect to H of the link St Venant equation. If you are trying to calibrate the surcharged node depth, the main calibration variables are the time step and the link roughness:

1.   Mannings’s N
2.   Hazen-Williams or
3.   Darcy-Weisbach

The link roughness is part of the term dq1 in the St Venant solution and the other loss terms are included in the term dq5. You can adjust the roughness of the surcharged link to affect the node surcharge depth.   The point iteration continues until the sum of the flow in the node is zero – basically the new depth in the node either increases or decreases the friction loss in the force main so that net flow at the node is zero. This is why it is important to use the right time step to ensure that the net flow is zero when the pumps turn on and off.

Figure 1. How the full pipe condition is defined in InfoSWMM - both ends have to be full

Figure 2: Friction equations used in SWMM 5 for a Force Main.

Figure 3: Regions of Friction loss equations in SWMM 5.

Figure 4. The Node Surcharge Equation is a function of the net inflow and the sum of the term dQ/dH in all connecting links. Generally, as you increase the roughness the value of dQ/dH increases and the denominator of the term dY/dt = dQ/dQdH increases.

Registration and Call for Papers Announced for Innovyze European User Conference 2012

noreply@blogger.com (Robert Dickinson) — Tue, 22 May 2012 16:05:00 +0000

Registration and Call for Papers Announced for Innovyze European User Conference 2012 Key Industry Event for European Modeling Professionals Confirmed for September 19-20, 2012. More information and registration at www.watermodeling.com

Broomfield, Colorado USA, May 22, 2012 — Innovyze, a leading global innovator of wet infrastructure modeling and simulation software and technologies, today announced the opening of registration and call for papers for the Innovyze European User Conference 2012. The premier event for the digital utility and smart water modeling community will be held September 19-20, 2012, at the Hilton Metropole, Birmingham, United Kingdom. This once-a-year learning opportunity for Innovyze’s European users will feature powerful technical presentations showcasing projects from throughout the region, along with keynote addresses from industry leaders and captains of the smart water modeling industry. Sponsorship packages are available and committed sponsors already include Applied Computing, Clear Environmental Consultants, EnginSoft UK, Hydro International, Onsite, Primayer, and Richard Allitt Associates. This year’s conference consists of three overlapping tracks, with Drainage and Flooding across both days of the conference, and Water Supply and Asset Management each with a dedicated day. All delegates, regardless of track, are invited to attend the conference dinner, a key networking opportunity held at the end of the first day of the event. More details on the agenda are available at www.watermodeling.com. The interactive forum will provide valuable industry insights and an opportunity to exchange cutting-edge information, thought-leadership skills, proven strategies, cost-effective solutions and best practices with water and wastewater industry movers and shakers. It will also allow water and wastewater professionals to explore new ways of using engineering-GIS technology as well as advanced analytics and smart water modeling, asset management and information management applications. Participants will learn how they can leverage these tools to do their jobs better, easier, faster and more efficiently; maximize their return on software investments; and make their organizations more globally competitive. Andrew Brown, Innovyze Director of International Operations, noted, “The conference is a fantastic opportunity for Innovyze software users from the region to gather together. Attendees will learn about new product features, get ‘tips and tricks’ for optimum software use, and hear about practical applications of Innovyze products from other users.” To complement the presenters and speakers already confirmed, the organizing committee is seeking relevant presentations. Interested speakers can visit http://www.watermodeling.com/ for submission details. Topics for consideration include: Drainage and Flooding Flood & Water Management Act Surface water management plans (SWMPs) The Water Framework Directive The short and long term needs in the drainage and flooding sector The challenges for urban drainage practitioners in AMP5 Public sector responsibility of implementing and delivering SWMPs Flooding and unauthorized intermittent discharges (UIDs) Catchment growth, changing weather patterns and emerging legislation Integrated solutions including integrated catchment management and water cycle planning Population growth, planning and development Water Supply Reducing a network’s carbon footprint Using transient analysis for optimum system design and protection Developing, calibrating and validating water quality models Efficiently operating and managing water distribution systems Optimizing capital improvement programs Using network modeling for regulatory compliance Pressure and leakage management Asset Management Capital Planning Operational Planning Transfer of Work Orders to Contractors Floods and Water Management Act – Asset mapping and maintenance. Data Management Reporting and Annual Data Submission “This unique event gives our European users an exceptional forum for exploring the state of the art in smart water and wastewater infrastructure engineering and management, and for sharing best practices in solving everyday challenges and problems,” said Brown. “Attendees can transfer this valuable learning experience directly back to their day-to-day projects, opening new and innovative avenues for improving the world’s wet infrastructure.” Additional Information For more information on this year’s conference, to submit a conference abstract or to request sponsorship details, please visit http://www.watermodeling.com/. Delegate registration is now open, with the cost for the two-day event starting at £150 + VAT for Innovyze customers

