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paulevano

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About paulevano

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  1. Dear all, I have created a TIN line (rectangular in shape) within a polygon to amend ground levels in order to create a development plateau. I have used the 'Create TIN Zpts' command to set the plateau at 7mAOD, however, I would like to raise the plateau at areas where the ground level (i.e. underlying zpts) are higher than 7mAOD. I have tried using the MAX command, i.e. 'Create TIN Zpts MAX' within the TGC as I would for zshapes, however, this doesn't seem to work. Does anyone know if the MAX command works with TIN lines? Regards, Paul
  2. Hi there, I am trying to run a linked ISIS Tuflow model, which was running fine last week. I have tried running it again this week, however, I keep getting a "Fatal ISIS Flow Error" message. It says that it "Failed to find TUFLOW_LINK.dll, TUFLOW_LINK_iSP_w32.dll or TUFLOW_LINK_iSP_w64.dll." I have checked where I think ISIS is looking for the TUFLOW_LINK.dll and it is there. How do you know where ISIS islooking for this file? Any help would be greatly appreciated. Kind regards, Paul
  3. Hi Phillip, Thank you for your prompt response. We usually digitize a polygon around an area we want to modify that will be the location where we want to tie levels back into existing and then draw polylines (TIN) with z-points snapped to the vertices (-99999 for locations where we do not want to use existing ground levels). This used to work fine on older model builds. With your approach, won't the model assume straight edges along the ditch edge rather than a batter up to existing ground levels? Kind regards, Paul
  4. Sorry I meant to say we are running Build 2012-05-AE-iSP-w32
  5. Deal all, I have a z-line (TIN) representing a ditch and have specified a value of -99999 on all vertices that do not have an elevation assigned so that it interpolates across rather than using existing ground levels. When I run the model, however, I get an ERROR 2444. Has anyone experienced this before? Assigning -99999 to all vertices missing an elevation usually works fine. If I do not assign anything to a vertices it uses existing ground levels, which is not what I want. We are running Build 2010-10-AD-W32 with the silver dongle. Many thanks, Paul
  6. Dear all, I am running a ESTRY-TUFLOW model with limited cross-sections. I have extracted the cross section information from an ISIS model, however, the cross-sections along this particular stretch of the river are around 300m apart. I have added a couple of interpolated cross-sections and WLL in orcer to best depict the 1D aspect. When I run the model I keep getting lots of the following message (please see attached): UNSTABLE 2999 - Below -251.4m at [177;503]. Time = 5:42:46; Water Level = -656.7; 2D Domain = Domain_001 I believe this is to do with the fact the LiDAR in this area is pretty bumpy, however, I would appreciate any comments if anyone has any tips in order to remove these instabilities, i.e. is there a flag I can assign? Many thanks, Paul
  7. Hi there, I have built a ESTRY-TUFLOW model, however, when I try running the model, I get the following error message: "ERROR 1069 - No Manning's n value found for Material 0 in cross-section "" in "K:\Projects\14369 - Rodericks Terrace Treharris\DESIGN\Civils\WTD_TUFLOW\model\xs\TAFF00669u.csv"? Has anyone had this problem before? I have added Manning's n values for all my cross-sections. I have attached the error message in TUFLOW and how I have my cross section set up. All other cross ections seem to be ok. Many thanks, Paul
  8. Dear all, I am currently using TUFLOW Build 2010-10-AF-iSP-w64 to run a fluvial model, however, whenever I try running with the model with this build I get an error message stating "ERROR 2028 - Could not find a CN object or 1D node snapped to 2D SX object. SX Name =". I am trying to connect a 1D culvert to the 2D domain using an sx link. I have assigned the nodes at each end of the culvert with "sx" for the type with a 'z' flag to lower z-points that are higher (as shown on the attached plan). Has anyone encountered this error message before and if so, is there a simple way around it. This method seems to work fine for older model builds? Kind regards, Paul SX issue.pdf
