B. Aravind Kumar

Chennai: The master plan for eco-restoration of the Adyar estuary is ready and work is expected to begin in a month.

MUMBAI: The survey of coastal waters suggests that the influx of industrial waste into inner estuarine zones-tidal areas where the sea meets rivers-should be discouraged for new industries. Stringent measures are also suggested for the treatment of effluents that are presently released into the sea without any controls.

The temporal and spatial distribution of salinity, DO, BOD, turbidity, pH, hardness and dissolved nutrients of surface water collected from different points of Dhamra estuary were measured during February-2007 to January-2008. The pH of water was alkaline throughout the year. The salinity, conductance, hardness increased towards the river mouth as compared to inland stations.

Recession of the Himalayan glaciers is a major concern today with IPCC

Bacterial isolates from water and sediment samples from freshwater, estuarine and marine regions were tested for their growth in the presence of different concentrations of arsenic.

Water characteristics of Kandla creek, monitored seasonally from 2002 to 2006 at four locations (mouth, cargo jetty, oil jetty and junction), indicated significant increases in nutrients, petroleum hydrocarbons (PHc) and phenols from anthropogenic additions, while increases in turbidity, total suspended solids (TSS) and salinity from natural effects.

Manakkudy estuary, located on the South-West coast of India has production of seaweeds to an amount of 15.59 kg/m2/yr. Four different types of seaweeds viz., Chaetomorpha aerea, Enteromorpha compressa, Gracilaria verrucosa and Hypnea musciformis were observed in this estuary. Highest production of biomass (C. aerea = 842.33

This study documents the deteriorating riverine environment of Sindh. Previous studies have also highlighted this issue but the referencing and documentation is generally fragmentary.

The study on physico chemical characteristics of estuary (Rajakkamangalam) water samples were collected in four sampling stations were studied in 2001.

Studies on the environmental distribution of radionuclides, namely 226 Ra and 228 Ra are important in the context of external and ingestion hazards evaluation. The Cochin backwater, located in the south-west coast of India is a potential sink for anthropogenic inputs of natural radionuclides. The estuary in its surroundings is located downstream of industrial complexes.

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