Dry lands getting drier, wet getting wetter: Earths water cycle intensifying with atmospheric warming

noreply@blogger.com (Robert Dickinson) — Tue, 22 May 2012 10:42:00 +0000

Dry lands getting drier, wet getting wetter: Earths water cycle intensifying with atmospheric warming

http://www.sciencedaily.com/releases/2012/05/120521104631.htm

May 21, 2012

ScienceDaily (May 21, 2012) — A clear change in salinity has been detected in the world's oceans, signalling shifts and an acceleration in the global rainfall and evaporation cycle.

In a paper just published in the journal Science, Australian scientists from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Lawrence Livermore National Laboratory, California, reported changing patterns of salinity in the global ocean during the past 50 years, marking a clear fingerprint of climate change.

Lead author, Dr Paul Durack, said that by looking at observed ocean salinity changes and the relationship between salinity, rainfall and evaporation in climate models, they determined the water cycle has strengthened by four per cent from 1950-2000. This is twice the response projected by current generation global climate models.

"Salinity shifts in the ocean confirm climate and the global water cycle have changed.

"These changes suggest that arid regions have become drier and high rainfall regions have become wetter in response to observed global warming," said Dr Durack, a post-doctoral fellow at the Lawrence Livermore National Laboratory.

With a projected temperature rise of 3ºC by the end of the century, the researchers estimate a 24 per cent acceleration of the water cycle is possible.

Scientists have struggled to determine coherent estimates of water cycle changes from land-based data because surface observations of rainfall and evaporation are sparse. However, according to the team, global oceans provide a much clearer picture.

"The ocean matters to climate -- it stores 97 per cent of the world's water; receives 80 per cent of the all surface rainfall and; it has absorbed 90 per cent of the Earth's energy increase associated with past atmospheric warming," said co-author, Dr Richard Matear of CSIRO's Wealth from Oceans Flagship.

"Warming of the Earth's surface and lower atmosphere is expected to strengthen the water cycle largely driven by the ability of warmer air to hold and redistribute more moisture."

He said the intensification is an enhancement in the patterns of exchange between evaporation and rainfall and with oceans accounting for 71 percent of the global surface area the change is clearly represented in ocean surface salinity patterns.

In the study, the scientists combined 50-year observed global surface salinity changes with changes from global climate models and found "robust evidence of an intensified global water cycle at a rate of about eight per cent per degree of surface warming," Dr Durack said.

Dr Durack said the patterns are not uniform, with regional variations agreeing with the 'rich get richer' mechanism, where wet regions get wetter and dry regions drier.

He said a change in freshwater availability in response to climate change poses a more significant risk to human societies and ecosystems than warming alone.

"Changes to the global water cycle and the corresponding redistribution of rainfall will affect food availability, stability, access and utilization," Dr Durack said.

Dr Susan Wijffels, co-Chair of the global Argo project and a co-author on the study, said maintenance of the present fleet of around 3,500 profilers is critical to observing continuing changes to salinity in the upper oceans.

The work was funded through the Australian Climate Change Science Program, a joint initiative of the Department of Climate Change and Energy Efficiency, the Bureau of Meteorology and CSIRO.

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The above story is reprinted from materials provided by CSIRO Australia.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.

Journal Reference:

P. J. Durack, S. E. Wijffels, R. J. Matear. Ocean Salinities Reveal Strong Global Water Cycle Intensification During 1950 to 2000. Science, 2012; 336 (6080): 455 DOI: 10.1126/science.1212222

Upcoming Conferences, User Groups, Seminars and Webinars

noreply@blogger.com (Robert Dickinson) — Thu, 17 May 2012 15:35:00 +0000

Upcoming Conferences, User Groups, Seminars and Webinars

In the coming months Innovyze will be running a range of events world-wide that we believe will greatly benefit you as an existing or potential user of our software solutions. We hope you will be able to join us at one or more of the events listed below.
We also invite you to check out the latest posts and videos on the Innovyze Insider Blog, and our latest press releases.

