Precipitation Trends over Time Using Mann-Kendall and Spearman’s rho Tests in Swat River Basin, Pakistan

Table 5

MK and SR tests results for monthly precipitation time series in entire basin and subbasins of Swat River.

Subbasin	Test	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.
A1	MK	0.47	0.10	0.71	−1.23	0.41	3.49	−2.88	−3.18	−0.18	1.43	2.50	0.94
	SR	0.45	0.06	0.74	−0.98	0.47	4.09	−2.99	−3.63	−0.18	1.59	2.77	0.94
A2	MK	1.07	0.80	0.16	−0.93	0.21	2.01	−3.54	−4.16	−2.02	0.00	1.87	0.62
	SR	0.95	0.72	0.01	−0.99	0.13	2.31	−3.86	−4.86	−2.24	0.11	2.00	0.63
A3	MK	2.50	1.02	−0.36	0.65	2.97	3.90	−2.97	−2.55	−0.44	3.05	2.95	2.29
	SR	2.67	0.89	−0.09	0.70	3.11	4.79	−3.54	−3.22	−0.52	3.76	3.65	2.60
A4	MK	2.37	0.88	−0.06	−0.50	1.22	1.64	−0.63	−0.83	0.00	0.20	0.50	−0.40
	SR	2.46	0.84	−0.01	−0.59	1.17	1.82	−0.59	−0.90	0.01	0.45	0.23	−0.46
A	MK	1.85	1.10	0.13	−0.62	1.23	3.69	−2.55	−3.61	−0.65	1.74	2.68	0.70
	SR	1.70	1.04	0.18	−0.79	1.27	4.22	−2.77	−4.01	−0.70	1.81	2.99	0.73

Significant trend at 5% significance level of two-tailed test.