Disappearing Lakes cover

Vol no. 7 Issue No. 45

Inside this issue

First Report

Two Disappearing Lakes

By: Sulagna Chattopadhyay and Dr. Debapriya Dutta

I shut my eyes, there it was, it’s clear waters rippling around my ankles, as I idled away on the fisherman’s oblong boat. But alas, my twitching nose, detecting the veritable stink of decayed vegetation, broke my reverie and landed me on a muddy bank. Where was the water, I gasped, as I stared at the remnant limbs of one of the most beautiful lakes, Damdamma, upon the shores of whom, many years ago, I had found true love. Alarmed, upset and indignant I began my search – to prove this drastic decline with data, and shake everybody up to stop this unwarranted disappearing act.

Pollution Hotspots

Pollution Control in Problem Areas

By: Staff Reporter

As a part of environmental management programme, the Central Pollution Control Board (CPCB), New Delhi, has identified 24 problem areas in the country where environmental pollution is critical.

Edible uses of Algae

By: Staff Reporter

Anyone who has walked over slippery rocks along limped pools will be aware of group of organisms known as algae. Algae are simplest photosynthetic plants dwelling in water.

Traveller's Diary

Trek to Valley of Flowers Uttarakhand

By: Dr. S. Srinivasan

Valley of Flowers had been eluding us for many years, owing primarily to the best time recommended for visit, which is July 15 to August 15 - just when school/college terms have begun.

Type of Lakes

By: Dr. N. Prasad

The mesmerising land called India, unsurpassed in natural and man made creations, provides opportunities of exploration, singularly pristine. Lakes, perhaps a lesser diva to the gushing rivers, are waiting in the wings to pirouette before you, allow its blue waters to ripple against your ankle and hold your attention for a little while longer, before untold pollution and damage tarnishes their beauty forever.

Save our Lakes

By: Staff Reporter

Lakes and wetlands possess the capability to moderate floods and droughts by retaining surface runoffs and enabling groundwater recharge. It also acts as silt traps which fuel the aquatic ecosystem with fresh nutrients. The carbon sequestration by lakes and wetlands regulate global climate and wetlands serve as both sink and source of greenhouse gas emissions.

Reports

Human Development Report ranks India at 128

By: Staff Reporter

India’s rank slips by two places from 2006 Human Development Indicator (HDI). The Report asserts that although large scale anomalies gain international recognition, many local climatic disasters goes unreported.

Forest Fires

By: Staff Reporter

Human civilisation has been based on the systematic and controlled use of fire. Raging fires can wreak havoc on fragile ecosystems and destroy all that comes in its path, including precious life.

Renewable Energy

Renewable Energy News

By: Staff Reporter

The Story of Mapping India

By: Staff Reporter

The Great Trigonometrical Survey were spread over 1,600 miles in length along the meridian and, at places, 1,200 miles in latitude, in order to cover the entire country. This work took approximately fifty years to complete and is hailed as one of the most stupendous works in the history of science.

Biogas Comes to City Kitchens

By: Gagandeep Kaur

There are ways you can contribute to the environment even as you stand in the kitchen. Rather than throw the banana peels or spinach stems or other biodegradable waste into the dustbin, you could toss them into the Compact Biogas Plant to create pollution free methane gas and in effect, help conserve planet earth’s depleting fossil fuels.

In brief

Term Power

What is ...

The use of orbiting spacecraft (in addition to traditional aircraft of balloons) for the purpose of data collection. A wide variety of different kinds of mapping can be accomplished by such means. Use of long wavelengths allows a surface (such as that of a planet) to be inspected even through layers of clouds.

An upfold in deformed rock strata, with the oldest beds at the centre of the structure. Anticlines are usually separated from each other by down folds or synclines.

The layer inside the Earth that lies immediately below the lithosphere. The asthenosphere is characterised by low seismic wave velocities (that is, a high degree of seismic attenuation) and low rigidity. It is thought to be a zone in which partial melting of rock in the Earth’s mantle occurs.

The period in the history of the Earth from about 360 million to 286 million years ago, towards the end of the Paleozoic era. At the beginning brachiopods and corals flourished in shallow seas, their fossils are common in limestones from that time. Later in the Carboniferous period, sandstone and shale were deposited in river mouths with submerged swamp forests of tree ferns forming the coal that we mine today.

The southern part of super continent of Pangea, comprising the ancestral continents of Antarctica, Australia, India, Africa and South America. Gondwanaland finally broke up during the Mesozoic era and continental drift carried them apart ever since.

A seismic discontinuity located at the interface between the Earth’s crust and the mantle. Beneath the continents it is encountered at depths of about 35 kms and below the ocean floor at 10 kms; however, beneath some mountain belts it may plunge to 70 kms. Seismic velocities increase sharply across it.

A layer of loose rock and mineral grains that is found at the surface of planetary crusts. A regolith become a soil with the addition of organic material.

The study of sound. It includes measuring the speed of sound in various media, and how sound waves can be reflected and refracted.

A polluting mixture of smoke, fog and chemical fumes. Photochemical smog is produced under certain climatic conditions by complex photochemical reaction of sunlight with unburned hydrocarbons.

A temporarily cooler region on the photosphere of the Sun, between 1000 and 2000 degrees below that of the photosphere, which is about 6000 K, caused by a magnetic field bursting through the photosphere.

The sedentary phase in the life cycle of certain cnidarians (coelenterates), the other life form being the free swimming medusa. A polyp is cup shaped individual with a single body opening, the mouth, surrounded by stinging tentacles.

The study of the origin of species through gradual changes in ancestral groups. The most widely accepted theory today is Darwin’s theory of evolution, in which the process of natural selection acts on randomly occurring variations.

Letters