SUDS and river lea

• What does SUDS stand for?

  Sustainable Urban Drainage Systems
• How can buildings be adapted for suds?

  urban greening - green roofs
• What are vegetated trenches otherwise known as?

  Swales
• what is a vegetated trench?

  an open channel conveyance system
• What do Swales do?

  they decrease surface run off, increase infiltration, lower flood risk, decrease pollutants going into water sources.
• What do green roofs do?

  they intercept rainfall, increase evapotranspiration, reduce flood risk
• What is the function of containers on buildings?

  capture water for reuse, reduces drought risk
• what is urban greening?

  process of increasing and preserving open space in urban areas
• where is an example of urban greening?

  Hyde park, Central Park
• what has Singapore done to increase SUDS?

  green roofs and buildings, botanical gardens etc
• characteristics of SUDS?


  . easy to manage

  . resilient to use

  . environmentally attractive

  . require little or no energy
• what did the olympic park do to contribute to SUDS?

  permeable paving, dredging and cleaning of the river lea.
• How many wetland plants were put into the river lea?

  380,000
• What 2 positive environmental impacts did the lea restoration have?

  reduced UHI and reduced pollution
• How many tree saplings were planted?

  2000
• Fact about e.coli level in the lea

  was 40 times over the limit
• What was the name of the invasive species which colonised the lea?

  Himalayan balsam
• how much sewage entered the river per day before the restoration project?

  1/4 of a million cubic meters
• how many homes does the river lea protect from flooding?

  5000