WRM3701 Assignment Project Questions and Correct 100% Verified Answers 2026

WRM3701 Assignment Project Questions and
Correct 100% Verified Answers 2026
Question 1: In a catchment experiencing increasing urbanization, which hydrological
response is most likely to occur during a high-intensity rainfall event?

 A) Increased infiltration and reduced peak discharge
 B) Reduced surface runoff and delayed hydrograph peak
 C) Increased peak discharge and shorter lag time
 D) Decreased rainfall intensity and increased evapotranspiration
Correct Answer: C - Urbanization increases impervious surfaces, reducing
infiltration and accelerating runoff. This leads to a faster concentration of flow,
increasing peak discharge and reducing lag time.

Question 2: Which method is most appropriate for estimating runoff in a small urban
catchment with limited historical flow data?

 A) Rational Method
 B) Muskingum Method
 C) Unit Hydrograph derived from gauged flood events
 D) Darcy's Law application
Correct Answer: A - The Rational Method is widely used for small catchments
and requires minimal data, making it suitable for urban areas with limited records.

Question 3: A rectangular channel experiences subcritical flow. If the slope is gradually
increased, what is the expected hydraulic response?

 A) Flow becomes deeper and slower
 B) Flow transitions toward critical and then supercritical conditions
 C) Flow velocity decreases due to increased friction
 D) Hydraulic radius decreases significantly causing stagnation
Correct Answer: B - Increasing slope increases gravitational force, accelerating

, flow. Subcritical flow (Fr < 1) moves toward critical (Fr = 1) and may become
supercritical (Fr > 1).

Question 4: Which condition best describes critical flow in open channel hydraulics?

 A) Minimum specific energy for a given discharge
 B) Maximum flow depth for a given energy
 C) Flow dominated entirely by viscous forces
 D) Flow at zero Froude number
Correct Answer: A - Critical flow occurs when specific energy is minimized for a
given discharge and Froude number equals 1.

Question 5: A municipal water system uses chlorination primarily to:

 A) Remove turbidity
 B) Disinfect pathogens
 C) Increase mineral content
 D) Reduce water hardness
Correct Answer: B - Chlorination is used to kill or inactivate disease-causing
microorganisms in drinking water.

Question 6: Which pipe material is most resistant to corrosion in water distribution
systems?

 A) Uncoated steel
 B) Copper
 C) PVC
 D) Cast iron without lining
Correct Answer: C - PVC is non-metallic and highly resistant to corrosion
compared to metal pipes.

Question 7: Which process is most effective for removing dissolved inorganic
contaminants such as nitrates from drinking water?

,  A) Sedimentation
 B) Ion exchange
 C) Flocculation
 D) Screening
Correct Answer: B - Ion exchange removes dissolved ions such as nitrates
through replacement with less harmful ions.

Question 8: Which parameter most directly governs groundwater flow velocity in
Darcy's Law?

 A) Porosity only
 B) Hydraulic conductivity and hydraulic gradient
 C) Soil color and texture
 D) Atmospheric pressure variations
Correct Answer: B - Darcy's Law defines flow as proportional to hydraulic
conductivity and gradient.

Question 9: Which indicator is most reliable for assessing recent fecal contamination in
drinking water?

 A) Total dissolved solids
 B) Escherichia coli presence
 C) Turbidity levels only
 D) Hardness concentration
Correct Answer: B - E. coli is a direct indicator of fecal contamination.

Question 10: What is the main environmental risk of excessive nitrate concentration in
drinking water?

 A) Neurotoxicity in adults
 B) Methemoglobinemia in infants
 C) Immediate corrosion of pipelines