Hydrologic Time Series Anomaly Detection Based on Flink

Table 1

Data before cleaning.

Station ID	Time	The water level	Source
12910520	27/4/2016 19:45:00	36.780	Null
12910520	27/4/2016 19:45:00	36.780	Null
12910560	27/4/2016 19:45:00	29.600	Null
12910580	27/4/2016 19:40:00	33.010	Null
60403200	27/4/2016 19:35:00	5.940	Nj34