Integrated Urban Water Modeling Experiments

1
Integrated Urban WaterModeling Experiments

• Toine Vergroesen, Ambarish Biswas
• Singapore Delft Water Alliance

2
Objectives

• To provide insight in urban water systems, by
  understanding the relevant processes of the urban
  water system and their mutual interaction
• To develop an integrated approach for designing
  and controlling urban water, including the
  accompanying modeling instrument
• To validate a number of relevant processes as
  well as the effect of measures on the amount and
  the delay time of the urban runoff, through
  experiments and modeling

3
Principles
Model requirements Integration of rainfall
runoff, surface water, groundwater and sewer
flow Scaling of processes from fine to
course Simultaneous use of different
scale levels, including processes Free exchange
of processes, modules or complete programs
Research Questions How do the different parts
interact? How can we fit the different time
scales? How can we make a flexible and relatively
fast calculation scheme? What is the range of
validaty of the relevant processes at different
scales? How can we use different descriptions
for the same processes simultaneous? How do we
make the structure of the instrument that
flexibel?
4
State of the Art

• We understand the different parts of the urban
  water system quite well.
• We started (partly) integrated water modeling in
  urban areas years ago, mostly by linking existing
  models or modules together.
• We still have difficulties understanding the
  mutual interaction of the different parts of the
  water system especially in urban areas, where
  complexity is high.

Relevant remaining problems Constrained links
of stand alone models and modules. Different
parts of the water system require different time
frames. Different time frames and different
scales require different process descriptions.
Relevant research questions for Singapore How
can we reduce the peak-runoff? How can we delay
(parts of) the urban runoff?
5
Planned experiments 1

• Reduction / delay of roof runoff by vegetation
  roofs
• February
• planning the experiments, including planning of
  construction
• starting with building parts of the construction
• ordering equipment for measuring, data-handling,
  and other necessary parts
• arranging permits
• April / May
• installing experiment site
• testing equipment
• June
• running first series of experiments
• planning next series of experiments (for July
  September)
• September
• running next series of experiments
• writing first paper

6
Planned experiments 2

• Validation of processes
• Februay
• planning the time frame of the experiments,
  especially the starting time of construction
• April / May ?
• ordering equipment for measuring, data-
  handling, and other necessary parts
• installing experiment site
• testing equipment
• June ?
• installing experiment site
• testing equipment
• planning first series of experiments
• September ?
• running first series of experiments
• planning next series of experiments