challenges and strategies of waterfront sustainable ... challenges and strategies of...
TRANSCRIPT
Challenges and Strategies of
Waterfront Sustainable
Development in China
ASEM Seminar on Sustainable Management of Water
Resources in the Context of Urbanization
Michael Zhao
Associate, Arup
May 22, 2014
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• Introduction – Arup
• Challenge-Issues and objectives
• Strategies-Design philosophy
• Technical solutions
• Q&A
Challenges and Strategies of Waterfront Sustainable Development in China
Outline of presentation | ASEM Seminar
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Introduction
About Arup
Introduction
About Arup
Today - 90 Offices Worldwide with 1,1000 Engineers
PEOPLE
11,500
COUNTRIES
35
PROJECTS
10,000 at any
one time
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Introduction
Arup in China
Introduction
ArupWater
Integrated Systems
Water Supply and Demand
Wastewater
Environment & Ecology
Surface Water
Introduction
Whole systems model | Design with water
Introduction
The issues | CIRIA water sensitive urban design
The impact of a changing climate on the water cycle is a major challenge in the 21st, particularly for coastal cities. And more challenge in China
Introduction
The issues | Climate change
Urbanization in China brings to Water
Resources;
1.300 of 657 Cities in China face water
scarcity;
2. Most of Urban Waterways water quality
close to grade V level or worse.
Introduction
The issues | Urbanization in China
Introduction
Design with water | Rivers and urban waterways
Water quality and flood resilience
Strategies | Canals, rivers and waterways
Water quality and flood resilience
Our projects | Canals, rivers and waterways
Water balance and hydraulic controls
What we have? | Gucheng Lake, China
0m
500m 2000m
1000m
固城湖
花山
永胜闸 西舍港 红沙嘴闸
花山港
3500米
4500米
1000米
500米
Gucheng lake,
Portable water supply
storage reservoir,
govern by very strict
pollution discharge
requirement;
Adjunction Grab farm
water quality worse
than grade V;
V
II-III
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Design Philosophy
Three tiers
Water balance and hydraulic
controls
Clean water supply
Balanced ecology
Healthy Lake
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Design Philosophy
Three tiers of analysis
Water balance and hydraulic controls
Clean water supply
Balanced ecology
Healthy lake system
Assessment and Design
Water balance model
Hydraulic/circulation model
Manipulate trophic structure, chemistry
and physical processes
Assess and treat pollutants in supply
waters
• Adequate water quality for:
Contact recreation
healthy aquatic life
limited growth of algae and
odor
clear/aesthetic visual impact
• Balance water supply and
demand
• Mitigate flood risk and
impacts
• Limit water level fluctuations
• Enhance habitat
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Water quality and flood resilience
Design Strategies | Gucheng Lake, China
Design Strategies:
1. Separate catchment
from local grab farm
water hydrology;
2. Design proper flood
protection and discharge,
hydraulic control ;
3. Lake Habitat
Restoration;
4. Pollution control.
Water balance and hydraulic controls
Water balance in a confined system | Gucheng Lake, China
Concentration(kg/m3)
Above 90
80 - 90
70 - 80
60 - 70
50 - 60
40 - 50
30 - 40
20 - 30
10 - 20
0 - 10
Below 0
Undefined Value
488500 489000 489500[m]
3463200
3463400
3463600
3463800
3464000
3464200
[m]
流速[m/s]
Above 0.0100
0.0050 - 0.0100
0.0010 - 0.0050
0.0005 - 0.0010
0.0001 - 0.0005
Below 0.0001
Undefined Value
488500 489000 489500[m]
3463200
3463400
3463600
3463800
3464000
3464200
[m]
Water balance and hydraulic controls
Water quality modelling | Gucheng Lake, China
Lake Certain
Environmental Capacity
Polluted Make up water
Storm Runoff Pollution load
Atmospheric sedimentation
The water quality of downstream rivers and canals is a direct
reflection of upstream management
Clean water supply
Watershed management | Integrated systems are not separate systems
Clean water supply
Stormwater treatment | Gucheng Lake, China
Water balance and hydraulic controls
Water balance in a confined system | Gucheng Lake, China
SUSTAIN – System for Urban Stormwater Treatment, and Analysis INtegratration
Balanced ecology
Importance of vegetation | Influence pathways
Balanced ecology
Importance of vegetation
Habitat Restoration Treatment Wetland Bio-Floating Island
Gravel/ Sand Filter Bed Aeration Bio-Filter
“Our waterbodys should be assets that communities can access and enjoy, especially in urban areas, where so many live and work” Nancy Sutley, US Council on Environmental Quality
