Test: Flood Routing - 1 | 10 Questions MCQ Test

QUESTION: 1

The hydrologic flood-routing methods use

A.
equation of continuity only
B.
equation of motion oniy
C.
both momentum and continuity equations
D.
energy equation only

Solution:

QUESTION: 2

The hydraulic methods of flood routing use

A.
equation of continuity only
B.
equation of motion only
C.
both the equation of motion and equation of continuity
D.
energy equation only

Solution:

QUESTION: 3

The St Venant equations for unsteady open-channel flow are

A.
continuity and momentum equations
B.
momentum equation in two different forms
C.
momentum and energy equations
D.
energy equation

Solution:

QUESTION: 4

In routing a flood through a reach, the point of intersection of inflow and outflow hydrographs coincides with the peak of outflow hydrograph

A.
in all cases of flood routing
B.
when the inflow is into a reservoir with an uncontrolled outlet
C.
in channel routing only
D.
in all cases of reservoir routing

Solution:

QUESTION: 5

Which of the following is a proper reservoir-routing equation?

Solution:

QUESTION: 6

The Muskingum method of flood routing is a

A.
form of reservoir routing method
B.
hydraulic routing method
C.
complete numerical solution of St. Venant equations
D.
hydrologic channel-routing method

Solution:

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,

QUESTION: 7

The Muskingum method of flood routing assumes the storage S is related to inflow rate I and outflow rate Q of a reach as S =

A.
K[xl - (1 - x)Q]
B.
K[xQ + (1 - x)I]
C.
K[xI + (1 - x)Q]
D.
Kx [l + (1 - x)Q]

Solution:

For a given channel reach by selecting a routing interval Δt and using the Muskingum equation, the change in storage is,
S₂ - S₁ = k(xI₂ - I₁) + 1 - x(Q₂ - Q₁)
Where suffixes 1 and 2 refer to the conditions before and after the time interval Δt.

QUESTION: 8

The Muskingum method of flood routing gives Q₂ = C₀I₂ + C₁I₁ + C₂Q₁. The coefficients in this equation will have values such that

A.
C₀ + C₁ = C₂
B.
C₀- C₁ - C₂ = 1
C.
C₀ + C₁ + C₂ = 0
D.
C₀ + C₁ + C₂ = 1

Solution:

QUESTION: 9

The Muskingum channel routing equation is written for the outflow from the reach Q in terms of the inflow I and coefficients C₀, C₁ and C₂ as

A.
Q₂ = C₀I₀ + C₁Q₁ + C₂I₂
B.
Q₂ = C₀I₂ + C₁I₁+ C₂Q₁
C.
Q₂ = C₀I₀ + C₁I₁ + C₂I₂
D.
Q₂ = C₀Q₀ + C₁Q₁ + C₂I₂

Solution:

QUESTION: 10

In the Muskingum method of channel routing the routing equation is written as Q₂ = C₀I₂ + C₁I₁ + C₂Q₁. If the coefficients K = 12 h and x = 0.15 and the time step for routing Δt = 4 hr, the coefficient C₀ is