WSUD

Question 1

Tools for WSUD

Answer 1

Constructed wetlands, 
Vegetated Swales and buffer strips 
Infiltration systems
Biofiltration system(Swales or basins) 
Ponds and storage/rainwater tanks
Gross pollutant traps
Sediment basin
Rain-garden, sand filter

Question 2

Stormwater re-use opportunities are ?

Answer 2

Roof water- rain water tanks

Triple benefits- flow attenuation, water quality improvement,reduction of potable water demand

Efficient water supply catchment,
Environmental flow benefits

Question 3

Other technologies in WSUD?

Answer 3

Porous pavement- Treatment and storage.

Question 4

Benefits of WSUD

Answer 4

Water quality and flow management, economic, landscape and other community values

Question 5

Sequences of stormwater treatment

Answer 5

Gross pollutant- coarse- fine

Question 6

List the three parts of Hampton wetland

Answer 6

Inlet zone : sedimentation basin, diversion of high discharge
Macrophyte zone : removal of fine particulate, solvable pollutant
High-flow bypass : protecting of the integrity of the Macrophyte zone

Question 7

Principles of WSUD- based stormwater management?

Answer 7

1 consider the receiving waters( upland- flow frequency, pollutant concentration; lowland- loads, annual flow volumes)
2 stormwater as a resource
3 tackle the causes first, then the symptoms
4 breaking the connection between impervious areas and receiving waters ( give first priority to at-source treatment)
5 preserve existing natural assets( intrinsic values, aesthetic asset, ecosystem service)
6 integrate stormwater management into lamdscape
7 make stormwater design management part of broader ecologically sustainable development
8 match treatment type to the pollutant type

Question 8

Objectives of WSUD is ?

Answer 8

Protect and enhance natural water systems, by breaking the connection between impervious areas and receiving waters.
Integrate stormwater management into the landscapes.
Add value while minimizing drainage infrastructure cost.