Abstract
Fuleli canal takes off from left bank of river Indus and passes through Hyderabad city. There are five main entry points where Hyderabad municipal Sewage is added to Fuleli canal. The water discharge at each entry point was calculated and water quality was examined in terms of chemical oxygen demand (COD), biological oxygen demand (BOD), dissolved oxygen (D.O) total, filterable/nonfilter able, volatile and fixed residues, to calculate load of residues/day, month and year added to Fuleli canal. Fuleli canal was also sampled at seven different locations to cover the region. Total residues added to Fuleli canal were calculated to 2.2x10(6) to 1.2x10(4) tonnes/year. The effect of residues added and COD during low and high water discharge in Fuleli canal was calculated. Some of the residue were lost to bottom sediments but there was a positive shift in the base line during its travel from Hyderabad city. The effect was more pronounced during low water discharge.