Question

Manning's and Chezy's formula are applicable in which of following conditions​

Answer 1

Answer:

The Manning formula is an empirical formula estimating the average velocity of a liquid flowing in a conduit that does not completely enclose the liquid, i.e., open channel flow. However, this equation is also used for calculation of flow variables in case of flow in partially full conduits, as they also possess a free surface like that of open channel flow. All flow in so-called open channels is driven by gravity. It was first presented by the French engineer Philippe Gauckler in 1867,[1] and later re-developed by the Irish engineer Robert Manning in 1890.[2]

The Manning formula is also known as the Gauckler–Manning formula, or Gauckler–Manning–Strickler formula in Europe. In the United States, in practice, it is very frequently called simply Manning's equation.

The Gauckler–Manning formula states:

{\displaystyle V={\frac {k}{n}}{R_{h}}^{2/3}\,S^{1/2}} V={\frac {k}{n}}{R_{h}}^{2/3}\,S^{1/2}

Answer 2

Step-by-step explanation:

Both formulae are empirical, but the Manning formula is widely accepted as more accurate and is the base formula still in current use for all open channel flow analysis.

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