Effect of river discharge fluctuation on water quality at three rivers in Endau catchment area, Kluang, Johor.

The water quality and river discharges was surveyed at three rivers in Endau cathment area
(Sungai Dengar, Madek and Mengkibol) which was located in Kluang, Johor from November 2008
to August 2009 by using in-situ water quality measurement instruments and current meter. In-situ
water quality measurement instruments were used to measure water quality and current meter was
used to measure river water discharges. A total of five water quality parameters were measured
namely pH, dissolved oxygen, conductivity, temperature and turbidity. Based on the results, it shows
that there is a negative relationship between the values of all water quality variables measured (except
turbidity) and discharge. Here we can suggest that, high water discharge will not influence the
concentrations of pH, dissolved oxygen, conductivity and temperature except turbidity. Water becomes
more turbid with the increased volume of water or with the increased of water discharge and clearer
or less turbid during low water.