Comparison of Statistical Methods to Graphical Methods in Rainfall Trend Analysis: Case Studies from Tropical Catchments

Table 6

Comparison results for seasonal rainfalls for Denawaka Ganga catchment.

Raingauge station	Season	Statistical trend analysis	Graphical trend analysis
Allupola estate	1^st	No	No
	NE	No	No
	2^nd	Yes—upward	No
	SW	No	No
Hapugastenna estate	1^st	No	No
	NE	No	Yes—downward
	2^nd	No	No
	SW	No	Yes—downward
Galaboda estate	1^st	No	No
	NE	No	No
	2^nd	No	No
	SW	No	No
Lellopitiya estate	1^st	No	Yes—upward
	NE	No	No
	2^nd	No	No
	SW	No	No
Landsdown middle division estate	1^st	Yes—upward	Yes—upward
	NE	Yes—upward	Yes—upward
	2^nd	Yes—upward	No
	SW	No	No