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

Table 4

Comparison results for monthly rainfalls for Uma Oya catchment.

Month	Trends
	Dyrabba		Hilpankandura		Kirklees		Ledgerwatte		Welimada
	Statistical	Graphical	Statistical	Graphical	Statistical	Graphical	Statistical	Graphical	Statistical	Graphical
Jan	No	No	No	No	No	No	No	No	No	No
Feb	No	No	No	No	No	No	No	No	No	No
Mar	No	Yes—up	No	Yes—up	Yes—up	Yes—up	Yes—up	Yes—up	Yes—up	Yes—up
Apr	No	No	No	No	No	No	No	No	No	No
May	No	Yes—up	No	No	No	No	No	Yes—up	No	No
Jun	No	No	Yes—down	No	No	No	No	No	No	Yes—down
Jul	No	Yes—down	No	Yes—down	No	No	No	No	No	No
Aug	No	No	No	No	No	No	No	No	No	No
Sep	No	No	No	Yes—down	No	No	No	No	No	No
Oct	No	No	No	No	No	Yes—up	No	Yes—up	No	No
Nov	No	No	No	No	No	No	No	No	No	No
Dec	No	Yes—up	No	No	No	Yes—up	No	Yes—up	No	No