Transcript Ben Chifley Modelling System

Integrated Catchment Assessment and Management Centre
Development of a Catchment
Contaminant Cycle Model
End-User Survey: Preliminary Results
Lachlan Newham 28 October 2003
Presentation Outline
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•
•
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LWA project description
Survey format and delivery
Preliminary results
Implications for model development
Integrated Catchment Assessment and Management Centre
LWA Project Description
• Models required to assist end-users identify
sources, pathways, interactions and impacts of
contaminants
• Project aim - development of a contaminant cycle
model, readily accessible to, and understandable
by, end-users for application in large catchments
• Collaborative project - CSIRO Land and Water,
CRC Catchment Hydrology and iCAM, Australian
National University
• Builds on existing modelling approaches e.g.
EMSS, CatchMODS and SedNet
Integrated Catchment Assessment and Management Centre
Project Description
• Case studies in Murrumbidgee and
Brisbane River catchments
• Involvement of end-users in the model
development process is key to its success
and subsequent adoption
• End-user consultation activities
– Build on previous experience in development
of associated water quality models
– Catchment manager workshops in case study
catchments
– End-user survey
Integrated Catchment Assessment and Management Centre
End-User Survey
• Attempt to gain end-user input from large audience
• On-line survey
– Ease of collection and data analysis
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Questions such as:
– How models are used by decision makers
– Which pollutants should be modelled
– Which types of management interventions should be
included
– Which ecological and habitat values indicators are of
interest
– How results are communicated
Integrated Catchment Assessment and Management Centre
Integrated Catchment Assessment and Management Centre
Preliminary Results: Background
40
Proportion of Respondents (%)
• 175 fully
completed
responses
• 200 substantially
complete
responses
• 67% primarily
use models in
their work
• 49% for water
quality
improvement
35
30
25
20
15
10
5
0
Research
Management
Consulting
Teaching
Community
Policy
Representation Development
Activity
Integrated Catchment Assessment and Management Centre
Preliminary Results:
Contaminants
50
45
40
Ranked Very Important (%)
• Low relative
importance for
bedload
sediment (16%)
and thermal
pollution (13%)
• Heavy metals
suggested by
many
respondents as
important
35
30
25
20
15
10
5
0
Suspended
Sediment
Salt
Total
Total
Phosphorus Sediment
Load
Pesticides
Total
Nitrogen
Pathogens
Filterable
Reactive
Phosphate
Contaminant
Integrated Catchment Assessment and Management Centre
Preliminary Results:
Management Interventions
70
60
Ranked Very Important (%)
• Evaporation
basins (6%)
and
groundwater
pumping (15%)
considered or
little importance
for inclusion in
contaminant
cycle models
50
40
30
20
10
0
Land Use Change
Riparian Zone
Management
Point Source
Control
Flow management
Water Quality
Improvement
Management Intervention
Integrated Catchment Assessment and Management Centre
Preliminary Results: Ecological
Indicators
40
35
Ranked Very Important (%)
• Water
birds
(13%)
30
25
20
15
10
5
0
Floodplain/Riparian
Condition
Macro
inverterbrates
Native Fish
Algal Biomass
Gross Primary
Production
Ecological Indicators
Integrated Catchment Assessment and Management Centre
Preliminary Results: Technical
Detail
45
40
35
Ranked Very Important (%)
• Preference for
models running
at daily or
greater time
intervals
• Preference for
representative
climate driving
sequences,
little interest in
stochastic
sequences
30
25
20
15
10
5
0
0-1
1-10
10-100
100-1000
1000-10000
10000100000
>100000
Spatial Extent (km2)
Integrated Catchment Assessment and Management Centre
Preliminary Results:
Communicating Results
80
70
Ranked Very Important (%)
• Preference for
results to be
expressed in
lumped
measures e.g.
annual total
loads
• Preference for
results to be
available for
subcatchment
and stream
reach units
60
50
40
30
20
10
0
Maps
Time Series
Exceedence
Probability
Animations
Tabular Reports
Box Plots
Data Visualisation
Integrated Catchment Assessment and Management Centre
Implications
• Important additional information has
been captured in the survey…
• Important to include as much
knowledge gained from survey
results into contaminant cycle model
• Fundamental structure of proposed
model is supported by results of
survey
Integrated Catchment Assessment and Management Centre
Future Contaminant Cycle Model
• Features of resulting contaminant cycle
model
– Simulation of suspended sediment, nutrients
and salt
– Node-link structure
– Operate at daily time intervals to incorporate
qualitative ecological response
– Scenario based incorporating land use
change, flow regulation, point source loading
and riparian zone management options
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http://www.adsurveys.com.au/csiro/index.cfm?SID=43
Integrated Catchment Assessment and Management Centre
Integrated Catchment Assessment and Management Centre