Land Use Land Cover Changes in Detection of Water Quality: A Study Based on Remote Sensing and Multivariate Statistics

Table 8

The physicochemical and biological properties classified by the -mean method.

Variable (unit)	Frequency	Cluster 1	Cluster 2	Cluster 3
Turbidity (NTU)	Mean; range	−0.63; −0.71~−0.55	1.56; 3.07~0.05	−0.4; −0.56~−0.24
Dissolved solid (mg/l)	Mean; range	0.36; 0.66~0.06	−0.33; −0.37~−0.28	0.71; −0.32~1.73
Electrical conductivity (uS)	Mean; range	0.26; 0.55~−0.03	−0.39; −0.42~−0.36	0.92; −0.39~2.23
Salinity (ppt)	Mean; range	0.13; 0.21~0.04	−0.42; −0.48~−0.36	0.93; −0.41~2.26
Dissolved oxygen (mg/l)	Mean; range	−0.77; −0.71~−0.83	0.49; 0.91~0.07	−0.22; −0.11~−0.33
Biochemical oxygen demand (mg/l)	Mean; range	0.16; 0.23~0.08	−0.06; −0.13~0.01	−0.11; −0.13~−0.08
Chemical oxygen demand (mg/l)	Mean; range	0.54; 0.56~0.52	0.27; 0.62~−0.08	−0.53; −1.51~0.46
Total suspended solid (mg/l)	Mean; range	−0.66; −0.77~−0.55	3.54; 7.09~−0.01	−0.09; −0.32~0.15
Arsenic (mg/l)	Mean; range	0.32; 0.37~0.27	−0.33; −0.61~−0.04	0.06; −0.12~0.24
Mercury (mg/l)	Mean; range	8.67; 10.02~7.31	−0.13; −0.15~−0.11	−0.13; −0.15~−0.11
Zinc (mg/l)	Mean; range	−0.51; −1.04~0.02	−0.53; −1.04~−0.02	0.49; 0.85~0.12
Iron (mg/l)	Mean; range	−0.9; −1.06~−0.74	−0.22; −0.58~0.13	0.79; 2.29~−0.72
E. coli (cfu/100 ml)	Mean; range	−0.37; −0.58~−0.16	−0.28; −0.51~−0.05	−0.07; −0.48~0.35
Total coliform (cfu/100 ml)	Mean; range	0.62; −0.44~1.68	−0.32; −0.63~−0.01	4.33; 8.81~−0.16
Number of samples		4	2	3
Sampling stations		7, 8, 9	1, 2	3, 4, 5, 6