Earth Science # Science

What is soil liquefaction? Causes, effects and measures

“A Phenomenon whereby a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other sudden change in stress condition, causing it to behave like a  liquid” is called Soil Liquefaction (Hazen,1918). There are two types of soil liquefaction. 1) Flow liquefaction 2) Cyclic Mobility  How does Soil Liquefaction Work: The soil is a mixture of soil particles that stay connected together. These particles...

Weather n Climate

Normal Rainfall Predicted for Southwest Monsoon 2018

India Meteorological Department (IMD) is issuing the forecast for the southwest monsoon seasonal rainfall (June to September) for the country as a whole in two stages. The first stage forecast is issued in April and the second stage forecast is issued in June. IMD is using state-of-the-art Statistical Ensemble Forecasting system (SEFS) which is critically reviewed and improved regularly through in-house research activities. Since 2012, IMD is also using the dynamical global climate forecasting system...

Earth Science

Volcanoes around the world – what is likely to become active

A volcano is the emission of lava, ash and gases from deep under the earth’s surface through a crack on the surface of the earth. According to the Plate Tectonic Theory, the earth’s lithosphere (which includes the crust and upper mantle) is made of tectonic plates. These tectonic plates meet at three different kinds of boundaries namely convergent, divergent and transform. Due to the movement of these plates along the boundaries or faults, tectonic activities occur. These tectonic activities...

Earth Science

When is the next ice age due?

Ice Age is one of the most famous animated film series that deals with the life and struggles of animals that had been part of the earth’s biodiversity during the ice age. What is an ice age and when is the next ice age due? Ice age, which is also known as glacial age, is the refrigeration of the earth’s climate. Ice sheets and other types of glaciers expand to cover large areas of land, beyond the Polar Regions, reaching up to the temperate zones of today. The chronology of the earth’s geological...

Earth Science

Hot water springs in India

India is a country with vast diversity in terms of geographical landforms and features. Our country is endowed with mineral wealth as also with hot and cold water springs. Hot Water Springs In India Thermal springs or hot water springs are formed due to geothermally heated water emerging onto the earth’s surface through cracks. This heat comes from deep inside the earth’s surface. In north India, Jammu and Kashmir, Uttarakhand, Himachal Pradesh and Haryana and western states such as Gujarat...

Earth Science # Science

Glacial Landforms in Relation to the Himalayas

Glaciers are represented by the flowing movement of a thick mass of ice and form as a result of the compaction or recrystallization of snow. Glaciers occur in areas whose climate favours the seasonal accumulation of snow in greater volumes than seasonal ablation. Here the seasonal accumulation of snow outpaces seasonal ablation that occurs due to loss of snow from melting, calving, evaporation and/or wind erosion. Glaciers can thus be found in Polar and Alpine Regions where temperatures can be substantially...

Technology

Heritage Sites Mapping

India is culturally very rich and diverse and has a long history. This richness and history is visible in historical architectures and monuments. India has a vast number of heritage sites that showcase India’s history and culture and thus are of great national importance. Also, many of these heritage sites get huge national as well as global attention and generate tourism opportunities. Unprecedented urbanisation, severe weathering of the monuments, encroachment around the monuments, smuggling...

Technology

Solar Power in India

Most of the people today know about the uses of solar energy and why we should use it. With the rapid depletion of conventional, non-renewable sources of energy like coal, gas and oil, finding out ways to harness and increase the production of alternate, renewable sources of energy is on the rise. Can we harness solar energy and produce solar power in India? India, being partly tropical and sub-tropical, receives sunlight all round the year. The amount of solar energy received by India is a whopping...

NRDMS # Technology

Good Governance: GIS in Law Enforcement

Catering to over 1.3 billion people, the law enforcement agencies in India face a lot of challenges. According to the United Nations Office on Drugs and Crime (UNODC), India had deployed only 138 personnel per one lakh population in 2015. India ranked 67th out of 71 countries in terms of personnel deployed to population ratio (ET, 2015). According to the Bureau of Police Research & Development, as of January 2017, India had 15,579 police stations, with 10,052 stations in urban areas, 4,998 stations...

Energy

Nuclear Power and Energy Security in India

The story of nuclear power in India began in September 1972, when the then Prime Minister Smt. Indira Gandhi visited the Bhabha Atomic Research Centre and the project to manufacture and test a nuclear bomb was given a confirmation. Following this approval, the scientists started working on converting their ideas into reality. Apart from designing, minds were also pondering over locating and preparing an appropriate test site for the project, which was commonly called ‘Smiling Buddha’. Almost...