application of source ims lake tai – china dave waters
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Application of Source IMSLake Tai – China
Dave Waters
Lake Tai (or Taihu)
Lake Tai (or Taihu), is the 3rd largest freshwater lake in China
(southern part of Yangtze River delta).
Total area of Lake Tai approx. 2,338 km2, average depth of 2m
The lake provides water to 30
million residents.
Lake Tai has been increasingly polluted due primarily to rapid economic growth and increased population in the basin area
(Google Earth)
Wuxi City
Yixing City
Suzhou CityLake Tai
Water Crisis in Lake Tai
Large algal bloom outbreaks in Lake Tai since 1990.
The most significant algal bloom broke out in 2007 in
Mei Liang Bay near the Wuxi City, and led to the "
Wuxi City Water Crisis”.
Huzhou City
2007 Water Crisis in Lake Tai
- Water quality worse than Class V of the Surface Water
Quality Standard (GB3838-2002).
- Tap water supply in Wuxi City had to be temporarily
terminated due to the crisis.
- Led to the development of the Lake Tai Master plan 2008
Project Australian China Environmental Development Partnership (ACEDP)
5 year, $25Million Aust Gov. AusAID initiative
Aimed at supporting and enhancing Policy development in China
Working in areas of mutual interest – focus on water resource management
Aus Lake Tai Cluster
AUS Cluster Lake Tai Team include:
Earth Systems
Melbourne Water
DSE Victoria
EPA Victoria
Hyder Consulting
Extension Activities:• Existing AUS partners +• DPI Victoria• eWater Cooperative Research Centre• Hunter Water Corporation
Chinese Lake Tai Cluster
Lake Tai Basin Authority, China
Nanjing Institute of Geography and Limnology, Chinese Academy of Science (NIGLAS)
Environmental Research Institute, Suzhou
Agricultural Bureau, Suzhou
The Lake Tai Project
Demonstration of eWater tools November 2010
Resulted in a 1 year project - commenced March 2011
Workshops China/Australia 2011
Base models and scenario development
Final meeting January 2012
Working Group in China June 2011
Visit to Australia September 2011
SOURCE IMS PROJECT OBJECTIVES
Building capacity within the Chinese working group
Apply Source IMS model to a pilot area (Dongshan Peninsula)
Model demonstration to improve non point source nutrient management into the lake and inform policy
Model Development
Pilot Area Dongshan Peninsula (82 km2)
Modelling water Quantity, Nitrogen, Phosphorus
7 landuse categories of interest
Assessing relative contribution for each landuse
Running a range of scenarios to look at management options to reduce nutrient export to Lake Tai
Lake Tai
Vegetables
Industrial
High Density Urban
Low Density Urban
Upland Trees
Aquaculture Ponds
Landuse
Aquaculture Ponds (50%)
Upland Fruit Trees (30%)
Vegetables (6%)
High Density Urban (10%)
Base Model Built
Modelling challenges
Data access
Data availability
Replication of aquaculture pond management
Replication of gate closure/pumping of rainfall
runoff to lake
Source able to reflect aquaculture pond management
Canal gates closed at threshold lake level
Pumping to Lake Tai when gates closed
Scenarios
Relocation of STP plant
Conversion of remaining 20% septics
Major wetland construction
Improved management of inputs
TP Proportion of Load x Landuse
Aquaculture
High Density Urban
Industrial
Low Density Urban
Low land Trees
Upland Fruit Trees
Vegetables
Water
STP
Total Nitrogen Load
Total Nitrogen Export
0
10
20
30
40
50
60
70
Aquacu
lture
High D
ensi
ty U
rban
Indu
stria
l
Low D
ensi
ty U
rban
Lowla
nd T
rees
Upland
Fru
it Tr
ees
Veget
able
s
Lo
ad
(k
g/h
a/y
r)
ConclusionsProject has provided great exposure for
eWater
Source IMS flexibility key to success
Versatility to be able to model rural/urban and regulated areas and simplicity attractive features to Chinese delegation
THANK YOUTHANK YOU
The Lake Tai Project
Activity Objectives:
1) Contribute to successful environmental governance
mechanisms at Municipal, Province and Basin levels.
2) Assist greater use of science-based planning,
management and interventions to support lake and river
basin management to improve lake conditions
3) Contribute to a substantial decrease in the frequency
and intensity of algae blooms as a result of specific and
modern IRBM, science and management technologies.