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Showing posts from January, 2012

North Carolina City Chooses InfoSewer

North Carolina City Chooses InfoSewerArcGIS Based Sewer Modeling Package Helps Hendersonville, NC Model and Manage Its Collection SystemBroomfield, Colorado, USA, January 31, 2012Innovyze, a leading global innovator of business analytics software and technologies for wet infrastructure, today announced the City of Hendersonville, North Carolina, has selected InfoSewer for ArcGIS (Esri, Redlands, CA) as its sewer modeling platform. InfoSewer has helped define the standard in the industry for GIS-centric sewer network analysis, planning and design since 2003.
The City of Hendersonville’s Water and Sewer Department is responsible for providing water service to more than 62,000 residents and businesses of Hendersonville and Henderson County and sewer service to more than 19,000 residents and businesses. The Department is also responsible for the operation and maintenance of over 580 miles of water mains, 57 water pumping stations, 24 water storage tanks (ranging in size from 100,000 gallo…

Philadelphia and Green Infrastructure

Changing the rules in the middle of the game: Philadelphia's green infrastructure Category:Water
Posted on: January 18, 2012 4:14 PM, byLiz Borkowski
Philadelphia and Green Infrastructure
Aging US water infrastructurehas meant more leaks, flooded basements, and massive sinkholes in cities across the US. Fixing the water and sewer systems in need of repair will take billions of dollars, and it's hard to find that kind of money in the budget these days.
Saqib Rahim reports for ClimateWireon Philadelphia's decision to use "green infrastructure" rather than building a larger pipe system to handle the water that's dumped on the city during severe storms. The combination of more intense storms and more paved area is a problem: Impervious surfaces like roads, sidewalks, and parking lots can't absorb rainfall, so it ends up in the city's stormwater collection system -- which, in many older cities, is combined with the sewage system. When these combined systems ar…

Example SWMM 5 Model for Activated Sludge

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Note:   Example SWMM 5 Model for Activated Sludge
Example SWMM 5 Model for Activated Sludeby dickinsonre
Note:   Example SWMM 5 Model for Activated Sludge Here is one example of how to model an activated sludge tank.  The image is Wikipedia (http://en.wikipedia.org/wiki/Activated_sludge)  and is the watermark background in the SWMM 5 GUI.  There is 100 lps inflow, 20 percent recycle and 10 percent sludge drawoff.   You can adjust the amount of recycle and sludge altering the pump type 2 flows or if you want to increase the inflows – add more flow in the RawWater inflow node.
via Blogger http://www.swmm5.net/2013/08/example-swmm-5-model-for-activated-slude.html

Three Flow Divider Link Example in SWMM 5

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Subject:  Three Flow Divider Link Example in SWMM 5
Three Flow Divider Link Example in SWMM 5by dickinsonreSubject:Three Flow Divider Link Example in SWMM 5 You can have more than 2 downstream OUTLET Type links in the SWMM 5 dynamic wave solution.  Each link, Under5, Over5 and ReturnFlow is an OUTLET Link with a rating curve depth/flow table.  Depending on the depth in the storage node DIVIDER, the flow is computed from the table for links Under5, Over5 and Return Flow.
via Blogger http://www.swmm5.net/2013/08/three-flow-divider-link-example-in-swmm.html

Output Statstics Manager to find negative flows in InfoSWMM

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Subject:  Output Statstics Manager to find negative flows in InfoSWMM
Output Statstics Manager to find negative flows in InfoSWMMby dickinsonreubject:  Output Statstics Manager to find negative flows in InfoSWMM
Output Statstics Manager to find negative flows with these parameters:
1.       Pipe Features 2.       Use a Domain with your force mains 3.       Select Flow 4.       Event Dependent 5.       Total – NOT Mean or Peak to  find the negative and positive flows 6.       Large NEGATIVE Flow Threshold 7.       Large NEGATIVE Volume Threshold 8.       Zero for Interevent Time to pick up all values 9.       You will get a table that shows you the minimun flows, and a histogram of the flows



