Seasonal and Spatial Variation of Dissolved Oxygen and Nutrients in Padaviya Reservoir, Sri Lanka

Table 3

Principal component analysis of surface water: pH, temperature, conductivity, dissolved oxygen, ammonia, reactive phosphate, nitrate, and nitrite.

Variable	PC1	PC2	PC3	PC4
pH	0.370	0.371	0.166	0.612
Temperature	0.290	0.041	−0.688	−0.411
Conductivity	0.007	0.560	0.475	−0.623
DO	0.364	−0.378	0.211	−0.235
Ammonia	−0.476	−0.019	−0.060	0.067
Phosphate	0.013	−0.633	0.325	−0.081
Nitrate	−0.454	0.049	−0.273	0.003
Nitrite	−0.463	−0.012	0.214	−0.036