Join us for a Regional User Group Meeting in Atlanta
Atlanta, GA, USA - May 23, 2012
This Regional User Group Meeting is hosted by City of Atlanta Department of Watershed Management. Learn about new products and features and network with local users from utilities and consulting firms. The event is free of charge and is designed for experienced, new or potential users. During the User Group Meeting, you will have the opportunity to network with local users and hear how they are improving their workflow, completing projects more efficiently and supporting their decision making using Innovyze Products.
To attend this event please register at www.innovyze.com/news/events/atlanta_2012/

Popular InfoWorks ICM Seminar to be Repeated
Birmingham, UK - May 30, 2012
Last December we ran our first InfoWorks ICM Seminar. Combining the best elements of a workshop and a standard training day, this new kind of event aimed to give attendees a firm foundational understanding of InfoWorks ICM and its best application to their work. Attendees from the previous seminar told us that it met their needs well and provided excellent value for money. As a result, we will be holding the event again this month, on Wednesday, May 30, 2012.
Download further information and booking form

Register Now for 2012 Asia Pacific Water and Sewer Systems
Modeling Conference
Gold Coast, Australia - August 21-22, 2012

The 2012 Asia Pacific Water and Sewer Systems Modelling Conference will bring together world leaders in water and sewer network modeling, network management and optimization, and asset management. Attendees will learn the latest practices, technologies, solutions and regulations in the water/wastewater industries, will network on a global scale and will create valuable relationships with industry peers.
Places are limited, so sign up today at www.asiapacificwater.com/

Call for Papers and Registration Open for Innovyze European
User Conference 2012
Birmingham, UK - September 19-20, 2012
Innovyze would like to invite you to join us for our European User Conference 2012. This annual event is an indispensable opportunity for users of Innovyze’s range of products to hear about the very latest advances to the software, learn how others are using it and to gain insight into future advances in the industry.
To register for this event, to submit a paper and for more information please visitwww.watermodelling.com

Modeling and Eliminating Transients in Water Distribution Systems with InfoSurge
Webinar - Tuesday, May 22, 2012 1:00pm EDT
Unidirectional flushing (UDF) is the most effective way of cleaning water mains and maintaining water quality and system capacity. It also requires the least amount of water of any cleaning method. Valves are closed and hydrants opened to create a one-way flow that accelerates the speed of water in the mains, maximizing shear velocity near the pipe wall and producing a scouring action that effectively removes sediment deposits and biofilm. Learn how the automated design tools in InfoWater UDF, allow engineers to create these flushing sequences in record time.
Sign up for this and other webinars at www.innovyze.com/education/webinars/

View all Innovyze Events

May 17, 2012

Innovyze Insider Blog

InfoSWMM Import and Export from SWMM 5 – Video
Innovyze at CIWEM/WaPUG Spring Meeting
Geoplan Themes in InfoWorks ICM – Video Tutorials
Improving the Performance of Critical Link Analysis in InfoWorks WS

View the Innovyze Insider Blog

Recent Press Releases

Innovyze Releases InfoMaster Sewer; Next Generation Analytics-Centric Asset Management for Smart Water Networks for Digital Utilities
City of Delray Beach Selects InfoWater as its Smart Water Network Modeling Solution
City of Corpus Christi, Texas, Chooses CapPlan Water for Smart Capital Planning
Innovyze President Receives ACOPNE’s Highest Honor

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Innovyze Releases InfoMaster Sewer; Next Generation Analytics-Centric Asset Management for Smart Water Networks for Digital Utilities

noreply@blogger.com (Robert Dickinson) — Tue, 15 May 2012 23:22:00 +0000

Innovyze Releases InfoMaster Sewer; Next Generation Analytics-Centric Asset Management for Smart Water Networks for Digital Utilities Groundbreaking Release Leverages ArcGIS, Advanced Analytics and iOS Mobile Technology, Setting New Standard for Collection System Optimization and Regulatory Compliance

