Alberta Low Impact Development Partnership

Building capacity for urban drainage practices that will protect and restore our watershed resources.

Leta van Duin, B.Sc.

Executive Director Leta.vanduin@calgary.ca ed@alidp.org 403.268.5086

Water Quality

Measure

TSS removal efficiency requirement

Gap

• doesn’t capture fine particles

• doesn’t address dissolved

Volume targets

to ensure stable channel morphology

• Not calculated to address contaminant loadings

Non-structural Measures

• Better planning practices – Re-couple land-use and

stormwater-mgmt planning – preserve natural space – cluster development – reduce street width/setbacks – stack benefits/ uses

• Better construction practices – Min. stripping/ compaction – Soil management – Control concrete washout, etc. – Erosion and sediment control

• More/better maintenance practices – Street sweeping – Catchbasin cleaning, etc.

• Pollution Prevention (P2) – Reduce or eliminate P in fertilizer

(product substitution) – Control pet waste – Dry sweep, don’t hose driveway – Wash car at car wash – Maintain car to reduce oil leaks

• Programs – Education – Training/Certification – Outreach – Marketing – Demonstration

Structural Measures

• Green roofs

• Rooftop misting

• Rainwater harvesting/detention

• Absorbent landscaping

• Downspout redirection

• Rain gardens, planters

• Alternatives to turf

• Pervious pavement

• Tree canopy

• Bioretention

• Green conveyance/bioswales

• Oil/grit separators

• Proprietary treatment processes/ devices

• Ponds/ wetlands/ constructed wetlands- including pretreatment and polishing

• Stormwater reuse