  9. Dear all, I have just re-run a model that was previously ran using Build 2009-07-AF-iDP using a 32-bit standalone dongle. I am now using a 64-bit standalone dongle and have re-run the model using Build 2010-10-AC-iDP. I have done a quick comparison of the floodplain extents from both runs and the newer build wit the 64-bit dongle shows a greater floodplain extent. I havn't changed anything in the model setup just simply ran it with a newer build and different dongle. Has anyone had this issue before, i.e. is any of the bug fixes/updates since Build 2009-07-AF-iDP likely to affect the floodplain? Is it possible to revert back to Build 2009-07-AF-iDP using a 64-bit dongle? Many thanks, Paul
  10. Dear all, I am trying to run a fairly large model using the newest build (2010-10-AC-iSP-w32) but I get an error messagestating the 'TUFLOW could not allocate enough memory (RAM)' (please see attached). Does anyone know if there is a way of increasing computer RAM instead of reducing the size of the model. I am running the model on the most powerful PC in the office (Windows XP, Intel Core 2, 3.00GB RAM, 2.67GHz). If you could get back to me asap it would be greatly appreciated. Regards, Paul
  11. Dear all, I have been asked to run a sensitivity run using a smaller grid (4m) to assess the difference in flood extents against the original grid (10m). The model is a relatively large tidal model which has been run both with and without a breach in an earth embankment. I would like to compare the difference in flood extents using the grid difference batch file, however, when I run this an error message occurs (see attached) stating that the ASCII grids differ. Does anyone know how to compare two grids of different sizes? Cheers, Paul
  12. Dear all, I am trying to model a weir in 1D, which varies in section (see attached jpeg). I have currently modelled it by copying the downstream cross section (5-5) and assigned an upstream and downstream invert level of 10.1mAOD (the surveyed downstream invert level). I have also represented the crest of the weir (which changes along the cross section) by digitising an xz line and assigning it values based on the surveyed cross section. Is this the best way to represent this weir in the absence of an upstream cross section? Thanks. Paul
  13. Hi, I am trying to link two watercourses to the 2D domain by means of CN and HX lines (see attached plan). I have tried running the model with this configuration (CN lines in green, HX lines in pink and XS lines in blue), however, although the model runs relatively smoothly, water is backing up at the downstream end of the 1D channel and not spilling into the 2D domain. I have also added a z line (brown line) with z points snapped to it to represent the invert level of the channel as the LiDAR is around 0.3-0.4m higher. Does anyone know why flow is not being transferred to the 2D domain? Regards, Paul 1D_2D_Linking.pdf
  14. Hi, I am trying to assign a global roughness value for each of my 1D channel networks rather than specifying each roughness value in the cross section spreadsheet for each channel cross section. I am currently using a 'M' flag in the 1D_xs layer and specifying the roughness value in the .csv file corresponding to each cross section. Does anyone know a way of specifying this in the TCF/ECF file? Cheers, Paul
  15. Dear all, I am trying to model a breach of an earth embankment using a variable z-shape (vzsh) polygon with a seperate points layer snapped to the vertices with elevations of the ground levels behind the embankment (6.4mAOD). As you can see from the attached pdf, the vzsh polygon bisects a 1D and 2D domain. I want to trigger a breach of the embankment when the water level reaches around 7.5mAOD (crest of the embankment is around 8.1mAOD) using a trigger point in front of the embankment (pink diamond on the attached) set to initiate the breach at 7.5mAOD (trigger_value = 7.5) and a period of 0.25hrs. When I run the model the '2d_vzsh_zpt_check' show that the zpts are being lowered, however, floodwater doesn't flow through the breach. I have tried running the breach with exactly the same configuration but instead of assigning a trigger point with a water level I have specified a time when the breach is to be initiated. It seems to me that the problem is that the trigger is located in the deactivated 1D domain. Is there a way of triggering a breach by means of the water level at a 1D node rather than basing it on time? Cheers, Paul Vzsh_Query.pdf
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