Detecting Variation Trends of Temperature and Precipitation for the Dadu River Basin, China

Table 5

Trend and regional averages of annual and monthly precipitation.

Time scale	Insignificant increase	Significant increase	Percent increase	Insignificant decrease	Significant decrease	Percent decrease	Regional averages (mm/decade)
Annual	7	2	64.3	4	1	35.7	2.71
Jan	12	0	85.7	2	0	14.3	0.16
Feb	7	1	57.1	6	0	42.9	0.24
Mar	8	6	100	0	0	0	1.98
Apr	6	6	85.7	2	0	14.3	2.65
May	11	0	78.6	3	0	21.4	1.97
Jun	6	1	53.8	6	0	46.2	1.06
Jul	5	0	38.5	5	3	61.5	−3.65
Aug	10	1	78.6	3	0	21.4	2.60
Sep	1	0	7.7	8	4	92.3	−4.13
Oct	7	1	61.5	4	1	38.5	0.04
Nov	6	0	42.9	8	0	57.1	−0.11
Dec	5	0	38.5	7	1	61.5	−0.14

Percentage more than 75 is considered as significant and made boldface.