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Hydrology & Irrigation

Muskingum Method

The Muskingum...

Question

The Muskingum method of flood routing is a

A

Form of hydraulic routing of a flood

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B

Form of reservoir routing

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C

Complete numerical solution of St. Venant equations

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D

Hydrological channel routing method

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Solution

The correct option is D Hydrological channel routing method
In reservoir routing, the storage is a unique function of outflow discharge, S = f(Q).
However, in channel routing the storage is a function of both outflow and inflow discharge and hence a different routing method is needed.
From Muskingum method of hydrological channel routing storage is given by
$S = k [x l^{m} + (1 - x) Q^{m}]$

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Q. Muskingum method for routing of flood

Q. For routing of flood in a given channel using the Muskingum method, two of the routing coefficients are estimated as

C_{0} = - 0.25

C_{1} = 0.55

. The value of the third coefficient

C_{2}

Q. Which one of the following flood routing methods involve the concepts of wedge and prism storages?

Q. The Muskingum model of routing a flood through a stream reach is expressed as

O_{2} = K_{0} I_{2} + K_{1} I_{1} + K_{2} O_{1}

K_{0}, K_{1}

K_{2}

are routing coefficient for the concerned reach;

I_{1}

I_{2}

are the inflows to the reach and

O_{1}

O_{2}

are the outflows from the reach corresponding to time steps 1 and 2 respectively. The sum of

K_{0}, K_{1}

K_{2}

of the model is

Q. Consider the following statements.
In case of flood routing in a river channel by Muskingum method, the coefficient x represents:
1. A dimensionless constant indicating the relative importance of inflow and outflow in determining storage.
2. A storage constant having the dimension of time.
3. In natural channels, x usually varies between 0.1 and 0.3.
4. When the values of x equals 0.5, there exists the influence of both inflow and outflow on storage.
Which of these statements are correct?

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