Colloquium

Date : 15-05-2019
Time : 16:00:00
Speaker : Dr. Dipankar Saha
Area : DEAN'S OFFICE
Venue : K.R. Ramanathan Auditorium, PRL

Abstract

Food and drinking water security in India is critically dependent on the underlying aquifers. Presently 85% of rural drinking need, 64% of irrigation demand and more than 50% of urban water need is met from groundwater sources. About 8% of India’s GDP is directly linked to groundwater. India is the world’s largest groundwater extractor, with an estimated consumption exceeding a quarter of the global total. Relentless and unplanned extraction of groundwater, often exceeding the annual recharge, has resulted in multipronged un-desirable consequences. The most important of them is desaturation of aquifers, being manifested through declining water levels, drying up of wells and diminishing well yield. The other adverse effect is deteriorating water quality, both in terms of increasing salinity and elevated concentrations of harmful contaminants.

Date : 08-05-2019
Time : 16:00:00
Speaker : Prof. Ramesh P Singh
Area : DEAN'S OFFICE
Venue : K.R. Ramanathan Auditorium, PRL

Abstract

Natural hazards occur at any location on land, ocean and atmosphere, effects of these natural hazards have been observed in the source region and also far from the source. In recent years, efforts have been made to enhance observing systems on land, ocean and atmosphere to study characteristics of changes associated with the natural hazards using ground, borehole and satellite observations. An overview of the observing systems throughout the globe will be presented that have provided information about characteristics of land, ocean and atmosphere associated with prior, during and after occurrence of natural hazards. The dense network of observing systems in monitoring and forecast of an impending natural hazard have helped scientists to minimize loss and forecast of natural hazards. The need of dense network in India especially in the Himalayan and Indo-Gangetic plains is required to monitor and forecast of impending natural hazards. The impact of natural hazards occurring on land, ocean and atmosphere affecting all elements of earth systems have clearly shown the existence of land-ocean-atmosphere coupling.