Table 2 Dates in which the water level data exceeded the danger water level (16 m) of Kelantan River—the data are obtained from the Guillemard Bridge station from 01/01/2000 to 13/10/2010.

From: Using persistent homology as preprocessing of early warning signals for critical transition in flood

No

Date of flood events

No

Date of flood events

1

23/11/2000

7

12/02/2006–13/02/2006

2

24/12/2001–25/12/2001

8

08/01/2007

3

10/12/2003–11/12/2003

9

08/12/2007–18/12/2007

4

11/12/2004–14/12/2004

10

30/11/2008

5

24/11/2005

11

04/01/2009–05/01/2009

6

18/12/2005

12

06/11/2009–07/11/2009