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About JTerry

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  1. Hi Chris Thank you for replying. I'll see if anybody else replies, if not then the dam crest elevation sounds like a good plan, although the dam crest elevation is actually lower than the maximum water level reached over a period when there was flooding, so there's data over the time while the reservoir levels itself out to maximum capacity. If you do create a single bathymetry file for a given reservoir, then how do you change ELWS each time you run the model with a different starting date? If you just change it manually in the npt file, then won't the calculated widths of the cells need to also be adjusted? Julie
  2. Hello all I am getting confused with the way in which I need to create my bathymetry file in WMS for CE-QUAL-W2 in terms of the initial water surface elevation for my model run. I have been provided a reservoir bathymetry map that was created when the reservoir was at a level of ~509 masl. This is in the form of a raster file from ArcGIS, and I have exported the data as an ASCII file and opened it as a DEM in WMS to be converted to a TIN (as recommended previously on this forum). Therefore the maximum elevation of the TIN in WMS is ~509 masl. But this is not the maximum water surface elevation of the reservoir water level data (just the elevation at the time the DEM reservoir boundary was created), sometimes the water level goes up to ~511 masl. So my first question is how should I address this in WMS when setting up the CE-QUAL-W2 interface? The second question refers to the CE-QUAL-W2 bathymetry input file created in WMS. When I follow the tutorial and set the 'top elevation' when calculating the rating curve, layers etc for the segments. What is the 'top elevation' exactly? Is it the maximum elevation of the TIN, the maximum elevation the water reaches during the model run, or in is my initial water surface elevation on the first day of the model run? I.e. Should I be creating a new bathymetry input file in WMS each time I run the model depending on the initial water level on the day the model run starts? Sorry it's long winded, but I'd be grateful for all guidance anybody can provide!!! Many thanks
  3. Hi Chris Thank you very much for replying to my question. I was a bit worried that somehow I would be losing, or smoothing some information along the way by converting from an ArcGIS TIN to a WMS DEM then back to a TIN etc, but if you are advising to do it that way then I feel reassured that it's fine to do it that way!!!
  4. I also can't see how to amend the mess I made of the topic title once posted :-o
  5. Sorry if this has already been asked somewhere in this forum, but I'm a research student modelling water quality with CE-QUAL-W2, new to both WMS and CE-QUAL-W2, and I'm finding the tutorials/Wiki pages confusing. I would like to create my lake bathymetry in ArcGIS as I have ArcGIS shapefiles and I am applying Kriging, using both land and lake elevation data points, in the interpolation. I then want to just export my masked lake area to WMS to create the segments needed for CE-QUAL-W2. All I've been demonstrated how to do is to import my ArcGIS interpolated data points into WMS as a CSV file with XYZ coordinates and then triangulate in WMS. But to me that seems like I am running two types of interpolation on the same data set?? What is the best way to simply import the prepared DEM, raster file, or TIN into WMS as already prepared ArcGIS data, and simply add the segments, branches etc in WMS without re-editing/interpolating. It is a very simple Lake bathymetry map I need, with inflow/outflow, with no watershed or tributaries etc. Thanks for any help anyone can provide!!!
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