FA 2 (part 2) Flashcards
(25 cards)
Weir methods are simple to implement and provide reliable discharge measurements in small rivers.
TRUE OR FALSE
TRUE
The velocity-area method does not require measuring flow velocity at different depths.
TRUE OR FALSE
FALSE
The Rational Method assumes a constant rainfall intensity throughout the storm event.
TRUE OR FALSE
TRUE
A stage-discharge curve is used to correlate which two variables?
A. Stage and time
B. Water temperature and velocity
C. Stage and discharge
C. Stage and discharge
The time of concentration for a catchment can be reduced by increasing the length of the flow path and decreasing the slope.
TRUE OR FALSE
FALSE
The time of concentration is always affected by the rainfall duration.
TRUE OR FALSE
FALSE
In discharge measurement, a velocity meter is used to calculate the flow velocity at various points across the river.
TRUE OR FALSE
TRUE
The velocity-area method can be used to calculate discharge in both high and low-flow conditions.
TRUE OR FALSE
TRUE
Which of the following does NOT affect the runoff calculation in the Rational Method?
A. Rainfall intensity
B. Area of the catchment
C. Duration of the storm
C. Duration of the storm
Float gauges are affected by turbulence, making them less suitable for high-velocity rivers.
TRUE OR FALSE
TRUE
The Rational Method is commonly used for large catchments.
TRUE OR FALSE
FALSE
What is the main principle behind the use of a rating curve in discharge calculations?
A. The relationship between stage (water level) and flow rate
B. The relationship between rainfall and surface runoff
C. The relationship between water velocity and depth
A. The relationship between stage (water level) and flow rate
Float gauges can provide continuous data over time without recalibration.
TRUE OR FALSE
TRUE
Which type of recorder is used to measure and continuously record the water level at a gauging station?
A. Rain gauge
B. Stage recorder
C. Barometer
B. Stage recorder
Which of the following gauges uses a float to measure the water level in a river?
A. Velocity sensor
B. Tape gauge
C. Float gauge
C. Float gauge
The float method provides high accuracy in discharge measurement for large rivers with extremely variable flow conditions.
TRUE OR FALSE
FALSE
The Rational Method assumes that runoff from a catchment is entirely a result of direct precipitation, and does not account for antecedent moisture conditions.
TRUE OR FALSE
FALSE
Pressure transducers are the most suitable for measuring discharge in environments with extreme temperatures.
TRUE OR FALSE
TRUE
The Rational Method assumes that the peak discharge occurs at the same time as the rainfall peak.
TRUE OR FALSE
TRUE
The accuracy of stage-discharge curves can be improved by accounting for flow velocity and depth variations over time, rather than relying on a single stage measurement.
TRUE OR FALSE
TRUE
The Rational Method formula includes catchment area, runoff coefficient, and rainfall depth.
TRUE OR FALSE
TRUE
A weir is used to measure discharge by determining the relationship between which two factors?
A. Pressure difference and water velocity
B. Stage (water level) and flow rate
C. Soil moisture and flow velocity
B. Stage (water level) and flow rate
What does a velocity-area method rely on for calculating discharge?
A. Pre-established flow velocity
B. Cross-sectional area and flow velocity
C. Fixed stage data
B. Cross-sectional area and flow velocity
Pressure transducers can measure stage height by detecting pressure variations in the water.
TRUE OR FALSE
TRUE
