Analysis of Variation Trends in Precipitation in an Upstream Catchment of Huai River

Table 2

Values of Z of the M-K test and the Kendall slope β for annual and seasonal precipitation in different stations.

Station	Spring		Summer		Autumn		Winter		Annual
	Z	β (mm/a)	Z	β (mm/a)	Z	β (mm/a)	Z	β (mm/a)	Z	β (mm/a)
Baicaoping (BCP)	−0.06	−0.031	0.08	0.104	−0.72	−0.441	−0.25	−0.038	−0.46	−0.909
Baiguishan (BGS)	−0.39	−0.310	2.34**	3.016	−1.40	−1.017	1.43	0.195	0.89	1.199
Baofeng (BF)	−0.63	−0.525	0.95	1.331	−1.33	−0.931	0.18	0.049	−0.01	−0.008
Baohe (BH)	−0.16	−0.185	1.74*	3.648	−1.30	−1.133	0.68	0.190	0.82	2.050
Dadian (DD)	−0.09	−0.027	0.78	1.411	0.01	0.000	0.65	0.114	0.54	1.071
Daying (DY)	−0.36	−0.224	0.95	1.061	−1.14	−0.758	0.63	0.139	0.17	0.340
Dushu (DS)	−0.21	−0.144	0.51	0.587	−0.36	−0.278	−0.19	−0.019	0.11	0.114
Erlangmiao (ElM)	−0.19	−0.125	−0.81	−1.372	−0.30	−0.239	0.20	0.041	−1.14	−2.235
Fudian (FD)	0.00	0.000	−0.89	−1.152	−0.07	−0.037	0.91	0.133	−0.99	−1.605
Guaihe (GH)	−0.83	−0.523	1.63	2.369	−0.90	−0.719	0.37	0.064	0.38	0.704
Guanzhai (GZ)	−1.12	−0.686	0.78	1.278	−1.15	−0.941	−0.15	−0.054	0.23	0.355
Handian (HD)	−0.59	−0.477	1.82*	2.242	−2.17	−1.239	1.05	0.203	0.99	1.575
Hekou (HK)	−0.76	−0.536	1.31	1.712	−0.50	−0.334	0.10	0.028	0.35	0.830
Huangzhuang (HZ)	−0.80	−0.456	−1.26	−1.355	0.27	0.089	0.30	0.052	−1.48	−1.863
Jizhong (JZ)	0.96	0.745	1.55	2.512	−0.83	−0.683	1.14	0.245	1.69*	4.332
Jiliaojie (JLJ)	−0.85	−0.700	−0.58	−0.717	−2.14**	−1.689	0.34	0.076	−1.28	−3.251
Jiaxian (JX)	0.03	0.026	−0.44	−0.528	−0.79	−0.428	0.49	0.070	−0.47	−0.519
Jintangzhai (JTZ)	−0.06	−0.034	1.35	1.721	−0.56	−0.423	−0.53	−0.089	0.52	0.885
Lianghekou (LHK)	−0.96	−0.405	−1.24	−1.163	−0.79	−0.512	−0.45	−0.059	−2.13**	−2.384
Linruzhen (LRZ)	−0.62	−0.268	−0.67	−0.624	−0.12	−0.059	0.83	0.117	−0.70	−0.856
Louzigou (LZG)	−0.78	−0.376	−0.88	−0.774	−0.41	−0.290	0.24	0.031	−0.93	−1.523
Lushan (LS)	−0.06	−0.048	0.54	0.736	−0.03	−0.017	−0.18	−0.043	−0.21	−0.412
Luohe (LH)	−0.83	−0.492	0.25	0.221	−0.57	−0.384	−1.08	−0.224	−0.98	−1.662
Penghe (PH)	−0.28	−0.307	2.53**	4.911	−1.19	−1.342	0.31	0.068	1.03	2.532
Pinggou (PG)	−1.58	−2.410	0.59	1.218	−1.48	−1.490	0.17	0.069	−0.37	−1.023
Ruzhou (RZ)	−0.33	−0.167	−0.17	−0.135	−0.07	−0.046	−0.30	−0.039	−0.25	−0.213
Shenhou (SH)	0.16	0.125	−0.84	−1.083	−0.22	−0.111	0.57	0.090	−0.82	−1.253
Silidian (SLD)	−0.32	−0.151	1.90*	3.167	0.18	0.095	1.24	0.254	1.14	2.539
Wawu (WW)	0.57	0.315	−0.64	−0.868	−0.09	−0.032	0.94	0.166	−0.97	−1.436
Xiagushan (XGS)	0.03	0.024	1.82*	3.033	−1.39	−1.175	0.15	0.022	0.90	1.635
Xiatang (XT)	0.19	0.139	0.76	1.307	0.01	0.003	0.03	0.004	0.27	0.521
Xiaoshidian (XSD)	−0.55	−0.257	0.26	0.466	−1.02	−0.700	−0.13	−0.027	−0.27	−0.549
Xiangcheng (XC)	−0.25	−0.098	−0.67	−0.768	−0.73	−0.475	−0.41	−0.065	−0.96	−1.116
Zhaopingtai (ZPT)	0.42	0.317	3.01***	4.444	−0.82	−0.726	0.61	0.153	1.62	3.347
Zhiping (ZP)	2.34**	2.087	2.20**	4.200	−0.44	−0.347	4.82***	1.217	2.98***	7.476
Zhiyang (ZY)	0.12	0.090	−0.11	−0.101	−0.23	−0.197	1.68*	0.292	0.04	0.027
Zhongtang (ZT)	0.00	0.000	0.75	1.123	−1.35	−1.100	0.00	0.000	0.01	0.000
Ziluoshan (ZLS)	0.32	0.114	0.00	0.000	−0.15	−0.105	1.18	0.165	−0.22	−0.289

∗Trends statistically significant at the 90% confidence level, ∗∗trends statistically significant at the 95% confidence level, ∗∗∗trends statistically significant at the 99% confidence level.