Physiography

However, increasing anthropogenic intervention in the recent times appears to be contributing to terrain instability in addition to natural factors, as observed by increasing frequency and magnitude of landslides since 1970.

During August and September 2010, Uttarakhand Himalaya witnessed large-scale slope destabilization, particularly along the roads where widening work was in progress leading to huge damage. The cause of regional-scale landslides has been attributed to exceptionally high rainfall in the region during September. When the average rainfall for the month of August and September from 2000 to 2009 is compared with rainfall data of the same period of 2010, it was found that in September 2010, 336 per cent higher rainfall was received by the area. However, the question that arises is: was it unusual rainfall-induced calamity or a result of human intervention?

It explores the understanding of the local controls on the retreat of glaciers of the Baspa valley in Himachal Pradesh. The geomorphic records mapped are accumulation zone, exposed ablation zone, moraine-covered ablation zone, snout, deglaciated valley, lateral moraine, medial moraine, terminal moraine and hanging glacier.

Fluoride is essential for normal bone growth, but its higher concentration in drinking water poses great health problems and fluorosis is common in many parts of India.

The paper informs that the conventional wisdom that ‘more forest is always better’ has dominated policy making in the management of forested watersheds. In the context of the supposed hydrological regulation service provided by forest ecosystems, however, hydrologists have debated this assumption for more than two decades.

Gujarati newsletter brought out by ACT Kutch, for admirers of the Hamirsar lake and its environs

 Mountain areas and communities are susceptible to climate change. This work also yielded evidence of the coping strategies developed by the communities to deal with an unprecedented and only partially understood threat. This paper describes these strategies and attempts to assess the vulnerability of the communities in each valley.

The study on “Snow and Glacier Studies”  was taken up by the Space Applications Centre, Indian Space Research Organisation (ISRO) and executed in collaboration with fourteen research organizations and academic institutions of the country, at the behest of the Ministry of Environment and Forests.

 Himalayan mountains contain important natural resources of frozen fresh water in the form of snow and glaciers. These glaciers are unique as they are located in tropics, high altitude regions, predominantly valley type and many are covered with debris.

The great northern plains of India sustain on the perennial melt of snow and glaciers meeting the water requirements of agriculture, industries, domestic sector even in the months of summer when large tracts of the country go dry. Therefore, it is important to monitor and assess the state of snow and glaciers and to know the sustainability of glaciers in view of changing global scenarios of climate and water security of the nation. Any information pertaining to Himalayan glaciers is normally difficult to be obtained by conventional means due to its harsh weather and rugged terrains.

Jog falls in Western Ghats

 These dams have had a profound negative impact on communities and ecology upstream and downstream. While promised benefits of these dams (irrigation, hydro-power or flood control) have been overstated, numerous interrelated and complex negative impacts have simply not been studied or documented. Nonetheless, communities and ecosystems continue paying huge prices of these impacts.

This season in the region is commonly referred to as – Barh (flood). For centuries local people have treated it as ‘a way of life’, and found ways to deal with it. Post independence, this ‘way of life’ gradually transformed into an assured annual devastation. The once self-sufficient communities in the flood plains have been relegated to being highly dependent on sources external to the village for their survival during floods.

Atmospheric depressions sometimes initiate tropical cyclones in the pre- and post-monsoon season in the Bay of Bengal, which move to land and create havoc. Their intensity and pattern vary individually.