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  1. Drew08

    Here is a puzzle that I've worked a

    Here is a puzzle that I've worked at for a while with out much result. Take profile station-elevation data, in this case stream profile data cut from a less than perfect LiDAR source, and filter the data such that only local minimum ordinances are left resulting in a station-elevation series...
  2. Drew08

    Time of concentration flow frequency

    Please share your thoughts: What storm event would you use to determine the velocity, for use in calculating the time of concentration, through a constructed drainage ditch? For a natural stream, I use bankfull discharge/velocity, which is typically the 1- to 2-year return period event. The...
  3. Drew08

    Pseudo-static vs. pseudo-dynamic

    Pseudo-static vs. pseudo-dynamic. Which one is the correct usage? To me “pseudo” means not actually, but having the appearance of, i.e., pretending, mimicking. So a pseudo-static model would actually be a dynamic model that mimics a static system. Shouldn’t the appropriate term be a...
  4. Drew08

    Referencing a worksheet in an equation

    Is there a way to refer to a worksheet in the current workbook that is listed in a cell on a different sheet? Say I want to retrieve the value of Cell A1 of Worksheet Sheet 2. From Sheet 1, I would write the equation =Sheet 2!A1. Except rather than typing "Sheet 2", I want to define it in a...
  5. Drew08

    Auto select axis values

    On what criteria does Excel (2007 particularly) decide when to use a zero minimum value with auto axis option, and when to use a non-zero value closer to the minimum value of the selected data? At times I'll be happily working with a cart, changing data, etc. The chart axis min and max values...
  6. Drew08

    Rating Curve of a Grass-Lined, Open-Channel Spillway

    Hi all, I'm trying to get a feel for what methods engineers typically used to determine the stage-discharge rating curve of a grass-lined, open-channel spillway. Something you might see functioning as an emergency spillway at an earthfill dam or retention pond. Please share what you...
  7. Drew08

    Bankfull discharge downstream of a dam

    Does anyone have any experience with river restoration and identification of bankfull discharge downstream of a dam? Or know of any reference or studies completed regarding the influence of a dam on bankfull discharge due to flow reduction and sediment starvation. I have a project of a 700...

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