A. Backhaus
Danish Centre for Forest Landscape and Planning, University of Copenhagen
LAR i Danmark 18.03.2010
Kan problemerne med kloakoverløb til Harrestrup Å løses
med LAR-afkoblinger?
Source: Københavns Kommune (2008). Københavns Kommunes Spildevandsplan 2008. Center for Miljø. Teknik- og
miljøforvaltningen, Københavns Kommune, 2008
Husum
Brønshøj Vanløse
Valby
Google Earth 3 km
Project area
Planning guidelines/ design solutions / transdisciplinary network
Capacity problems
Se w er catch men t le vel Site leve l
Initial catchment strategy Data screening
Existing planning goals Existing land-use Geo-hydrological premises
Water quality aspects
Downscaling Embeded cases for different urban types - hydrology, water quality,
aesthetics, added values
Upscaling Green infrastructure implementation strategy
Hydrological impact assesments
Soil pollution
V1, suspect for soil pollution V2, documented soil pollution
Groundwater interests
drinking water interests
special drinking water interests special restrictions
pumping area
Source: Grundvandsplan 2005 for Københavns Kommune, Miljøkontrollen, Københavns Kommune., s. 14, 32, 34
Analysis of land use
Disconnection of 60%
reduced area to reach the
goal
Working on sites is not equally easy
Single punctual measures vs. large structures
S M L
Utilizing
hydrographical premises
© COWI / Københavns Kommune
Den Tænkende Storby
© Københavns Kommune
Interaction between planner and hydrologist
The geo-hydrological model
•Massiv infiltration leads to a rising groundwater table
•Controled infiltration is possible
•Minimum infiltration
•Step by step disconnection in combination with monitoring
•Combined infiltration and drainage elements
•The model can be used to
estimate the sustainable amount
of infiltration
Concluding catchment map
Different strageties in different areas
On-site infiltration on
private ground The streets for storage and transport
Site designs Ådalsvej
Streetscapes
Dead-end at Ådalsvej
How to handle dead-ends?
1
2
3
60%
What did we learn?
Framing premisses
- Terrain, grundwater, land-use types, soil types - Soil pollution
- Existing renewal strategies and local development goals Principles for disconnection
- Multi level approach - Multi scale approach - Local solutions
Strategy
- Start with the easiest areas (e.g. single owner, high groundwater level, natural sloping terrain)
- Learn from a step by step strategy - Monitor and evaluate
How to go on?
Getting started
- The first 50 ha do not influence the groundwater level
- Use SUDS elements that ensure a good water quality (active soil layer) - Think in local synergies
- Convince stakeholders
Copenhagen today
Copenhagen tomorrow !
Antje Backhaus abac@life.ku.dk