Broomfield, Colorado USA, May 15, 2012 — Innovyze, a leading global innovator of business analytics software and technologies for wet infrastructure, today announced the worldwide release of InfoMaster Sewer for the enterprise management and analysis of sewer collection system data. The InfoMaster product suite provides critical insight to all utility enterprise assets, their conditions and work processes, for better planning and control. It lets utilities use information and analytics in new ways to drive higher productivity and quality, while managing costs and increasing operational flexibility. It is available exclusively for the Esri (Redlands, CA) ArcGIS 10 platform and includes components to run on the desktop, web, tablet, and smartphone environments. InfoMaster revolutionizes the business analytics and optimization (BAO) industry for water and wastewater utilities with its “out-of-the-box” approach to geospatial wet infrastructure asset management, a distinct point of differentiation from traditional enterprise resource planning (ERP) solutions. The typical enterprise software deployment requires a 12- to 18-month implementation cycle, but InfoMaster can be deployed in just a day to a few weeks — creating a never before opportunity for small to medium sized utilities to optimize network management at a very low cost. Where other ERP systems are focused on electronic records management,InfoMaster is built from the ground up to provide superior business analytics and modeling capabilities. This unique offering allows utilities to manage and control for the first time both the flow of data and the flow of water for better, faster and more accurate decision making. And because InfoMaster allows data to be organized by project, a single BAO package can now be utilized by both the utility and its engineering consultants with enormous flexibility to manage data for multiple utilities. “Wastewater utilities have struggled with limited budgets and reduced staffing and in order to maintain quality standards and efficiencies require an empowered workforce. InfoMaster provides the real time power to manage a 24/7 operation at every level of the organization,” said wet infrastructure asset management and finance expert Gregory Baird. “When time is money, the high speed implementation cycle demonstrates the ease of the mobile application while leveraging the utilities investment in Esri's ArcGIS. The ArcGIS geodatabase as the repository is the key with the biggest ROI. Esri's interoperability combined with Innovyze's mastery of data analytics and reporting, enhances work order maintenance management systems and infrastructure asset management programs.” With InfoMaster Sewer a utility can manage its entire underground infrastructure directly from the Esri geodatabase. Because any analysis is only as strong as its underlying data, InfoMaster includes direct support for pipes, manholes, pump stations, closed circuit television (CCTV) inspections, manhole inspections, smoke testing, customer incidents, and other field activities. Data can be read directly from an enterprise geodatabase, imported or linked to third-party ERP systems, or entered directly through the desktop, web, or its companion smartphone or tablet applications. Also released are InfoMaster FieldWork and InfoMaster FacilityWatch, two easy-to-use, easy-to-implement mobile apps designed specifically for onsite inspections and investigations. These iPhone and iPad applications connect directly to the InfoMaster server and ensure secure mobile (connected or disconnected) access to enterprise asset management data and maps for entry, viewing, and updating. Each application can be customized by an administrator for maximum efficiency and flexibility. In addition, InfoMaster FacilityWatch can be configured to allow access by the general public, enabling utility customers to submit an incident directly to the utility from their preferred mobile device. Mobile inspectors using the apps on their iPhones or iPads can complete onsite inspections—from initial log-in to submittal—and also can view and update their inspection details. The apps prevent remote data loss in areas with limited or no cellular service by saving all work locally to the device and seamlessly submitting the information when a connection is available. InfoMaster Sewer analysis tools are unparalleled in the industry, giving utilities the ability to validate and then “slice and dice” virtually any piece of data. Armed with clean data, a utility can use InfoMaster tools and wizards to move nimbly to optimize operations. Sample applications include establishing a prioritized capital replacement plan based on inspection data from pipeline assessment and manhole assessment certification programs (PACP and MACP); reducing the number of “hotspot” cleaning activities by comparing current cleaning schedules to upstream blockage complaints reported; and overlaying smoke testing defects reported in real time through an iPhone with Bing (Microsoft, Redmond, WA) aerial maps to facilitate identification of older houses with cross connections. “We continue to move up the technology stack into the highly innovative, high-growth business analytics and optimization (BAO) space, setting new standards in smart water networks and for the digital water utility,” said Paul F. Boulos, Ph.D., BCEEM, Hon.D.WRE, Dist.D.NE, F.ASCE. “With InfoMaster, we have added a very powerful and flexible business-critical decision support tool for water and wastewater utilities worldwide, giving our customers the broadest, deepest and most integrated product offerings in our 15-year history. This breakthrough technology uses geospatial and real-time data and advanced mathematical, modeling and optimization tools to help utility owner-operators find problem areas in their water and wastewater systems, solve infrastructure issues, help prioritize projects and investment requirements, enhance security and operations, and optimize business performance. It can be effectively used in all phases of the asset lifecycle from early detection and assessment of risks to long range budgeting and planning. Our mission is to help customers solve their business challenges and produce the best, most innovative solutions. With our support, they can aim high and deliver — consistently.”

