Watercad Help

[Shanta Plansinis]

GeoffreyD Stone FIMechE C.Eng;FIEAust CP Eng

www.waterhammer.bigblog.com.au RE: WaterCAD Help francesca (Civil/Environmental)15 Sep 06 21:17If the PE doesn't care to make sure you're understanding what you do then you may as well make up the numbers and let him lose his license. RE: WaterCAD Help DMcGrath (Civil/Environmental)15 Sep 06 21:55I agree, the manuals are junk, and don't bother upgrading (high $$ and you don't even get a printed manual anymore, and predatory licensing policies). Ok, off my soap box....

A pump will need a source, and this can be designated as a reservoir or a tank. I usually use a reservoir as they don't go empty and you can maintain a constant static water level on the intake side of your pump. You will need the pump curve for sure, as francesca says. Remember that every node, tank, reservoir and pump in your system needs an elevation. Another thing you will need is a demand somewhere in your system. WaterCAD doesn't like pumps deadheading for no reason. Create a node that either has a demand on it or if you prefer an open pipe, set the emitter coefficient to something high, like 10,000 gpm/psi and it will flow like there is no tomorrow.

Bottom line with modeling (of any sort): Garbage in = garbage out.

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I am wanting to know more about the WaterCAD to AutoCAD Integration. Can you integrate WaterCAD into regular AutoCAD? What is the latest version of AutoCAD that you can do this for if this is possible?

I currently model water systems in the standalone version of WaterCAD and I believe this integration could help with things tremendously when laying out these models. If this is possible how do you do the integration where you have all the WaterCAD tools on your AutoCAD?

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Does anyone know how to transfer an AutoCad or ArcGis file to an epanet2input file? I currently have a dwg file and shapefile of all the pipenetworks of our campus and would like to do some modeling with them.

There are a few commercial applications that can import AutoCAD and GIS typefiles. I personally use WaterCAD (www.haestad.com). Great options forimporting different file formats and then saving to an EPANET input file.

Timothy You must export de .dwg file to an *.wmf file and then, in epanet, you go to view - backdrop - load and take this *.wmf file to epanet. You must observe how to rescale it, I am sending you an attachment that can helps.

I have a network I drew in AutoCAD that I want to import into EPANET, but itis saved as a DXF and I no longer have access to AutoCAD. You mention thatWatercad supports the importing of AutoCAD data. Does it also support importof DXF? Also, I have in the past converted a WaterCAD model to EPANET formatfor the study I am doing, but you said Watercad can save to EPANET format?

To answer your questions briefly, though, I have imported a DXF into WaterCADbefore with good success, and the export to Epanet is a piece of cake now. Icommonly work with both models, and I consider myself to be a "power user",so if you have any other questions feel free to email me directly.

In the web site www.esri.com u can see a lot of scripts for arcviewthat take a theme of polylines, pipes, and convert this to aINP file for EPANET, maybe you will take this and translate to VB, andused in ArcGIS, I tried that in a macro in VB for AutoCAD, but i neverfinished. But that is my idea if you dont have WaterCAD.

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I'm very new to EPANET and need some help. I'm not a modeler bytraining but I do have some visual basic programming experience. Irecently received an EPANET data file generated from WaterCad thatcomprises our water distribution network. When I try to run thesimulation in EPANET, I get input error 227, something about an invalidhead curve. I've looked at the curve using the curve editor andeverything looks fine. Does EPANET have any kind of debuggingcapabilities? Does anyone have any idea of how to fix this withoutdeleting the entire pump station from the simulation?

I suspect thought, you most likely are running into difficulty with the"pump" curve, because EPANET allows you to specify a pump curve using"single-point", "three-point", "multi-point", and "variable-speed"curves. This is the parameter that has always caused us the most issueswhen converting from one software program's file to another softwareprogram's file. For additional info, see the EPANET Users Manual,Section 3.2 (Non-Physical Components)

Have you tried to assign the curve to another pump in a different water distribution system, such as example network 1 in EPANET's manual. Or you can change another curve for the reported error one, then run the simulation to see weather it is successful.

It reminds me of an exchange I had with the Division of Safety of Dams [DSOD] here in California. Before 911 the DSOD had a list of the dams in CA on their website. After 911 they took the list off their website for "security" reasons.

I called them up and asked the obvious question Why? And got the obvious answer was because of security reasons. I told them that dams in the state of CA are pretty easy to find without the list. Uhh, just get a road map and look for the blue, eureka I found it!!!. Dams like Shasta, Oroville, Folsom for example are pretty hard to hide. And the fact that you have a list telling you when they were built, height, acre-feet of storage, type etc isn't that much more information if you are a bad guy.

Think about it. The fact that you send your water model to a couple of geek engineers is not really putting your water system in danger. We already know where your water tanks are. They are the big cans sitting at the top of the hill or elevated with a pretty picture on them.

I think the best way to find the problem in an INP file is debugging theEPANET source code. You can download and debug it in any IDE, such as VisualC++ 2005. Some breakpoints will reveal the problem clearly.

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