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Duck

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  1. Hi, might be a bit cheeky asking an ICM related question here but I was hoping to use the asc to asc utility When I have a number of storm duration events results for TUFLOW I would use asc to asc to find the maximum water level between each of these durations. I have some ICM results that I have converted from shapefile to ASCII hoping to use asc to asc for finding the critical duration as I would for TUFLOW but I get two erros; 1. ERROR - number of rows for input grids do not match. 2. ERROR - dimensions of grids do not match Is it possible to use asc to asc in this way for converted ICM results and if so how can I fix these errors? Many thanks for any help you can provide.
  2. Hi Peter, Thanks for the response. I'm still not 100% certain I've got this right. I amended columns A+B to add the ground elevation so I am using the Height and Width in columns D+E (read in a table as XZ). Is this right? Couple things I'm not sure about this though - wouldn't this shape now not match what I am trying to achieve as it is arch shaped rather than elliptical? Also when I ran the model the 1D-ta_tables check file appears as though it has used my Z column (column D in the Rev3 spreadsheet) as the width of the culvert. Is this right? The culvert should be 5.1m height from a bed level of 2.455 and the widest point of the culvert is 8.5m. Thanks elliptical_culvert_Rev3.xlsx RD_Model_Build_04_1d_ta_tables_check.csv
  3. Hi, I have a large elliptical shaped culvert, what is the best way to model the shape (spreadsheet attached shows the shape I want to achieve)? The widest point is about a third of the way up the culvert so if I try using the values in the spreadsheet in a csv table I will get the ascending order values error. Is there anyway around this while maintaining the shape? Thanks elliptical_culvert.xlsx
  4. Hi JJStobart, thanks for the reply. This is the method I was going for but I keep getting 'Error 1033 - No XS line data downstream of channel "XXXX". Could not interpolate cross-section properties.' I added a 1d_xs line (the 1d_xs line was instead of the HW line, is this correct that I don't need both?) crossing the 1d_nwk line the same way as the 1d_bg in your example with a 'XZ' type. I read in the 1d_xs in the ecf like this; 'Read GIS Table Links == xs\1d_xs...' and had it pointing to a csv with X and Z values for the river cross section through the bridge. I can't work out why it is not liking that. Any ideas? Also if I use BB as the bridge type does that mean I don't need a 1d_bg file with the losses?
  5. Hi, I am trying to add a bridge to a model using a 1d_nwk file but I am having issues (I usually model bridges in 2d but the preference for this model is 1d bridges) The model is a 2D rain on grid model with only culverts and bridges modelled in 1D. I am therefore trying to connect a 1d_nwk bridge to the 2D using SX/CN lines the same way you would with a culvert. The error I get is '1033 - No XS line data upstream of channel' between this and the only examples I can find being connect a bridge to a 1d channel line, I am not sure if you can connect a bridge as you would a culvert. Can you connect a bridge using SX/CN lines upstream and downstream? If not is there a way around this like creating a short 10m channel leading up to the bridge?
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