Assessment of a Physicochemical Indexing Method for Evaluation of Tropical River Water Quality

Table 8

The classes of water quality based on Euclidean distance and the indexing methods of DOE-WQI and modified DOE-WQI (the number refers to the score of WQI).

ST

DOE-WQI

Classification with Euclidean distance (based on 6 parameters of original DOE-WQI)

Modified DOE-WQI

Classification with Euclidean distance (based on 6 parameters of modified DOE-WQI)

Dec

Jan

Mar

Dec

Jan

Mar

Dec

Jan

Mar

Dec

Jan

Mar

1

91 (II)

80 (II)

87 (II)

II

II

II

77 (II)

71 (III)

73 (III)

III

II

IV

2

91 (II)

82 (II)

83 (II)

II

II

II

75 (II)

73 (III)

70 (III)

IV

II

IV

3

89 (II)

82 (II)

82 (II)

II

II

II

74 (II)

75 (II)

69 (III)

IV

II

IV

4

88 (II)

82 (II)

81 (II)

II

II

III

77 (II)

68 (III)

64 (III)

IV

IV

IV

5

94 (I)

73 (III)

76 (III)

I

II

II

80 (II)

66 (III)

62 (III)

IV

IV

IV

6

82 (II)

73 (III)

82 (II)

II

V

II

67 (III)

64 (III)

63 (III)

IV

III

IV

7

89 (II)

78 (II)

74 (III)

I

II

III

75 (II)

62 (III)

64 (III)

IV

III

IV

8

87 (II)

72 (III)

80 (II)

II

III

II

76 (II)

62 (III)

65 (III)

III

III

IV

9

85 (II)

78 (II)

83 (II)

II

I

I

73 (III)

70 (III)

70 (III)

III

III

IV

10

91 (II)

62 (III)

65 (III)

I

II

I

77 (II)

52 (IV)

53 (IV)

IV

IV

V

11

71 (III)

66 (III)

62 (III)

II

II

I

60 (III)

55 (IV)

53 (IV)

IV

IV

IV

12

70 (III)

67 (III)

59 (III)

I

II

I

60 (III)

53 (IV)

48 (IV)

IV

IV

IV

13

64 (III)

73 (III)

78 (II)

II

I

II

50 (IV)

63 (III)

63 (III)

IV

IV

IV

14

83 (II)

77 (II)

77 (II)

II

I

I

69 (III)

67 (III)

62 (III)

III

IV

IV

15

80 (II)

77 (II)

73 (III)

II

I

II

65 (III)

66 (III)

59 (III)

IV

IV

IV

16

83 (II)

65 (III)

71 (III)

II

V

III

70 (III)

55 (IV)

54 (IV)

IV

IV

IV

17

76 (II)

75 (II)

78 (II)

II

II

II

66 (III)

65 (III)

62 (III)

IV

IV

IV

18

77 (II)

64 (III)

69 (III)

I

II

II

66 (III)

52 (IV)

58 (III)

IV

IV

IV