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

1. Social Media Sensing
for Disaster Situation
@alramadona

2. 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

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

4. flood

5. marana

6. Sri Lanka

7. Daily Twitter users in Sri Lanka
all user
user with location data
< 50% of all user
Apr 15 May 01 May 15 Jun 01
050010001500
t
12345
user
tweet
tweet per user

8. 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
2004006008001000
flood
landslide
disaster
marana
srilanka
kalutara
24th May 2016

9. 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
02004006008001000
Global
Srilanka
24th May 2016

10. 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
050100150
Global
Srilanka
24th May 2016

11. 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
0100200300400500
Global
Srilanka
24th May 2016

12. 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
050100
Global
Srilanka
24th May 2016

13. 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
0100200300400
Global
Srilanka
24th May 2016

14. 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
051015
Global
Srilanka
24th May 2016