Using Statistical Analysis to Assess Urban Groundwater in Beni Mellal City (Morocco)

Table 4

Total variance explained by each PC and the loading matrix of PCs, varimax rotation factors, and median values of cluster C₁, C₂, and C₃.

	Principal component factors								Varimax rotation factors		Median cluster values
	PC1	PC2	PC3	PC4	PC5	PC6	PC7	PC8	VF1	VF2	C1	C2	C3
EC	0.877	−0.263	0.117	−0.033	−0.148	−0.221	−0.046	0.105	0.822	0.402	701.30	697.06	1067.82
pH	−0.348	0.152	−0.320	−0.158	0.167	0.282	0.554	0.189	−0.358	−0.125	7.56	7.55	7.43
TDS	0.915	−0.188	0.078	−0.060	−0.141	−0.207	−0.042	0.045	0.800	0.482	499.70	508.00	782.36
T (°C)	0.221	0.399	−0.394	−0.222	0.537	−0.057	0.109	−0.028	−0.108	0.443	25.67	26.31	26.50
DO	−0.140	−0.054	−0.176	−0.296	−0.369	0.628	0.004	0.154	−0.066	−0.134	5.19	5.15	5.11
Ca	0.415	0.738	−0.189	0.364	−0.086	0.000	0.072	−0.016	−0.196	0.824	129.70	218.27	189.19
Mg	0.444	0.010	0.018	0.767	0.073	0.052	0.096	−0.155	0.320	0.308	44.66	60.24	60.56
Na	0.680	0.540	−0.254	0.036	−0.149	−0.081	0.108	0.158	0.133	0.858	30.16	42.85	51.56
K	0.525	0.260	−0.182	0.071	−0.180	0.345	−0.192	0.279	0.209	0.547	2.68	4.00	3.81
HCO3	0.455	−0.250	0.688	−0.061	0.019	0.016	0.017	0.090	0.504	0.125	377.22	332.35	411.73
SO4	0.115	0.697	−0.259	0.616	−0.026	0.062	0.030	−0.085	−0.389	0.589	183.00	609.06	307.64
NO3	0.390	−0.371	0.212	−0.453	0.131	0.051	0.288	−0.222	0.538	−0.008	22.91	16.19	28.62
Cl^−	0.818	0.039	−0.108	−0.358	−0.082	−0.162	0.149	0.168	0.574	0.584	56.75	50.90	97.08
Ag	−0.189	−0.468	0.199	0.356	0.098	−0.037	0.050	0.574	0.179	−0.471	59.04	58.35	58.55
Al	−0.326	0.319	0.172	−0.015	−0.632	0.027	0.262	0.145	−0.456	0.013	139.78	163.71	114.64
Ba	0.592	0.512	0.002	−0.311	0.220	0.103	0.033	0.021	0.088	0.778	123.85	140.14	158.39
Cd	0.579	−0.373	−0.159	0.145	−0.095	0.033	−0.066	0.166	0.678	0.119	1.04	1.06	2.18
Cr	−0.155	0.734	0.573	−0.102	0.023	−0.134	0.087	0.046	−0.612	0.434	3.26	3.71	2.45
Cu	−0.386	−0.222	−0.052	0.231	0.425	−0.308	0.146	0.438	−0.133	−0.425	111.65	108.82	105.09
Fe	0.079	−0.362	−0.225	0.180	−0.108	−0.169	0.610	−0.241	0.303	−0.212	227.17	233.71	286.73
Li	0.378	0.276	0.124	−0.065	0.641	0.340	−0.108	0.058	0.090	0.459	8.48	8.56	9.12
Mn	0.571	−0.182	0.475	0.173	0.009	0.224	0.307	−0.062	0.543	0.254	16.65	16.53	19.82
Ni	0.159	−0.671	−0.459	0.031	0.053	0.188	0.125	0.096	0.572	−0.385	8.96	8.00	10.27
Pb	−0.154	0.218	0.797	0.222	0.109	0.280	0.167	0.021	−0.261	0.055	3.64	3.59	3.03
Zn	−0.256	0.710	0.050	−0.335	−0.119	−0.324	0.133	0.221	−0.670	0.348	642.78	661.76	605.73
Eigenvalue	6.062	4.223	2.481	2.199	1.589	1.429	1.078	1.023
Variability (%)	24.25	16.89	9.93	8.80	6.36	5.72	4.31	4.09	20.11	19.76
Cumulative (%)	24.25	41.14	51.06	59.86	66.22	71.93	76.25	80.34	20.11	39.87

Bold values indicate strong loadings (>0.50).