LOOKING AT THE RISK MAPPING & REPORTING OF NETWORK LEAKS USING REMOTE SENSING

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Moira Smith | Quentin Béchet Digital Content Analysis Technology Ltd | Veolia

Negócios

Dr. Moira Smith (D-CAT)
Dr. Quentin BECHET (Veolia)
Using trees as
sensors to predict
sewer blockages

WE ARE HELPING GREATER WESTERN WATER TO
OPTIMISE THEIR SEWER MAINTENANCE PROGRAM
Western Network length (20/21)
1,563 km
Western blockage rate (20/21)
15.3 blockages / 100km / year
Maintenance rate (20/21)
~5% / year

IDEALLY WE WANT DIRECT TECHNIQUES
TO TARGET WHAT PIPES TO CLEAN
Smart sewer lid Kando sensors
Examples of sensor technologies trialled
at Greater Western Water Sensor-based
technologies have
great potential but are
still very expensive!
The entire network
cannot be equipped
with these sensors,
especially in Australia
where networks are
extensive!

THE TREES CAN BE USED
AS BLOCKAGE SENSORS
In Victoria, the large majority of
blockages are caused by tree
roots

D-CAT DEVELOPED AN ALGORITHM FOR TREE GROWTH
INITIALLY FOR THE FORESTRY INDUSTRY
For deforestation For monitoring planting, growth & regeneration
Change in
tree health
over time
Earlier satellite image Later satellite image
Area for
replanting
Tree
growth
evident
Segmented
region of
growth
Automatically
highlighted
Detected
deforestation,
Bolivia
More within months
GREEN: vegetation, e.g. forest areas
BLUE/BLACK: water bodies & bare soil

USING MULTISPECTRAL SATELLITE IMAGERY
TREE DETECTION AND INSIGHTS ARE POSSIBLE

STEP 1
SKYCAM BLOCKAGES CAN DETECT TREES

STEP 2: TIME SERIES OF SATELLITE IMAGES CAN BE USED TO
DETECT ABNORMAL TREE ABUNDANCE
No action required
Monitor
Anomalous Trees

WE SUCCESSFULLY TESTED SKYCAM BLOCKAGES
IN SUNBURY, VIC

CLEANING THE 5% MOST CRITICAL PIPES WOULD ALLOW
TO AVOID ~20% OF BLOCKAGES
Percentage of network inspected (%)
Percentage
of
blockages
avoided
(%)

SKYCAM BLOCKAGES DEMO
“TREE RISK” ON PIPES

SKYCAM BLOCKAGES DEMO
SATELLITE IMAGE PIXELS

CONCLUSIONS
& NEXT STEPS
Promising results
SkyCam Blockages was proven through multiple trials over years and different locations in
Victoria to reliably highlight anomalous trees near to sewer networks, providing utilities the
ability to optimise network inspections and cleaning.
Next steps
SkyCam Blockages will shortly (today!) go live at Greater Western Water.

Dr. Moira Smith (D-CAT)
moira.smith@d-cat.co.uk
Questions?
Contact us!
Dr. Quentin Bechet (Veolia)
quentin.bechet@veolia.com

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