Saving an Output Relate in InfoSWMM directly to Excel using Arc Tool Box

noreply@blogger.com (Robert Dickinson) — Mon, 14 May 2012 19:15:00 +0000

Subject: Saving an Output Relate in InfoSWMM directly to Excel using Arc Tool Box

The following shows how to make an Excel file directly from a feature table in InfoSWMM

Step 1. Download the Arc Tool box add on Table to Excel

You can download the python script from here http://resources.arcgis.com/gallery/file/geoprocessing/details?entryID=95009B25-1422-2418-7FB5-B8638ECB2FA9

Step 2. Add the Tool to Arc Toolbox and then use the tool to create an Excel CSV File

Step 3. You can export any of the features in InfoSWMM to CSV

Example DUPUIT-FORCHHEIMER APPROXIMATION FOR SUBSURFACE FLOW Model in SWMM 5

noreply@blogger.com (Robert Dickinson) — Sun, 13 May 2012 15:22:00 +0000

Subject: Example DUPUIT-FORCHHEIMER APPROXIMATION FOR SUBSURFACE FLOW Model in SWMM 5

This example was created from an older SWMM 4 model from 1988 using the SWMM 4 to SWMM 5 converter. The values for the coefficients in this case are A1 = A3 = 4*K/L^2, A2 = 0, B1 or the exponent or B1=2 or from Appendix X in the SWMM 4 manual from OSU (http://eng.odu.edu/cee/resources/model/mbin/swmm/swmm_6.pdf)

See the full gallery on Posterous

DUPUIT-FORCHHEIMER_APPROXIMATI.inp Download this file

Example Groundwater Model in SWMM 5

noreply@blogger.com (Robert Dickinson) — Sun, 13 May 2012 01:44:00 +0000

Subject:   Example Groundwater Model in SWMM 5

The attached model shows three ways in which the groundwater model of the SWMM 5 subcatchments interact with the node depths of the hydraulic network. The hydraulic network interaction can be either:
1.       At a fixed water surface elevation,
2.       At a time varying water surface elevation based on the inflow and geometry of the node and
3.       At a threshold node water surface elevation.

See the full gallery on Posterous

GW_INTERACTION.inp Download this file

Example SWMM 5 Snowmelt Model

noreply@blogger.com (Robert Dickinson) — Sat, 12 May 2012 22:10:00 +0000

Subject: Example SWMM 5 Snowmelt Model

Attached is a simple sample snowmelt model in SWMM 5 that has built in snowfall and temperature in a one subcatcment model with snowmelt. You define the separation of precipitation into snowfall and rainfall by setting a base temperature in the Snow Pack Editor. The precipitation that falls with when the air temperature is below the base temperature is stored in a snow pack where it eventually will melt when the temperature rises or is moved via plowing. You can have an initial snow cover, final snow cover and runoff from the melting snow long after the snowfall occurs.

See the full gallery on Posterous

small_snowmet_example.inp Download this file

My History with Various Versions of SWMM: SWMM3, SWMM4, SWMM5, XP-SWMM and InfoSWMM

noreply@blogger.com (Robert Dickinson) — Sun, 06 May 2012 17:42:00 +0000

Subject:   My History with Various Versions of SWMM: SWMM3, SWMM4, SWMM5, XP-SWMM and InfoSWMM

I first learned about SWMM in a brochure from the University of Florida when I was just a 17 year old senior in High School. Water resources and the description of SWMM seemed to be worthy career goals at the time and I have been extremely lucky to have the opportunity to work and develop many SWMM related products in my working life.   I am especially proud that SWMM 3, SWMM 4 and SWMM 5 are both public domain and open source software. You can open up and look at the code and add features and internal tests on your own. You can customize the input and output of SWMM 5 if you want to but most importantly you have direct access to the source code so you can verify the computational algorithms.

