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About Luke

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  1. Thanks Rusty - much appreciated.
  2. Hi (probably a question for Rusty?) When preparing SMS animations, is there anyway to load in the time series of the CCA table to show pipe performance? I've seen it achieved in other programs but just wondering if it's available in SMS at all. Cheers, Luke
  3. Hey BuckUser, In RORB, I'd add a new node immediately upstream of where the cumulative hydrograph location is calculated and make it a print code. Link this new node to the downstream node with a 'dummy' reach so no additional routing occurs. Remember, it's good practice to have 3-4 RORB subareas upstream of any print location. Once in TUFLOW, 2d_sa polygons work well with RORB inflows as long as your polygon selects enough cells to allow the flow volume to enter the model. Double check that you're not applying the sa_polygon twice (as that will obviously just add the flow twice). If you're expecting very low flows at the start of your hydrograph spread over large 2d_sa polygons that already have water on them (IWL maybe), running the double precision build of TUFLOW can help. Cheers, Luke
  4. Hi Gillian, You should be able to use an If Scenario in the .ecf try something like this (to model an existing 1D network and then test new features, say mitigation options): Read MI Network == ..\model\mi\1d_nwk_existing.mif If scenario == mitigation1 Read MI Network==..\model\mi\1d_nwk_mit1.mif else if Scenario == mitigation2 Read MI Network ==..\model\mi\1d_nwk_mit2.mif End If ...continue on with .ecf commands
  5. Great tool, Peter - Looking forward to seeing some of the updates. Already proving to be useful.
  6. Hi, I have a model which I believe should be running single precision. It's a large floodplain model with direct inflows (not rainfall on grid) with SA polygons letting flows into the model which are no bigger than 5-10 grid cells. I'm close to sea level and using metric units. The model runs at around 3% ME when run single precision. I ran the model in double precision and noticed the ME dropped to 0.5%. Conversely in the past I've had a single precision model that I've accidentally run in double precision (due to DP being the default I've set in TRIM) and the ME has been considerably worse. I'm hoping someone could shed some light on why the model seems to be happier running in double precision in this case? Thanks, Luke
  7. Luke

    Read Grid Zpts

    Thanks Bill, that's very helpful. The Read Gis expansions sound great - looking forward to it. Cheers, Luke
  8. Luke

    Read Grid Zpts

    Hi Phillip, How does TUFLOW handle the assigning of elevations to z-points from the DEM? Which interpolation technique does it use? (Nearest neighbour, bi-linear, cubic?) Cheers, Luke
  9. Luke

    Read Grid Zpts

    Hi Phillip, The new DEM feature is fantastic. Makes life much easier, especially if you decide to change grid size! I can see that this could potentially be a big issue, especially like you mentioned between MGA94 and AGD84 type shifts. I would like to think that the modeller would have a good feel for what the model terrain and model results should look like before running the model and that they'd be checking the final elevations in SMS or from the 2d grid check. Is it much different to the case if you had a DEM at AGD84 and sampled your zpts in MGA94 from it without checking your final elevations and not noticing? Has the potential problem always existed to some extent? I wouldn't see it necessary, just another good reason to check your inputs and outputs thoroughly. Luke
  10. Hi - hopefully a pretty straight forward one for someone out there! I'm modelling a scenario where a side entry pit and a grate pit are the inlets to the same pipe. I've set them both up as separate pits connected to the same pipe vertex and receive: CHECK 1206 - Pit occurs at the same location as a node, manhole or another pit [iDs: GP9 and SEP11]. Is TUFLOW actually ignoring one of the pits or are both still working? If this isn't right, are there any fixes on how I can connect 2 pits to the 1 pipe? Ideally I would prefer to not go to a pit database solution as I have over 100 situations like this to address with side entry and grate pit combinations galore. At the moment the only work-around I can think of is connecting one of the pits to a pipe with a very short length and then connecting to the other pit - still a bit of work in that too! Thanks, Luke
  11. Hi Chris, We've been trying to find a way to start TUFLOW runs on remote machines without logging on to them. Is there any possibility of this through Trim, perhaps by playing with the ModelQueue.mqf over the network? Looking good so far and is quite useful. It is crashing every time a run finishes though and also sometimes struggles to open a new run when it has previously been run in TRIM (loads the old results into the graph below and won't automatically start). Cheers, Luke
  12. Hi Tom, If you're using MapInfo, add the MapCad tools and you'll get a button called 'Change line direction'. Once your pipe layer is editable you can select all the ones you want to switch and then press the button once and they'll all change. It's a little bit manual selecting all the ones you want to change but at least it will change it in one go. Someone may have a fancy way of selecting all the pipes not facing the right way - i'm thinking along the lines of a query that looks at the invert levels and assumes your pipes are sloping downhill...
  13. Thanks Bill, Along with changing the name of the batch file to match, we also found there was a problem with the "-e" command. We copy and pasted the code from the manual and when we re-wrote the "-e" manually it worked, not too sure why though! Anyway, it's working well now. Many thanks again. Luke
  14. Hi All, I’m trying to set up a Multiple Events run as per Section 4.12 of the manual. When I go to the run the batch file TUFLOW runs but immediately prompts to manually enter the name of a .tcf file. Here is the batch file script I am using (copied exactly as in the manual)... set TUFLOWEXE=C:\Program Files (x86)\TUFLOW\2010-10-AC-w32\TUFLOW_iDP_w32.exe set RUN=start "TUFLOW" /low /wait /min "%TUFLOWEXE%" -b %RUN% –e 50y_10m catchment_n~e~.tcf %RUN% –e 50y_15m catchment_n~e~.tcf %RUN% –e 50y_20m catchment_n~e~.tcf Does anyone have any idea why this isn’t working? I’ve set up the event file and .TCF exactly as per the examples in the manual. Thanks in advance.
  15. Hi, I have a direct rainfall model in which I have pre-processed the rainfall before bringing it in to TUFLOW. I note in the manual that when using the "Read MI RF==" command you can specify your IL and Continuing Loss. Is there a way of using an IL - Runoff Coefficient approach instead? Also, is it possible to set your fraction impervious in TUFLOW also? I'm hoping to get to the point where I can add my IFD generated rainfall directly to TUFLOW and calculate the losses within the model. Thanks in advance. LW
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