Water Quality Indices (WQI) - Water Quality Management: Assessment and Interpretation - page 36

Thus, the different monthly measured values were selected in each station (Table 3.7 ).
Figures 3.8 and 3.9 show the results of the method based on drinking purposes and
agriculture putting these parameter data into Eq. 3.2 Accordingly, when a numerical
index is high the station is more critical, the ST9 station with the 104 index for the
agriculture and the ST6 station with 2909 index for drinking purposes were at the
critical situation. The SSW2 station with BCWQI method was 38 for the agriculture
and 62 for drinking purposes. The two stations were the suitable water quality.
Generally, the river

is water for drinking purposes is not at the suitable situation;
therefore, so, for drinking purposes need to be treated. Except for the ST9 station, the
river

'

' s water for agriculture uses was in the media situation.

120

100

80

60

40

20

0

Station No.

Fig. 3.8 The results of BCWQI method for of Se d-Rud River regarding drinking uses

3500

3000

2500

2000

1500

1000

500

0

Station No.

Fig. 3.9 The amounts of BCWQI of the Sefid Rud River for 2005 2007 data regarding irrigation

-

uses