Post on 07-Jan-2017
Urban Water Modelling
Didrik Meijer
Introduction
Irrigation and drainage
Almost no data
Local knowledge
Programme
Cotahuasi,
Peru
The
Netherlands
New Orleans,
USA
Colombo,
Sri Lanka
Dar es
Salaam,
Tanzania
City of Cork,
Ireland Singapore
BvBeeld/Stichting RIONED
Prevent flooding
BvBeeld/Stichting RIONED
Critical Infrastructure: City of Cork
Cities
19 november 2016
Intensity of rainfall
What makes an urban model special?
High level of detail
Different systems:
Sewer system
Drainage system
Surface water
Flash floods
Fluvial, puvial, coastal flooding
Combining different data sources
Data galore: authority crowd!
SRTM Data => 2D model
Changing cities changing floodings
Before After
Adaptation Support Tool
Assist stakeholders (urban planners, drainage departments,
municipalities, landscape designers, project developers, housing
corporations, etc.)
in the process of decision making and designing climate
adaptation measures
to create resilient, attractive, flourishing cities
by providing Adaptation Support Tool and facilitating the design
process
Adaptation Support Tool
Climate Adaptation App - Pre-selection
• Aim:
• Show options to make urban environment (climate) robust
• Fluvial and coastal flooding
• Pluvial flooding
• Groundwater flooding
• Drought
• Heat
• Tool:
• Rank and (pre-)select 126 adaptation measures based on local
conditions
Adaptation Support Tool – Package formulation
• Aim:
• Support design of climate robust cities
• Pluvial flooding
• Drought reduction and groundwater recharge
• Water quality
• Heat stress reduction
• Tool:
• Design climate robust urban developments
19 november 2016
Adaptation Support Tool
SOBEK 2
Urban Rainfall Runoff
Urban 1DFLOW - pipes
Urban 2DFLOW - runoff
Limitations
2D Grid cells <1.000.000
Calculation time
Case Leeuwarden
Leeuwarden Centrum
Area (km2) 52 1.1
Grid cell (m2) 4x4 1x1
Number cells million 3,2 1,1
Rainfall event 30 mm in 1 hour 30 mm in 1 hour
Calculation time
(minutes)
60 10
Resultaten Leeuwarden Centrum
Invoegen filmpje Niels uit Quickplot
Leeuwarden - 3D interactive modelling
Colombo - 3D visualization
Singapore: flash flood forecast, water harvesting
19 november 2016
Future: fast way to build models
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Deltares and models
• Vast knowledge about models to advise about water management
• Deltares models
• Other Models
• Build models based different data sources
• Develop and share models
• Continuity in a rapidly changing world
• Robust solutions
• Easy to maintain
Toolbox: models
WANDA
MIKE-URBAN
Delft3D FM HEC-HMS
HBV 3Di
Future
Urban flooding is becoming increasingly important
Developments:
Data => models
Sewer systems => Delft3D FM
Connection Groundwater drainage system surface water
Fast detailed modeling of urban area with Delft3D FM
<Hoofdstuknummer>
<Hoofdstuktitel> Questions?