InfoSWMM is an Arc GIS extension that works in Arc Map but we at Innovyze are proud that we have superb import and export features to SWMM 5 from Arc Map and use the SWMM 5 engine as our engine solution. You can look at the internal workings of the InfoSWMM engine by downloading the current SWMM 5 C code from the EPA website http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/   InfoSWMM also has all of the Arc GIS programming tools, Python programming, editing and drawing features and Table of Contents attribute features to make a better model but that model will still use the open source SWMM 5 engine inside of InfoSWMM.    When you use InfoSWMM you are using the SWMM 5 engine but with many extra input and output features to help prepare the data for the current SWMM 5 engine and analyze the SWMM 5 engine output in maps, tables and graphs.

Best Regards,
Robert Dickinson

Runoff Routing Options Example in SWMM 5

noreply@blogger.com (Robert Dickinson) — Sun, 06 May 2012 05:41:00 +0000

Subject:   Runoff Routing Options Example in SWMM 5

There are six options for runoff routing in SWMM 5:

·         All Runoff to an Outlet Node
·         All Runoff to another Subcatchment
·         All Runoff to the Pervious Area of the Subcatchment or other Subcatchment
·         All Runoff to the Impervious Area of the Subcatchment or other Subcatchment
·         Partial Runoff to the Pervious Area of the Subcatchment or other Subcatchment
·         Partial Runoff to the Impervious Area of the Subcatchment or other Subcatchment

The attached example SWMM 5.0.022 file has three catchments in a chain, the 1^st Subcatchment Routes to the Pervious area of the 2^nd Subcatchment and the 2^nd Subcatchment routes the runoff to the Impervious area of the 3^rd Subcatchment which routes all runoff to an outlet node.

RunoffRoutingOptions.inp Download this file

Example FM SWMM 5 model with and without Surcharge Depth

noreply@blogger.com (Robert Dickinson) — Sat, 05 May 2012 21:56:00 +0000

Subject: Example FM SWMM 5 model with and without Surcharge Depth

You need to use the surcharge depth for a Force Main in SWMM 5 to allow the engine to find the right point on the pump curve and pump up the rising main. If you do not use a surcharge depth then the flow MAY be very small in the rising main due to a small head difference. Of course the flow in the force main depends on the pump curve you have entered but having the right downstream head of depth for the link matter as well. The attached model was created in SWMM 5.0.022

fm_storage.inp Download this file

How to Edit the Subcatchment Polygons in InfoSWMM with Arc Map

noreply@blogger.com (Robert Dickinson) — Wed, 25 Apr 2012 22:14:00 +0000

Subject: How to Edit the Subcatchment Polygons in InfoSWMM with Arc Map

You can edit the polygon boundaries of the Subcatchments in Arc GIS by using the Editor command and either editing the vertices or by using the Reshape Feature Tool to adjust the boundaries or snap to the polygon lines or vertex points. You should start the editing session by right mouse clickining on the Subcatchment Feature layer

Vertex Editing and Reshape Feature Tool

See the full gallery on Posterous

Average Residence time in InfoSWMM and H2OMAP SWMM

noreply@blogger.com (Robert Dickinson) — Wed, 25 Apr 2012 22:13:00 +0000

Subject: Average Residence time in InfoSWMM and H2OMAP SWMM
Here is one way to estimate the residence time:

1. Plot the System Outflow and Storage in the InfoSWMM Report Manager

2. Click on the Report Button and copy the Outflow and Storage Time Series

3. Paste to Excel

4. Calculate the Residence time as Storage / Outflow and Graph

5. You will have an understanding of the residence time in your network

6. If you have a dry weather flow then a hot start file will give a better estimate at the start of the simulation

Innovyze President Receives ACOPNE’s Highest Honor

noreply@blogger.com (Robert Dickinson) — Tue, 24 Apr 2012 17:39:00 +0000

Dr. Paul F. Boulos Named Distinguished Diplomate in Navigation Engineering by the ASCE Academy of Coastal, Ocean, Port & Navigation Engineers