via Blogger http://www.swmm5.net/2013/08/output-statstics-manager-to-find.html

Flow Dividers in SWMM 5 Dynamic Routing

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Note:  Flow Dividers in SWMM 5 Dynamic Routing
Flow Dividers in SWMM 5 Dynamic Routingby dickinsonreNote:Flow Dividers in SWMM 5 Dynamic Routing You can  have flow dividers in SWMM 5 dynamic routing by using Storage Nodes for the dividers, OUTLET links for the downstream links and minimizing downstream HGL effects. The needed components are: 1.A Storage Node for the divider node as a OUTLET Link does not have a Surface Area, 2.Two or More OUTLET Links as the downstream diversion and cutoff links, 3.Two or More Rating Curves to divide the flow up based on either depth or head, 4.Pumps, Outfalls or Steep Sloped Links Downstream of the diversion and cutoff links to minimize downstream HGL  effects

via Blogger http://www.swmm5.net/2013/08/flow-dividers-in-swmm-5-dynamic-routing.html

Keep and Dampen options and their effect on the four main terms of the St Venant equation

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Note:  The Keep and Dampen options and their effect on the four main terms of the St Venant equation. 
The Keep and Dampen options and their effect on the four main terms of the St Venant equation in SWMM5by dickinsonreNote:  The Keep and Dampen options and their effect on the four main terms of the St Venant equation. 
The four terms are are used in the new flow for a time step of Qnew:
Qnew = (Qold – dq2 + dq3 + dq4) / ( 1 + dq1) when the force main or gravity 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 where Sigma is a function of the Froude Number and the Keep, Dampen and Ignore Inertial Term Options.  Keep sets Sigma to 1 always and Dampen set Sigma based on the Froude number, Ignore sets Sigma…

Rooftop gardens could solve Singapore's flooding problem

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Rooftop gardens could solve Singapore’s flooding problem
By Tyler Falk | January 18, 2012, 9:09 AM PST
From SmartPlanet

In the last two years, rapid urbanization and changing weather patterns have lead to major flash floods in Singapore.
“[It] can be safely presumed that the weather patterns in Singapore have changed,” said Singapore’s Minister for the Environment and Water Resources last year after a flash flood where in one day Singapore received 77 percent of the amount of rainfall that usually falls in June. “It is very likely that our drainage systems will have to be redesigned to cope with such intense flashes.”
Singapore convened a panel to come up with the best options for dealing with flash floods and stormwater runoff. Their suggestion? Not an overhaul of the drainage system, but rooftop gardens.
Big infrastructure projects are costly and take time to replace. And while the upgrading the drainage system is likely necessary, the panel suggests a quick fix to Singapore: require roof…

Innovyze Surge Line Brings Surge Events to Life With Cutting-Edge Pipe Profile Animations

Innovyze Surge Line Brings Surge Events to Life With Cutting-Edge Pipe Profile AnimationsHigh Quality Animation Gives Engineers Inside View of Model Activities for the First TimeBroomfield, Colorado USA, January 17, 2011 — Innovyze, a leading global innovator of business analytics software and technologies for wet infrastructure, today announced the worldwide release of the SurgeAnimatemodule for its industry-leading surge product line. The breakthrough pipe profile animation module brings a new level of visualization and interpretation power to transient analysis, helping engineers quickly gain a thorough understanding of the complex phenomena occurring within their distribution systems.Available for InfoSurge and InfoWorks TS, the module is ideal for assessing the strength and effectiveness of water supply and distribution systems under a wide range of hydraulic transient conditions, from routine operation to emergency states. It has unprecedented power to help users confidently det…

Surcharged Node and the Link Connection in SWMM 5

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Subject:   Surcharged Node and the Link Connection in SWMM 5 Surcharged Node and the Link Connection in SWMM 5by dickinsonreSubject:   Surcharged Node and the Link Connection in SWMM 5 A surchargednode in SWMM5uses this point iteration equation (Figure 1): 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/dHis 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. Figure 1.  The Node Surcharge Equation is a function of…

