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  2. Shields formula - Wikipedia

    en.wikipedia.org/wiki/Shields_formula

    From this follows that for grains greater than 5 mm the Shields parameter gets a constant value of 0,055. The gradient of a river (I) can be determined by Chézy formula: = in which = the coefficiënt of Chézy (⁠ m 1/2 / s ⁠); This is often in the order 50 (⁠ m 1/2 / s ⁠). For a flat bed (i.e. without ripples) C can be approximated with:

  3. Rating curve - Wikipedia

    en.wikipedia.org/wiki/Rating_curve

    [2] The development of a rating curve involves two steps. In the first step the relationship between stage and discharge is established by measuring the stage and corresponding discharge in the river. And in the second part, stage of river is measured and discharge is calculated by using the relationship established in the first part.

  4. Hjulström curve - Wikipedia

    en.wikipedia.org/wiki/Hjulström_curve

    The dimensionless Shields Diagram, in combination with the Shields formula is now unanimously accepted for initiation of sediment motion in rivers. Much work was done on river sediment transport formulae in the second half of the 20th century and that work should be used preferably to Hjulström's curve. [3]

  5. Shields parameter - Wikipedia

    en.wikipedia.org/wiki/Shields_parameter

    The Shields parameter, also called the Shields criterion or Shields number, is a nondimensional number used to calculate the initiation of motion of sediment in a fluid flow.

  6. Watershed delineation - Wikipedia

    en.wikipedia.org/wiki/Watershed_delineation

    Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin.It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.

  7. Luoshu Square - Wikipedia

    en.wikipedia.org/wiki/Luoshu_Square

    The odd and even numbers alternate in the periphery of the Lo Shu pattern; the four even numbers are at the four corners, and the five odd numbers (which outnumber the even numbers by one) form a cross in the center of the square. The sums in each of the three rows, in each of the three columns, and in both diagonals, are all 15.

  8. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    We'll cover exactly how to play Strands, hints for today's spangram and all of the answers for Strands #286 on Saturday, December 14. Related: 16 Games Like Wordle To Give You Your Word Game Fix ...

  9. Flow net - Wikipedia

    en.wikipedia.org/wiki/Flow_net

    Example flow net 2, click to view full-size. The second flow net pictured here (modified from Ferris, et al., 1962) shows a flow net being used to analyze map-view flow (invariant in the vertical direction), rather than a cross-section. Note that this problem has symmetry, and only the left or right portions of it needed to have been done.

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    work of a river diagram calculator example answer page 2 of 5 numbers 1