Innovyze President Receives ACOPNE’s Highest Honor

Broomfield, Colorado USA, April 24, 2012 — The Board of Trustees of the Academy of Coastal, Ocean, Port & Navigation Engineers (ACOPNE) has awarded Innovyze President Dr. Paul F. Boulos Distinguished Diplomate status in Navigation Engineering (Dist.D.NE), the academy’s highest honor. As a recipient of this award, Dr. Boulos joins an elite group of 23 diplomates worldwide with this distinction. Dr. Boulos will be presented this signal award at a special induction ceremony and reception to be held during the Dredging 2012 conference in San Diego, California, October 22-25. ACOPNE is an affiliate of the American Society of Civil Engineers (ASCE). Dredging 2012 is a four-day technical specialty conference organized by PIANC USA and the Coasts, Oceans, Ports and Rivers Institute of American Society of Civil Engineers (COPRI ASCE).

Dr. Boulos is one of the world’s foremost experts on water resources and navigation engineering. He has won numerous industry honors, including notable technical awards from ASCE, the American Water Works Association and the U.S. Environmental Protection Agency, and was inducted into the University of Kentucky College of Engineering Hall of Distinction, the most prestigious honor given by the university to its alumni. His publications include nine authoritative books and more than 100 scholarly papers. He is a Fellow of the American Society of Civil Engineers (F.ASCE), a Board Certified Environmental Engineer (by eminence) of the American Academy of Environmental Engineers (BCEEM), and an Honorary Diplomate of Water Resources Engineering (Hon.D.WRE) of the American Academy of Water Resources Engineers (AAWRE), the academy’s highest honor. He graduated with a Bachelor of Science degree in General Science from the Lebanese American University (Beirut, Lebanon) and was named the university’s 2008 Alumnus of the Year for his extraordinary professional achievement. Dr. Boulos also received a Doctorate, Master of Science and Bachelor of Science with distinction in Civil Engineering from the University of Kentucky in Lexington and has completed the Advanced Management Program at Harvard Business School.
“I am deeply humbled and honored to be selected for this distinguished award,” said Boulos. “I am so proud to be a part of this noble and great profession and to be able to contribute to its advancement. It’s truly a privilege to receive such special recognition for doing something I deeply love and enjoy — especially when it comes from the men and women I most admire.”
Diplomate status credential recognizes an advanced expertise in the practice of Coastal, Ocean, Port & Navigation Engineering (COPNE). Navigation engineering involves the life cycle planning, design, construction, operation and life maintenance of safe, secure, reliable, efficient and environmentally sustainable navigable waterways (channels, structures and support systems) used to move people and goods by waterborne vessels. Distinguished Diplomate status, ACOPNE’s highest honor, is awarded exclusively to those who have made significant contributions to the COPNE profession. To date, only 23 engineers and practitioners worldwide (eight in navigation engineering) have earned this distinction, a tribute to their exceptional technical and professional leadership within the COPNE community.
“We are proud to honor Dr. Boulos for his eminence, commitment and exceptional contributions to the profession,” said Michael A. Ports, PE, PH, D.WRE, D.NE, BCEE, Principal of Ports Engineering in Jacksonville, Florida, and President of ACOPNE. “He has distinguished himself professionally amongst his peers and demonstrates the characteristics of a role model to his fellow engineers and to the members of the community. We thank and congratulate him for his lifetime of achievements, tireless efforts, and advocacy for the advancement of research and best practices in navigation engineering.”
For more information on ACOPNE, visit www.acopne.org.
About Innovyze
Innovyze is a leading global provider of wet infrastructure business analytics software solutions designed to meet the technological needs of water and wastewater utilities, government industries, and engineering organizations worldwide. Its clients include the majority of the largest UK, Australasian, East Asian and North American cities, foremost utilities on all five continents, and ENR top-rated design firms. With unparalleled expertise and offices in North America, Europe, and Asia Pacific, the Innovyze connected portfolio of best-in-class product lines empowers thousands of engineers to competitively plan, manage, design, protect, operate and sustain highly efficient and reliable infrastructure systems, and provides an enduring platform for customer success. For more information, call Innovyze at +1 626-568-6868, or visit www.innovyze.com.

