3. Surface Water Hydrology
Streamflow Measurement — Quiz
Test your understanding of streamflow measurement with 5 practice questions.
Practice Questions
Question 1
Which of the following methods is most appropriate for measuring streamflow in a large river with significant depth and high velocity, where direct wading measurements are impractical or unsafe?
Question 2
A stream's cross-section is divided into four segments. The area and average velocity for each segment are as follows:
Segment 1: Area $= 2.0 \text{ m}^2$, Velocity $$= 0.8 \text{ m/s}$$
Segment 2: Area $= 3.5 \text{ m}^2$, Velocity $$= 1.2 \text{ m/s}$$
Segment 3: Area $= 1.5 \text{ m}^2$, Velocity $$= 0.6 \text{ m/s}$$
Segment 4: Area $= 2.5 \text{ m}^2$, Velocity $$= 1.0 \text{ m/s}$$
What is the total discharge of the stream?
Segment 1: Area $= 2.0 \text{ m}^2$, Velocity $$= 0.8 \text{ m/s}$$
Segment 2: Area $= 3.5 \text{ m}^2$, Velocity $$= 1.2 \text{ m/s}$$
Segment 3: Area $= 1.5 \text{ m}^2$, Velocity $$= 0.6 \text{ m/s}$$
Segment 4: Area $= 2.5 \text{ m}^2$, Velocity $$= 1.0 \text{ m/s}$$
What is the total discharge of the stream?
Question 3
When developing a stage-discharge rating curve, which of the following factors is most likely to cause a significant deviation from a simple power-law relationship, leading to a complex or looped rating curve?
Question 4
In the context of uncertainty propagation in streamflow measurement, if the discharge ($Q$) is calculated as the product of cross-sectional area ($A$) and average velocity ($V$), i.e., $Q = A \times V$, and the percentage uncertainties in $A$ and $V$ are $U_A$ and $U_V$ respectively, what is the approximate percentage uncertainty in $Q$?
Question 5
A stream has a rectangular cross-section with a width of $8 \text{ m}$ and a depth of $2.5 \text{ m}$. If the average water velocity is $1.2 \text{ m/s}$, what is the discharge of the stream?