Limnology of river Cooum with special reference to sewage and heavy metal pollution

Abstract

The physical, chemical and biological variables and pollution of river Cooum with sewage and heavy metal were studied in 4 stations within Madras city for a period of one year from August 1982 to July 1983. The physical, chemical and biological parameters presented complex pattern of variations indicating that the biotic life of Cooum river is severely affected by the excessive discharge of sewage effluents within the city limits which excessively eutrophicate the river water. The number of species and density of zooplankton are very low. Heavy metals such as iron, nickel, lead and zinc are recorded to be above permissible levels.

Seasonal Variation in the Physicochemical Characteristics and Microalgae of Selected Mangrove Ecosystems in Ernakulam

“…Irregular fluctuations observed in the carbon dioxide may result from the breakdown of organic matter. [17] Nutrients are considered as one of the most important parameters in the mangrove environment influencing growth, reproduction and metabolic activities of biotic components. Distribution of nutrients is mainly based on season, tidal conditions and freshwater flow from land [18].…”