Social Media Sensing for Disaster Situation

@alramadona

Situation

Kalutara district, Sri Lanka

• 24th May 2016: heavy rainfall

• 25th May 2016: disaster due to rapidly rising river water levels

within the next 24 hours many areas in the district were affected by strong winds, flash floods and landslides

Twitter Data

• Streaming API

all keyword: flood, landslide, disaster, gan watura, naya yama, marana, hadisi apada, Kalutara, Sri Lanka

flood

marana

Sri Lanka

Daily Twitter users in Sri Lanka

all user

user with location data

< 50% of all user

Apr 15 May 01 May 15 Jun 01

05

00

10

00

15

00

t

12

34

5

user

tweet

tweet per user

GLOBAL

time

2017-04-11 2017-04-16 2017-04-21 2017-04-26 2017-05-01 2017-05-06 2017-05-11 2017-05-16 2017-05-21 2017-05-26 2017-05-31

20

04

00

60

08

00

10

00

flood

landslide

disaster

marana

srilanka

kalutara

24th May 2016

keyword: flood

time

2017-04-11 2017-04-16 2017-04-21 2017-04-26 2017-05-01 2017-05-06 2017-05-11 2017-05-16 2017-05-21 2017-05-26 2017-05-31

02

00

40

06

00

80

01

00

0

Global

Srilanka

24th May 2016

Keyword: landslide

time

2017-04-11 2017-04-16 2017-04-21 2017-04-26 2017-05-01 2017-05-06 2017-05-11 2017-05-16 2017-05-21 2017-05-26 2017-05-31

05

01

00

15

0

Global

Srilanka

24th May 2016

keyword: disaster

time

2017-04-11 2017-04-16 2017-04-21 2017-04-26 2017-05-01 2017-05-06 2017-05-11 2017-05-16 2017-05-21 2017-05-26 2017-05-31

01

00

20

03

00

40

05

00 Global

Srilanka

24th May 2016

keyword: marana

time

2017-04-11 2017-04-16 2017-04-21 2017-04-26 2017-05-01 2017-05-06 2017-05-11 2017-05-16 2017-05-21 2017-05-26 2017-05-31

05

01

00

Global

Srilanka

24th May 2016

keyword: Sri Lanka

time

2017-04-11 2017-04-16 2017-04-21 2017-04-26 2017-05-01 2017-05-06 2017-05-11 2017-05-16 2017-05-21 2017-05-26 2017-05-31

01

00

20

03

00

40

0

Global

Srilanka

24th May 2016

keyword: Kalutara

time

2017-04-11 2017-04-16 2017-04-21 2017-04-26 2017-05-01 2017-05-06 2017-05-11 2017-05-16 2017-05-21 2017-05-26 2017-05-31

05

10

15

Global

Srilanka

24th May 2016