Rainfall Trend Analysis in Uma Oya Basin, Sri Lanka, and Future Water Scarcity Problems in Perspective of Climate Variability

Table 2

Results of Mann–Kendall’s test and Sen’s slope estimator test for seasons.

Rain gauge station	Rainfall season	Significant (S)/insignificant (IS)	Sen’s slope Qi (mm/season in year)
Dyraaba Estate	1^st	IS	NA
	SW	IS	NA
	2^nd	IS	NA
	NE	IS	NA
Hilpankandura Estate	1^st	IS	NA
	SW	IS	NA
	2^nd	IS	NA
	NE	IS	NA
Kirklees Estate	1^st	S	16.1
	SW	IS	NA
	2^nd	IS	NA
	NE	IS	NA
Ledgerwatte Estate	1^st	S	13.6
	SW	IS	NA
	2^nd	IS	NA
	NE	IS	NA
Welimada Group	1^st	S	5.5
	SW	IS
	2^nd	IS
	NE	IS

1^st: 1^st intermediate season; SW: southwestern monsoon; 2^nd: 2^nd intermediate season; NE: northeastern monsoon.