CSM Assessment & Monitoring Methods 2

Question 1

Which parameter is measured by a totalizing flow meter in a stormwater monitoring program?

Accepted Answer

Cumulative volume over a storm event

Answer

A totalizing flow meter accumulates and records the total volume of flow passing through the monitoring point over the duration of a storm event.

Question 2

What is the primary purpose of using a Manning's n roughness coefficient in stormwater assessment?

Accepted Answer

Calculating open-channel flow velocity

Answer

Manning's n is a roughness coefficient used in the Manning's equation to calculate flow velocity and discharge in open channels and pipes.

Question 3

During a field assessment, you observe a V-notch weir in a detention pond outlet. What does the angle of the notch primarily affect?

Accepted Answer

Sensitivity of flow measurement at low flows

Answer

Narrower V-notch angles increase sensitivity and accuracy at low flow rates, while wider angles accommodate higher flows.

Question 4

A stormwater manager needs to assess the condition of a buried culvert without excavation. Which method is most appropriate?

Accepted Answer

CCTV pipe inspection

Answer

Closed-circuit television (CCTV) inspection allows visual assessment of culvert interior condition, defects, and blockages without excavation.

Question 5

What does an elevated Chloride (Cl⁻) concentration in stormwater runoff most likely indicate in a northern US climate?

Accepted Answer

Road salt application from winter maintenance

Answer

Road deicing salts contain sodium chloride or calcium chloride, and elevated chloride levels in stormwater are a common indicator of winter road salt use.

(CSM) Certified Stormwater Manager Practice Test

(CSM) Certified Stormwater Manager Practice Test

CSM Assessment & Monitoring Methods 2