Suitability Assessment of Surface Water Quality for Irrigation: A Case Study of Modjo River, Ethiopia

Table 10

Loadings of fifteen variables ( ≤ 0.001) on Varimax-rotated principal components.

Parameters	Components
	1	2	3	4
EC	0.977	−0.145	−0.133	0.076
Sodium	0.864	0.404	−0.261	0.140
pH	0.695	−0.677	−0.211	−0.117
Bicarbonate	0.990	0.002	0.137	−0.005
Carbonate	0.990	0.027	0.134	0.000
Potassium	0.999	−0.016	0.023	0.036
Phosphate	0.961	−0.053	0.221	0.136
Nitrite	−0.692	−0.357	−0.005	0.623
Calcium	0.134	0.378	0.656	−0.636
Ammonia	−0.334	−0.757	−0.165	−0.399
Chromium	−0.320	0.917	−0.234	−0.049
Magnesium	−0.622	0.053	0.644	0.354
Boron	0.767	0.106	0.561	0.268
Sulphate	0.171	0.874	−0.382	0.065
Chloride	0.961	−0.159	−0.197	0.097
Eigen value	5.517	3.133	1.643	1.223
Total % variance	48.013	20.887	10.954	8.154
Cumulative % variance	48.013	68.9	79.854	88.008