FA 2 (part 1) Flashcards
(25 cards)
The Rational Method is applicable for small catchments with relatively uniform rainfall intensity and quick response times.
TRUE OR FALSE
TRUE
The Rational Method can be applied to large, rural catchments without significant errors.
TRUE OR FALSE
FALSE
The weir method is most effective in measuring discharge during flood conditions.
TRUE OR FALSE
FALSE
Infiltration is always the dominant factor in runoff calculation for impervious surfaces.
TRUE OR FALSE
FALSE
In the rational method for calculating runoff, the coefficient āCā represents:
A. Rainfall intensity
B. Area of the catchment
C. Runoff coefficient
C. Runoff coefficient
The Rational Method is typically suitable for estimating runoff in which of the following scenarios?
A. Large, complex catchments with varied topography
B. Small, urbanized catchments with defined drainage systems
C. Catchments with predominantly permeable soils
B. Small, urbanized catchments with defined drainage systems
The discharge at a specific location in a river can be calculated by measuring which of the following factors?
A. Stage and cross-sectional area
B. Water temperature and velocity
C. Rainfall intensity and water level
A. Stage and cross-sectional area
Stage-discharge curves are used to convert discharge values into stage height.
TRUE OR FALSE
FALSE
Float gauges are ideal for measuring discharge in deep and high-flow rivers.
TRUE OR FALSE
FALSE
The Rational Method is applicable only for urban catchments with small areas.
TRUE OR FALSE
TRUE
Pressure transducers require periodic maintenance to maintain accuracy in discharge measurements.
TRUE OR FALSE
TRUE
Runoff coefficient values for agricultural lands are typically higher than for forested lands.
TRUE OR FALSE
FALSE
Pressure transducers are highly reliable in small rivers with low flow rates and clear water conditions, as they offer continuous and accurate measurements.
TRUE OR FALSE
TRUE
Infiltration rates are typically higher in urbanized areas compared to rural areas.
TRUE OR FALSE
FALSE
The infiltration rate in the SCS method decreases with increasing rainfall intensity during a storm.
TRUE OR FALSE
TRUE
Weir methods are ideal for measuring discharge in rivers with variable bed profiles because they create a stable hydraulic condition suitable for accurate flow measurement.
TRUE OR FALSE
FALSE
The main function of the runoff coefficient (C) is to account for:
A. Soil texture
B. Land use and surface conditions
C. Rainfall duration
B. Land use and surface conditions
What is the primary factor that determines the runoff from a catchment area?
A. Wind velocity
B. Soil composition
C. Rainfall intensity
C. Rainfall intensity
Pressure transducers are not affected by sediment load in rivers.
TRUE OR FALSE
TRUE
The Rational Method formula assumes that all rainfall contributes directly to runoff.
TRUE OR FALSE
FALSE
Float method involves measuring velocity over a fixed cross-section of the river.
TRUE OR FALSE
FALSE
Weir gauges are used primarily for small streams where flow velocities are low.
TRUE OR FALSE
TRUE
Which of the following best describes a catchment area with a high runoff ratio?
A. The area has high permeability
B. The area is mostly covered by vegetation
C. The area experiences intense rainfall over a short period
C. The area experiences intense rainfall over a short period
The infiltration rate is always constant during a rainfall event.
TRUE OR FALSE
FALSE
