WorksheetsSTORM WATER MANAGEMENT
Total questions: 35
Worksheet time: 18mins
Stormwater runoff occurs when:
Rainfall intensity is lower than infiltration rate
Soil is completely dry
Rainfall intensity exceeds the infiltration capacity of the surface
Water evaporates before reaching the ground
Which surface produces runoff almost immediately after rainfall?
Grass-covered soil
Sandy soil
Forested land
Impervious surfaces such as pavements
Subsurface runoff is best described as:
Water infiltrating and moving slowly through soil layers
Water flowing directly into rivers
Water moving over the land surface
Water stored in detention ponds
Which of the following is NOT part of the hydrologic cycle?
Infiltration
Evapotranspiration
Sedimentation
Runoff
Sustainable Drainage Systems (SuDS) primarily aim to:
Remove stormwater as quickly as possible
Mimic natural drainage processes
Increase concrete drainage infrastructure
Eliminate infiltration
Which of the following is a key function of SuDS?
Increasing peak runoff
Conveying water underground only
Attenuating and slowing down runoff
Preventing groundwater recharge
The SuDS triangle represents the balance between:
Cost, design, and construction
Water quantity, water quality, and amenity/biodiversity
Runoff, infiltration, and evaporation
Pipes, ponds, and pavements
Which of the following is considered a storage facility in SuDS?
Grass swale
Pipe drain
Roadside gutter
On-site detention (OSD) tank
SuDS aim to manage stormwater:
Only at the end of the drainage system
As close as possible to where rainfall occurs
Only within underground pipes
Only during extreme storms
Which of the following best represents the four pillars of SuDS?
Storage, conveyance, infiltration, treatment
Cost, safety, design, maintenance
Pipes, ponds, gutters, drains
Rainfall, runoff, river, ocean
Which SuDS benefit is most relevant to landscape architecture?
Increased concrete usage
Improved biodiversity and visual quality
Higher peak flow rates
Reduced green space
Vegetation in SuDS helps to:
Increase runoff velocity
Prevent infiltration
Filter pollutants and support evapotranspiration
Replace drainage pipes
Which SuDS element mainly improves water quality?
Pipe drains
Concrete channels
Vegetated swales
Road gutters
Compared to traditional drainage, SuDS are better because they:
Focus only on flood control
Require no maintenance
Remove water immediately
Integrate environmental, social, and hydrological benefits
Which SuDS feature promotes groundwater recharge?
Impervious pavement
Underground pipe system
Infiltration basin
Roadside gutter
A key difference between SuDS and traditional drainage is that SuDS:
Are purely engineering-based
Emphasize landscape and ecological design
Depend entirely on mechanical systems
Avoid surface water storage
Bio-engineered waterways mainly help to:
Increase runoff velocity
Control erosion using vegetation
Replace detention ponds
Eliminate surface water
In urban areas, pipe drains are commonly used because:
They improve biodiversity
They allow infiltration
Land availability is limited
They reduce rainfall
In SuDS design, amenity refers to:
Structural safety only
Visual, recreational, and social value of spaces
Pipe diameter size
Water storage volume
Why do SuDS enhance amenity value in urban areas?
They occupy unused land only
They hide water elements underground
They reduce public access
They provide visually pleasing and functional landscapes
A parking lot is fully paved. During rainfall, water quickly flows into drains. What is the main reason?
High infiltration rate
High evaporation rate
Impervious surface prevents infiltration
Low rainfall intensity
A landscape architect wants to reduce runoff in a residential area. Which strategy is MOST suitable?
Increase concrete surfaces
Install detention pond
Remove vegetation
Increase slope gradient
Rainfall intensity exceeds infiltration rate in a grassy field. What will MOST likely occur?
No runoff
Evapotranspiration
Groundwater recharge
Surface runoff
A developer installs rooftop rainwater harvesting tanks. Which SuDS principle is applied?
Conveyance
Attenuation
Harvesting and reuse
Filtration
Which facility is BEST for slowing down stormwater before entering rivers?
Detention pond
Pipe
Road curb
Roof gutter
A site has limited space in an urban area. Which drainage system is MOST appropriate?
Open drain
Vegetated swale
Pipe drain
Detention pond
A designer includes vegetation along a drainage channel to reduce erosion. This represents:
Traditional drainage
Bioengineered waterways
Pipe drainage
Subsurface runoff
Why are gutters designed with a minimum slope?
To increase infiltration
To store water
To ensure water flows properly
To reduce evaporation
A city experiences frequent flooding after urbanization. What is the MAIN cause?
Increased vegetation
Increased impervious surfaces
Decreased rainfall
Increased infiltration
Compare traditional drainage vs SuDS. Why is SuDS considered better?
Faster water discharge only
Focus only on flood control
Integrates water quality, quantity, and ecology
Requires less planning
A detention pond is poorly designed and empties too quickly. What is the issue?
Insufficient attenuation
Excess evapotranspiration
High groundwater recharge
Too much infiltration
A roadway frequently floods despite having drains. What is the MOST likely problem?
High evaporation
Excess vegetation
Low rainfall
Poor inlet design or placement
Which scenario BEST demonstrates subsurface runoff?
Water moving through soil layers
Water flowing on roads
Water evaporating from plants
Water stored in ponds
A designer must choose between a concrete drain and a vegetated swale. Which factor is MOST important to analyze?
Color of materials
Space availability and environmental impact
Number of users
Cost of plants only
A stormwater system aims to mimic natural hydrology. Which combination BEST achieves this?
Pipes + concrete drains
Roof gutters only
Detention ponds + swales + infiltration systems
Roadside curbs only
