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  • Users: Ryb01
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  1. Ryb01

    IDF A,B,C Coefficients vs SCS Storm Distribution

    Hello All, I recently had a conversation with a colleague of mine regarding converting rainfall intensities from A,B C coefficients of the rational method to rainfall depths to further generate a SCS storm distribution. I had never heard of this before and I would question the accuracy of...
  2. Ryb01

    Pipe Discharge

    I seem to recall reading a past post a while back regarding how to calculate the distance flow would travel out of a storm sewer outfall given a known flow, pipe size, etc. Could someone point me in the right direction? Thanks.
  3. Ryb01

    HEC-RAS Model Calibration w/Measrured Flow Data

    Hello All, I'm in the process of modelling several reaches in HEC-Ras. For each site(reach) we've obtained measured flow data (from a third party). We are to calibrate the HEC-Ras model to produce the same water surface elevation produced in the field. I've attached a sample data set of the...
  4. Ryb01

    Stormwater Quality Treatment-Rural Road Design

    Our company has ben involved in several rural road reconsruction projects in the past few years. A topic that seems to keep resurfacing time and time again is stromwater quality treatment, more specifically, salt removal efficiency. We've started using different type's of LID treatment (where...
  5. Ryb01

    Flow Into An Infiltration Trench

    I'm currently desiging an under ground storage facility, storing approximately 70,000ft3(2000m3). Will probably using Cultec Chambers, un-decided at this point. This SWM facility is being designed as one of many LID's onsite promoting infiltration. We've been asked to allow major system runoff...
  6. Ryb01

    Plunge Pool Design

    Hello All, I'm currently working on a project requiring erosion protection. We have a 1.2m dia culvert discharging 3.7m3/s to a channel, 120m long @ 5.0% grade, 2.0m bottom width, 2:1 side slopes, approx 1.8m deep. This channel has an abrupt transition to approx 0% near the outlet to a...
  7. Ryb01

    Frozen Groundand Snow Pack Runoff from a Ski Resort

    Hello Everyone. I'm currently working on calcualting runoff from a ski hill to a chalet type residential area at the bottom of the hill. The total drainage area to the residential area is approx 400ha. Land gradient of the hill is approx 25%, residential area is at a 3-5% grade, D type soils...
  8. Ryb01

    Storage Unit/Outlet Properties

    Hello SWMM users, I have a question(s) about the method used with regards to the Storage Unit and also the Outlet properties in SWMM 5.0. I have the understanding of the following; Storage Unit Properties -the user has the option to select either a functional or tabular shape curve which...
  9. Ryb01

    SCS Storms

    Hello, I was just wodering if there was anyone who had experience with a 12-hour SCS or 6-hour SCS Storm? I wasn't aware, until recently that these two storms (if they can be created) would still be appicable to the TR-55. I am aware of a "24-hour SCS" storm but was not aware that a shorter...

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