Water Quality Indices (WQI) - Water Quality Management: Assessment and Interpretation - page 26

opinions and modify their choices, if desirable. However, little changes were noted
in the modi ed responses.

Finally, the parameters which had emerged from the second questionnaire as
being the most signi

cant were presented that curves assigning variation in water
quality for different water quality parameter values should be drawn for each
parameter were requested from the panel. Two of these graphs are indicated in
Figs. 3.1 and 3.2 .Ineach figure, the solid line represents the arithmetic mean of the

all of the respondents ' curves, while the dotted lines bounding the shaded area

Fig. 3.1 Functional
relationship for dissolved
oxygen

Fig. 3.2 Functional
relationship for BOD