HOW MOSQUITOES FLY IN RAIN from 3Quarks

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HOW MOSQUITOES FLY IN RAINMariel Emrich in Talking Science:
Mosquitoes are as adept at flying in rainstorms as under clear skies. But how is that possible? Wouldn’t rain crush a mosquito to the ground since mosquitoes weigh 50 times less than raindrops?
David Hu, an assistant professor of mechanical engineering and biology at the Georgia Institute of Technology, and his graduate research assistantAndrew Dickerson have found that while mosquitoes do get hit by raindrops, they don’t get crushed by them.
Hu discussed their research in a talk at November's APS Division of Fluid Dynamics Meetingthat was entitled “How Mosquitoes Fly in the Rain”.
The researchers measured the impact forces of raindrops on both regular mosquitoes and custom-built mosquito mimics. The mimics were made from small Styrofoam spheres of mosquito-like size and mass. They used high-speed video to capture images of the mosquitoes getting hit with raindrops.
Since the bugs fly so slowly (a maximum of 1 meter per sec…

How to Make Icons and Expand the Toolbars in infoSWMM and InfoSewer

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Subject:  How to Make Icons and Expand the Toolbars in InfoSWMM and InfoSewer
How to Make Icons and Expand the Toolbars in InfoSWMM and InfoSewerby dickinsonreSubject:  How to Make Icons and Expand the Toolbars in InfoSWMM and InfoSewer You can customize the toolbars in InfoSWMM and InfoSewer by clicking on Customize and performing 4 steps: Step 1.  Click on Customize Step 2.  Move the tool from the Command list to the toolbar. Step 3.  Change the Button Image for the Default Style. Step 4.  The Toolbar now has a new Icon for the InfoSWMM command. Step 1.  Click on Customize Step 2.  Move the tool from the Command list to the toolbar. Step 3.  Change the Button Image for the Default Style. Step 4.  The Toolbar now has a new Icon for the InfoSWMM command. via Blogger http://www.swmm5.net/2013/08/how-to-make-icons-and-expand-toolbars.html

How do I correct a fatal error resulting in automatic shutdown in ArcMap?

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Subject:   How do I correct a fatal error resulting in automatic shutdown in ArcMap?
If you cannot open ArcMap, InfoSewer or InfoSWMM at all and get a fatal Esri error the problem may be the file normal.mxt

“If the startup file in ArcGIS Desktop or component applications (e.g., ArcMap, ArcGlobe, ArcScene) is corrupt, a fatal error can occur. Renaming or deleting the existing startup file will often resolve the error. Once the corrupted startup file is removed, ArcGIS will create a new startup file after the application is launched (http://kb.iu.edu/data/asuv.html).”
To remove the startup file in Windows XP for Arc GIS 10 go to the directory C:\Documents and Settings\Your Name\Application Data\ESRI\Desktop10.0\ArcMap\Templates and delete the file Normal.mxt.   You then reopen Arc Map and the normal.mxt file will be recreated and smaller.  You will have to reset the ArcMap toolbars to better control InfoSewer and InfoSWMM.  




SWMM 5 Engine Updates between v13 and v22 by Category

Subject:SWMM 5 Engine Updates between v13 and v22 by Category

The complete list of engine and GUI changes can be found in this text file on the EPA Site http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/epaswmm5_updates.txt

This note  categorizes the engine changes by aggregating dynamic wave solution changes, surface ponding changes, RDII and Hydrology for example.  The number preceding each change is the change number per engine update – the version of the engine update is shown at the end of each change paragraph.  The Categories are General Changes, Dynamic Wave Changes, RDII Changes, Infiltration and Surface Runoff Changes, Climate Data Changes, Rainfall  Changes, LID Changes and Water Quality Changes.



General Changes
6.  The maximum trials used when evaluating the flow and head equations at     a given time period for dynamic wave routing was increased from 4 to 8.     See dynwave.c.   Build 5.0.019 (07/30/10) 28. For models that only compute runoff and have a reporting time step     less t…