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Showing results for tags 'pits'.
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Hi, We're currently modelling a 460ha catchment with rainfall on the grid. We are modelling roughly 2000 pits and pipes in the network. I have run ten ARR2019 temporal patterns for the 1% AEP 30 minute duration storm, and on first glance all seems well. However, I started looking at the flow going into all the pits and found a lot of the pits are showing a strange inflow hydrograph. It generally looks like the top of the hydrograph I’m expecting to see has been inverted on itself. See attachment. It seems to mainly occur where there is substantial flooding around the pit entry area. It also always starts around the 0.2 hour mark, generally a little before but it changes by pit. I was hoping someone could offer some advice. Many thanks
I put this command in my TBC file: Read GIS SA All RF == gis\2d_sa_rf_LT_FutureTCD_001_R.shp ! Future Town Centre Development TUFLOW stopped without giving me an error. Here is the final lines of the TLF: Found database line: ARR2016_Urban,ARR2016_URBAN.csv,Time_0180M,01pct_0180M_01,,,,, ...Array size from xf file: 58 Opening GIS Layer: R:\PROJECTS\XXX\Modelling\TUFLOW\model\gis\2d_sa_rf_LT_FutureTCD_001_R.shp GIS Layer assigned ID of 2 1 DBF Fields (Name [#/Type/Length]): Name [1/C/100] Reading: R:\PROJECTS\1XXX\Modelling\TUFLOW\model\gis\2d_sa_rf_LT_FutureTCD_001_R.shp I found the problem was only 1 Attribute in the 2d_sa GIS fle instead of the required 5. But it should stop with an error message. The same behaviour is exhibited whether I use HPC or Classic. Regards Tina
Q: Is there an easier way to determine whether or not the manholes/gullies are surcharging other than using the EOF file, take the elevation of each MH, and take the max stage and compare the two together? A: When I want to visualise surcharging pits I load the mmQ layer and thematically map to see if there are any negative values in the Qmin column. I’ve popped an example in the first image below. You can do this by thematically mapping in MapInfo or using graduated styles in QGIS. You can so use the TuPlot plugin for QGIS to get more information on flows and how the pits are performing. Refer to the second image. Comments on how you visualise things most welcome!
Hi All, I have a few pits in my pit/pipe network that are showing zero flow into the pit (according to the TS layer), however the CCA layer is showing the pipes are running full. I used the SA_PITS method to input the flow directly into the pits. Has anyone else seen this before?