WSUDeconomy
- Excel-based tool for evaluating the costs of WSUD-projects
Jonas Smit Andersen
PhD student – University of Copenhagen
[email protected]
Ida Marie Knudsen
Engineer – Danish Technological Institute
[email protected]
Why is this important?
The project idea
- in the perfect world
Register
construction
and
maintenance
costs of
recent WSUD
Compare
costs of
different
WSUD
options
Compare
costs of
WSUD with
traditional
stormwater
management
Develop unit
prices for
construction
and
maintenance
Comparison of WSUD projects
Comparison of WSUD and traditional
solutions
Estimated construction cost of WSUD and traditional stormwater management
Experienced unit costs
Constructions cost - WSUD
DKKR pr. m2 catchment area
500.00
400.00
300.00
200.00
100.00
0.00
Rabat Gentofte
kr./m2
224.71
Vejbed
Bredballe
463.58
Vejbed
Brøndby
400
Parcelhus
Hillerød
210.44
Parcelhus
Brabrand
81.08
Reality
Difficulties in
retrieving financial
data from already
completed
construction
projects
Lack of common
framework to
record the
economy of
WSUD projects
Difficulties in
obtaining adequate
overview of each
WSUD project
because they involve
many partners in a
wider planning
process
Life time
cost profile
Common
framework
Accessible
database
WSUDeconomy.xlsm
The expenditure profile
Udgiftsprofil
Diagram of WSUDeconomy
Project registration
Expenditure registration
Construction cost
Expenditure profile
Key numbers - evaluating cost
Other evaluating parameters
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•
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Resilience
Environmental impact
Aesthetic and recreational qualities
Synergy with other construction projects
Other significant effects
What can be gained from WSUDeconomy
• A database of experienced cost for WSUD-facilities, based
on an empiric dataset.
• A framework for economic comparison between different
types of WSUD-facilities and conventional drainage
solutions.
• A basis for developing a "price-lifetime" catalog over
different WSUD-types, for estimating annual value
depreciations
• A basis for discussing the practice in accounting WSUDcosts, and thereby the impact of WSUD-facilities to the
benchmarking-system.
Use WSUDeconomy and support us
• Download WSUDeconomy from:
www.laridanmark.dk/larokonomi
• Return your spreadsheet with data to:
[email protected]
We are interested in:
Experienced cost of WSUD (green)
Estimated and experienced cost of WSUD (green/blue)
Estimated cost of WSUD and conventional management
(blue/orange)
Hopefully we can return the first data primo 2016 
Questions?
• Further questions can be e-mailed to:
Ida Marie Knudsen
[email protected]
Danish Technological Institute
Jonas Smit Andersen
[email protected]
University of Copenhagen