Before it became a hi-tec city, Hyderabad was famously known as the city of lakes. There are over 532 water bodies in and around the state capital with Hussainsagar Lake being the most prominent one. However, rapid urbanisation in the past few decades has all but destroyed the water bodies in the city. The unending discharge of domestic and industrial effluents and sewerage has turn-ed the once-pristine lakes into cesspools. All this has also caused widespread ecological degeneration.

Increasing quantities of atmospheric anthropogenic fixed nitrogen entering the open ocean could account for up to about a third of the ocean's external (nonrecycled) nitrogen supply and up to ~3% of the annual new marine biological production, ~0.3 petagram of carbon per year. This input could account for the production of up to ~1.6 teragrams of nitrous oxide (N2O) per year.


The Dutch canal wetland system in Sri Lanka is an important wetland area for shrimp farming and has become a promising foreign exchange earner. However, shrimp farming in the Dutch Canal is largely unplanned and un-coordinated with more than 1,300 farms working in an area of 3,750 hectares.

This report analyses the impacts of climate change on eutrophication in the northern waters of the Baltic Sea. Two scenarios are presented. The first scenario, the Climate Change Scenario, assesses the impacts of predicted climate change under circumstances where no additional

Nitrogen is an important nutrient in domestic and industrial wastewater and its elevated concentration in the wetland promotes explosive growth of algae. The decomposition of the algae leads to an excessive growth of bacteria, utilizing and dissolved oxygen from water. This process of rapid algal growth leading to oxygen-starved waters is known as eutrophication.

This document is intended to provide an overview of the major components of surface and ground water quality and how these relate to ecosystem and human health. Local, regional, and global assessments of water quality monitoring data are used to illustrate key features of aquatic environments, and to demonstrate how human activities on the landscape can influence water quality in both positive and negative ways. Clear and concise background knowledge on water quality can serve to support other water assessments.