8.11 The Muskingum channel routing equation is written for the outflow from the reach Q in terms of the inflow I and coefficients C, C and C, as (a) Q2 = C, Io+ CQ + Cl, (c) Q2= Colo+ C,I, +C,l½ (b) Q2 = Col2 + C¡I, + C,Q2 (d) Q2 = CQo + C¡Qj + C„lz %3D %3D
8.11 The Muskingum channel routing equation is written for the outflow from the reach Q in terms of the inflow I and coefficients C, C and C, as (a) Q2 = C, Io+ CQ + Cl, (c) Q2= Colo+ C,I, +C,l½ (b) Q2 = Col2 + C¡I, + C,Q2 (d) Q2 = CQo + C¡Qj + C„lz %3D %3D
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
![Flood Routing 319
8.11 The Muskingum channel routing equation is written for the outflow from the reach Q in
terms of the inflow I and coefficients Co, C, and C, as
(a) Q, = C, lo + CQ + C,I,
(c) Q2 = Colo + C,I, +C,l
8.12 In the Muskingum method of channel routing the routing equation is written as
Q, = C,l, + C,I, + C,Q, If the coefficients K= 12 h and x 0.15 and the time step for
(b) Q2 = Col, + C,l + C,Q2
(d) Q2 = CQo+ CQ + C,l,
routing At = 4 h, the coefficient C, is
(а) 0.016
8.13 In the Muskingum method of channel routing the weighing factor x can have a value
(a) between -0.5 to 0.5
(c) between 0.0 to 1.0
8.14 In the Muskingum method of channel routing if x = 0.5, it represents an outflow
hydrograph
(a) that has reduced peak
(b) with an amplified peak
(c) that is exactly the same as the inflow hydrograph
(d) with a peak which is exactly half of the inflow peak
8.15 If the storage S, inflow rate I and outflow rate Q for a river reach is written as
(b) 0.048
(c) 0.328
(d) 0.656
(b) between 0.0 to 0.5
(d) between -1.0 to +1.0
S = K[x I" + (1 - x) Q"]
(a) n= 0 represents storage routing through a reservoir
(b) n = 1 represents the Muskingum method
(c) n= 0 represents the Muskingum method
(d) n =0 represents a linear channel.
8.16 A linear reservoir is one in which the
(a) volume varies linearly with elevation
(b) storage varies linearly with the outflow rate
(c) storage varies linearly with time
(d) storage varies linearly with the inflow rate.
8.17 An isochrone is a line on the basin map
(a) joining raingauge stations with equal rainfall duration
(b) joining points having equal standard time
(c) connecting points having equal time of travel of the surface runoff to the catchment
outlet
(d) that connects points of equal rainfall depth in a given time interval.
8.18 In the Nash model for IUH given by
1
u(t) =
(t/KY- (e) K
KT(n)
the usual units of u(t), n and K are, respectively;
(a) cm/h, h, h
(c) h', dimensionless number, h
(b) h, h, h
(d) cm/h, dimensionless number, h
8.19 The peak ordinate of the IUH of a catchment was obtained from Nash model as 0.03 cm/
h. If the area of the catchment is 550 km? the value of the peak ordinate in m'/s is
(а) 16.5
8.20 If the Gamma function T (1.5) = 0.886, the value of r (0.5) is
(b) 45.83
(c) 30.78
(d) 183.3
(a) 0.5907
8.21 In the Nash model for IUH, if M = the first moment of ERH about the time origin
divided by the total effective rainfall and Mo = the first moment of DRH about the time
origin divided by the total direct runoff, then
(a) Moi - M1 = nK
(c) Moi - M1 = n (n + 1) K
(b) 1.329
(c) -0.886
(d) 1.772
(b) M1- Moi = nK?
(d) M1- Moi= 2 nK](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5f7894b5-a845-4fcb-a777-7c5ec717fbfd%2F96e8731e-fd0d-42db-8acf-d0543dcfc14a%2Ffc9y2ii_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Flood Routing 319
8.11 The Muskingum channel routing equation is written for the outflow from the reach Q in
terms of the inflow I and coefficients Co, C, and C, as
(a) Q, = C, lo + CQ + C,I,
(c) Q2 = Colo + C,I, +C,l
8.12 In the Muskingum method of channel routing the routing equation is written as
Q, = C,l, + C,I, + C,Q, If the coefficients K= 12 h and x 0.15 and the time step for
(b) Q2 = Col, + C,l + C,Q2
(d) Q2 = CQo+ CQ + C,l,
routing At = 4 h, the coefficient C, is
(а) 0.016
8.13 In the Muskingum method of channel routing the weighing factor x can have a value
(a) between -0.5 to 0.5
(c) between 0.0 to 1.0
8.14 In the Muskingum method of channel routing if x = 0.5, it represents an outflow
hydrograph
(a) that has reduced peak
(b) with an amplified peak
(c) that is exactly the same as the inflow hydrograph
(d) with a peak which is exactly half of the inflow peak
8.15 If the storage S, inflow rate I and outflow rate Q for a river reach is written as
(b) 0.048
(c) 0.328
(d) 0.656
(b) between 0.0 to 0.5
(d) between -1.0 to +1.0
S = K[x I" + (1 - x) Q"]
(a) n= 0 represents storage routing through a reservoir
(b) n = 1 represents the Muskingum method
(c) n= 0 represents the Muskingum method
(d) n =0 represents a linear channel.
8.16 A linear reservoir is one in which the
(a) volume varies linearly with elevation
(b) storage varies linearly with the outflow rate
(c) storage varies linearly with time
(d) storage varies linearly with the inflow rate.
8.17 An isochrone is a line on the basin map
(a) joining raingauge stations with equal rainfall duration
(b) joining points having equal standard time
(c) connecting points having equal time of travel of the surface runoff to the catchment
outlet
(d) that connects points of equal rainfall depth in a given time interval.
8.18 In the Nash model for IUH given by
1
u(t) =
(t/KY- (e) K
KT(n)
the usual units of u(t), n and K are, respectively;
(a) cm/h, h, h
(c) h', dimensionless number, h
(b) h, h, h
(d) cm/h, dimensionless number, h
8.19 The peak ordinate of the IUH of a catchment was obtained from Nash model as 0.03 cm/
h. If the area of the catchment is 550 km? the value of the peak ordinate in m'/s is
(а) 16.5
8.20 If the Gamma function T (1.5) = 0.886, the value of r (0.5) is
(b) 45.83
(c) 30.78
(d) 183.3
(a) 0.5907
8.21 In the Nash model for IUH, if M = the first moment of ERH about the time origin
divided by the total effective rainfall and Mo = the first moment of DRH about the time
origin divided by the total direct runoff, then
(a) Moi - M1 = nK
(c) Moi - M1 = n (n + 1) K
(b) 1.329
(c) -0.886
(d) 1.772
(b) M1- Moi = nK?
(d) M1- Moi= 2 nK
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