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  1. bahar57's Avatar
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    #1

    Question The values of Manning's coefficient.

    Dear friends,

    Could you please correct the following sentences if they are wrong or tell your suggestion in better terms?

    "The more the values of Manning's coefficient become large, the more the water depth increases. Conversely, the more the values of Manning's coefficient become small, the more the water depth decreases. However, in computing the water depth, the Manning's coefficient is a little more sensitive to decreasing the n values than increasing the n values."

    Thank you,
    Bahar

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    #2

    Re: The values of Manning's coefficient.

    I have changed your thread title, bahar.


    Extract from the Posting Guidelines:

    'Thread titles should include all or part of the word/phrase being discussed.'

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    #3

    Re: The values of Manning's coefficient.

    From my understanding of physics, a coefficient (e.g. friction, elasticity, thermal resistance, conductivity, etc) is supposed to be constant. It is an indication of the inherent property and characteristics of a material.
    How is it that the value of your coefficient changes in this case?

    http://dictionary.reference.com/browse/coefficient
    Last edited by tedmc; 15-Sep-2015 at 08:54.
    I am not a teacher.

  2. lotus888's Avatar
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    #4

    Re: The values of Manning's coefficient.

    Try:

    "As the value of the Manning's coefficient increases, the water depth increases (presumably because of the decreased flow Q). Conversely, as the value of the Manning's coefficient decreases, the water depth decreases. However, in computing the water depth, the Manning's coefficient is a little more sensitive to decreasing values of n than increasing values of n." (actually, n is the Manning's coefficient)

    Manning's equation is used to calculate open channel water flow (like rivers and aqueduct) in civil engineering. A decrease in the Manning coefficient n means an increase in water flow Q (see equation below). The coefficient n is obtained from empirical data for various types of flow environment or conduit.


    http://stormwaterbook.safl.umn.edu/c...n-channel-flow




    --lotus
    Last edited by lotus888; 15-Sep-2015 at 09:42.

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