Variability and Trend of Annual Maximum Daily Rainfall in Northern Algeria

Table 2

values and Tau of Mann-Kendall test, the slope () of linear regression analysis, and AMDR contribution to AR over the period after 1970 in the north of Algeria.

Number	Station	Mann-Kendall test		Linear regression	AMDR contribution to AR
		value	Tau	Slope ()	Date of change	% deficit (−) or surplus (+)
1	Pierre du chat	0.167	−0.151	+0.118	2001	+34.9
2	Meffrouche	0.078	−0.193	−0.872	Complex
3	Bensekrane	1.000	+0.002	+0.024	1987	+41.2
4	Ras El Ma	0.002	+0.022	+0.353	1999	+22.9
5	S. A. Benyoub	0.374	+0.104	+0.286	1987	+25.3
6	Sarno	0.047	−0.217	−0.427	Complex
7	Hassi Daho	0.305	−0.114	−0.027	1997	+27.8
8	Cheurfas	0.787	−0.034	+0.158	1986	+29.6
9	Ain El Hadjer	0.822	−0.029	−0.140	1988	−17.4
10	Ghriss	0.874	−0.024	−0.089	1983	+42.6
11	Maoussa	0.287	+0.128	+0.335	Complex
12	Oued El Kheir	0.928	+0.011	+0.032	1997	+18.9
13	Bekhedda	0.687	+0.051	+0.061	1991	+18.3
14	Meured	0.240	−0.129	−0.437	Complex
15	Djebabra	0.001	−0.368	−1.223	1985	−22.7
16	Ameur El Ain	<10	−0.431	−0.802	Complex
17	Kolea	0.574	−0.062	−0.045	1990	+07.9
18	Ouzera	0.084	−0.189	−0.588	No trend
19	Hamiz-D9	0.372	−0.102	−0.349	Complex
20	Lakhdaria	0.200	−0.145	−0.301	1990	+8.5
21	K’sob	0.778	−0.036	−0.057	1981	+18.4
22	Sidi Yahia	0.577	+0.066	+0.034	1987	−18.8
23	Batna	0.576	+0.063	+0.093	No trend
24	El Milia	0.363	+0.101	+0.285	1981	+49.9
25	Ain Tinn	0.651	+0.111	−0.166	1985	+12.2
26	Timgad	0.402	+0.094	+0.275	1992	+10.0
27	Chelia	0.013	+0.265	+0.664	No trend
28	Zardasas	0.357	+0.101	+0.293	1979	+29.6
29	Ain Mimoun	0.807	−0.028	+0.042	1986	−11.01
30	Helioplolis	0.200	+0.140	+0.425	1991	+28.1
31	Ain Beida	0.944	−0.009	−0.151	1989	−12.1
32	Ain Berda	0.032	+0.232	+0.601	1987	+14.2
33	Bouchegouf	0.094	+0.183	+0.411	1998	+33.2
34	Ain Kerma	0.551	−0.066	−0.255	Complex
35	Ain Assel	0.142	+0.161	+0.345	1990	+14.2

Trend statistically significant at 5% level.