I´m trying to simulate network water pressures using EPANET in a big urban water distribution network. I already have elevation points and water consumption displayed in ArcGis but need to export these data to EPANET in order to perform the simulation. Does anyone know a good interface GIS-EPANET for that, so I won´t need to do this manually?
Hi Gabriel,
have you tried GHydraulics? It is a QGIS plugin for writing EPANET files. Maybe its easier to import your ArcGIS data in QGIS and use this plugin, then digitize the data a second time.
From the same website you can download a toolset called inptools. The shpinp command should convert ESRI shape to INP format.
Detlev
http://epanet.de/ghydraulics/
Thank you Detlev! I will definitely take a look at it.
So far I tried the "sh2epa" free software to export the data, but I was only able to export the physical structure of the network without its important parameters such as water demand and elevation for the nodes and diameter and roughness for the pipes.
Hi Gabriel,
Most of the software I know to convert SHP data into EPANET only converts tiopological structure of the network. However, usually the order this applications write the objects into the INP file is the same than the order in the DBF file of the shapefile. This fact eases the translation of other data such as diameter, roughness or even node elevation into the INP file.Furthermore, once you have the topological structure of the network in EPANET, you can export it to the INP text file in order to add the rest of the data. If you feel confortable working with this INP file it is very easy to fill the data using a spreadsheet like MS Excel.
To be honest, I use my own software (LectorSHP). It makes almost the same than other programs mentioned by you or Dr. Neumann, but only considers links. The nodes are automatically created. It is also free.
The main advantage is that I can change it whenever I wish, including DBF field reading! On the other hand, it is only in Spanish (if I ever find time to translate it into English, I will do).
Just as a final remark, you could try the INP2SHP included in INPTools. I don't have experience in its use, but I've been told that it works quite well.
Hope it helps.
Best regards.
Javier
Sorry for the late reply Javier. I was a lot busy lately managing the whole city´s water data in Excel/ArcGis(which I didn´t finish yet). My goal once the work is finished is not only analyse the current water distribution system but predict it in urban saturation/water scarcity (future) case. I´m still getting to know the program and its language, but it seems really simple as you pointed out. I´d want to create an easy interface Excel/GIS/EPANET so the operators here can update the model themselves. Thank you far all the help. I´ll be posting more info about the progress/problems I face anytime soon.
Best regards,
Gabriel
Actually I have 2 specific problems. First, the zonum tool EPA2GIS doesn´t work(it says its license has expired, although I just download the latest version from the developer´s website). So I can´t import the EPANET´s network skeleton to GIS. Second, I haven´t figured out an automated way in GIS to assemble the different consumers points´ shapefile to the nodes(I don´t even have them yet due to problem 1). I thought about creating Thiessen´s polygons using the nodes as the input then using a simple selection by location to adress each node with all consumers´ points in its cover area. Didn´t try it though.
Ps.: I just found an interesting Excel interface called NSM, which claims to automate all the data exchange between Excel, GIS, EPANET and Google Earth. Has anyone use it yet?
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