basin is occupied by alluvial of Malir River which is basically a seasonal river but becomes
perennial within the limits of Karachi due to the continuous flow of untreated sewage and
industrial effluents through its basin into the Arabian Sea. The data obtained during this
study shows that the most down stream parts of the river are grossly polluted due to the
inclusion of sewage and industrial wastes. Present data shows that pollution has not only …