metro manila urban flooding alert system up disaster risk exposure and assessment for mitigation...
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METRO MANILAURBAN FLOODING ALERT SYSTEM
UP DISASTER RISK EXPOSURE AND ASSESSMENT FOR MITIGATION PROGRAM
UNIVERSITY OF THE PHILIPPINES DILIMAN
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PURPOSE
Perennial flooding over Metro Manila has been severely affecting millions, inspiring a need for an urban flooding alert system.
PURPOSE
Where are the possible flooded areas?
How deep is the expected flood?
Is it passable by light vehicles?
URBAN FLOODING ALERT SYSTEM
Awareness among the citizens is the first step in alleviating the destructive impact of flooding.
DESIGN CONCEPTFlood points were identified based on the inundation map generated by a LiDAR based flood simulation.
Surface Flooding Map of Metro Manila
Flood Simulation
Metro Manila LiDar
DEM
Short Duration Rainfall
Scenario
DESIGN CONCEPT
These flood points were assigned to corresponding Automated Rain Gauges (ARGs) using the Thiessen Polygon Method.
Flood points were identified based on the inundation map generated by LISFLOOD flood simulation.
DESIGN CONCEPT
These flood points were assigned to corresponding Automated Rain Gauges (ARGs) using the Thiessen Polygon Method.
An ARG is triggered when rain thresholds are reached.
Flood points were identified based on the inundation map generated by LISFLOOD.
ARG is triggered when rain in ARG reaches
15mm/1hr
Level 1 flood points are expected to experience gutter-deep flood.
30mm/1hr
Level 1 flood points are expected to experience tire-deep flood or higher;
Level 2 flood points are expected to experience gutter-deep flood.
PAGASA Rainfall Warning System
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Automated Text Message
Everytime an ARG is triggered, a text message is automatically sent to persons of authority.
UP DREAM
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Pushbullet Channels
Channels are notification feeds that can be subscribed to. A Pushbullet is sent to notify subscribers.
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Concerned agencies and offices receive an email with the list of possible flooded areas.
VALIDATION
VALIDATION
Flood reports are acquired from:◦News articles◦Social media and apps (e.g. Waze)◦Communication with barangay officials
COMPARING ACTUAL FLOOD POINTS TO EXPECTED FLOOD POINTS GIVEN BY URBAN FLOODING ALERT SYSTEM:
False Positive
TrueNegativeValidated
List of Possibly Flooded Areas List of Actually Flooded Areas
ACTUAL
TRUE FALSE
MODEL
FLOODED ValidatedFalse
Positive
NOT FLOODED
True Negative
COMPARING ACTUAL FLOOD POINTS TO EXPECTED FLOOD POINTS GIVEN BY URBAN FLOODING ALERT SYSTEM:
VALIDATIONSEPTEMBER 22, 2015 RAINFALL EVENT
September 22, 2015 Rainfall Event
ARGs Triggered
ARG Max mm/1hr
Bagbaguin 74
Gen. T. de Leon 45.2
Mapulang Lupa 63.8
Pio Valenzuela 53.2
Science Garden 34
Nangka 20
E. Quintos St. 27.6
Ususan 40.4
ACTUAL
TRUE FALSE
MODELFlooded 14 140
Not flooded 1* D
TOTAL 155
A 0.090 C 0.903
B 0.006 D
September 22, 2015 Rainfall Event
0.103 0.006
0.890
A (Validated)B (True Negative)C (False Positive)
URL: https://test.dream.upd.edu.ph/products/urban-flooding/
THANK YOU