Example Dual Drainage SWMM 5 model

noreply@blogger.com (Robert Dickinson) — Sat, 21 Apr 2012 23:31:00 +0000

Topic: Example Dual Drainage SWMM 5 model

dual_drainage.inp Download this file

Swmm-online-com

noreply@blogger.com (Robert Dickinson) — Sat, 21 Apr 2012 17:14:00 +0000

Topic: Sam Shamsi and swmm-online-com

Sam as an interesting blog or web page with other GIS and SWMM links including his well known annual Top 10 list about various Stormwater modeling subjects. The link is
http://sites.google.com/site/shamsigisapplications/3-my-web-sites/swmm-online-com

The Pump summary table of SWMM5.0.022 and the Percent Time off Columns

noreply@blogger.com (Robert Dickinson) — Sat, 14 Apr 2012 23:19:00 +0000

Subject: The Pump summary table of SWMM5.0.022 and the Percent Time off Columns

The pump summary table at the end of the SWMM 5 report file has two columns for the time off the pump curve BUT the two columns are only informative if the pump is a type 4 pump. If the pump type is 1, 2 or 3 then the low column is always 0 and when the volume, depth or head is either below the lowest point in the point curve or above the highest point in the pump curve the pump summary table lists the time off either low or high in the High column.

xMin is the 1^st point in the pump curve for either volume, depth, head or depth, respectively for pump1, pump2, pump3 and pump4 type pumps
xMax is the last point in the pump curve for either volume, depth, head or depth, respectively for pump1, pump2, pump3 and pump4 type pumps

Dual Drainage in SWMM 5

noreply@blogger.com (Robert Dickinson) — Fri, 30 Mar 2012 01:38:00 +0000

Subject: Dual Drainage in SWMM 5

The purpose of the Dual Drainage tool in InfoSWMM is to create a major or street drainage network on top of an existing pipe or what is called the minor network in dual drainage. The created major network has a node (sometimes called the inlet node) on top of the existing minor network node connected by two OUTLET links. One outlet link takes the flow from the street and passes it to the minor network node, the second outlet link takes the surcharged minor network flow and passes it to the major network or street – the direction of flow is important (Figure 1). The general purpose of the Captured OUTLET is to use a head or depth equation to separate the street incoming flow into captured flow and bypass flow

Figure 1. Dual Drainage in General

Figure 2. How it looks in SWMM 5 with node, outlet and conduit elements.

Bloomberg: Heat Waves, Rains Probably Linked to Warming, Scientists Say

noreply@blogger.com (Robert Dickinson) — Mon, 26 Mar 2012 14:56:00 +0000

Heat Waves, Rains Probably Linked to Warming, Scientists Say

By Rudy Ruitenberg - Mar 26, 2012 6:23 AM ET

Heat waves and extreme rainfall in the past decade are probably linked to global warming, according to a study by scientists at the Potsdam Institute for Climate Impact Research.

“For some types of extreme, notably heat waves but also precipitation extremes, there is now strong evidence linking specific events or an increase in their number to the human influence on climate,” the scientists wrote in a study published in the journal Nature Climate Change.

The past decade included Europe’s hottest summer in at least 500 years in 2003, according to the scientists. 2010 brought western Russia’s hottest summer in centuries and record rain in Pakistan and Australia, they wrote. Japan and some U.S. states registered all-time-high rainfall last year, while the Yangtze River basin in China had a record drought.

Basic physics exercises suggest that warming of the atmosphere leads to more extremes, according to the institute. For example, warm air can hold more moisture that may fall as rain, the scientists wrote. Computer simulations confirm the relation between warming and record temperatures and rainfall, the study showed.

The recent high incidence of weather records is “no longer normal,” according to Dim Coumou, the lead author of the study.

To contact the reporter on this story: Rudy Ruitenberg in Paris at rruitenberg@bloomberg.net

To contact the editor responsible for this story: Claudia Carpenter atccarpenter2@bloomberg.net

How to Make a SWMM 5 Calibration File from InfoSWMM

noreply@blogger.com (Robert Dickinson) — Tue, 20 Mar 2012 15:39:00 +0000

Subject: How to Make a SWMM 5 Calibration File from InfoSWMM

1^st Step: Graph a Link in InfoSWMM using the Date /Time Format

2^nd Step: Click on the Report Button and copy the 1^st two columns of data

3^rd Step: Save the copied columns to a data file, replace the semi colon and add the name of the link to the top of the data file as shown below

4^th Step: Connect the created calibration data file t o the SWMM 5 Calibration Data Link Flow Rate

5^th Step: Run the Simulation and you should see two graphs on the screen for the designated link