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Natural and Man-Made Disaster and their Impact on Environment

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❶Due to this, the rocks are under strain. The Richter scale is used to measure the intensity of earthquakes.

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English essay on man made disaster in marathi. English essay on man made disaster in hindi. English essay on nepal disaster in. English 1oo word essay on disaster management. These have adversely affected the vital sectors of our development as agriculture, communication, irrigation, power projects and rural and urban settlements.

The time and cost overrun in some cases have been enormous but their indirect impact on our economy has never been calculated. The unique geo-climatic conditions have exposed this country to natural catastrophes. Disasters can be defined as a sudden, accidental event of great magnitude that causes considerable damage to life and property. They are sudden, drastic and normally occur without any alarm or warning.

Some disasters may be short lived such as earthquakes and some other may be of long duration, such as floods. However, irrespective of the duration of a disaster, the damage in the form of deaths, injuries and losses of property is immense. The magnitude of the disasters can be judged by the fact that only during the past two decades, occurrences of floods, earthquakes, landslides, cyclones, etc. Most of the disasters have a natural origin, however, some disasters are manmade as well.

On this basis, disasters can be broadly classified into two groups: When disasters occur due to natural forces they are called natural disasters, over which man has hardly any control. Some common natural disasters are earthquakes, landslides floods, droughts, cyclones, etc.

Tsunamis, volcanic eruptions and wildfires are also included under natural disasters. These disasters cause enormous loss to life and property.

Common examples of these disasters are train accidents, aero plane crashes, collapse of buildings, bridges, mines, tunnels, etc. Some of the common natural disasters, their impact on environment, and their prevention, control and mitigation are discussed below: Ever since it came into existence 4. These pieces are called tectonic plates. These plates are in continuous motion over the mantle, which is known as tectonic movements. These tectonic processes are also responsible for the mountain building processes.

The plates that are moving past over one another are slowed by friction along their boundaries. Due to this, the rocks are under strain. When the stress on the rocks exceeds certain limits, the rocks rupture and form a fault along which the rocks are displaced during tectonic movements. This sudden rupture of the rocks releases energy in the form of earthquake waves Fig.

Thus earthquake is a form of energy, which is transmitted to the surface of the earth in the form of waves called seismic waves.

Scientists who study earthquakes are called seismologists. The instrument that records the seismic waves is called seismograph. The exact spot under the earth surface at which an earthquake originates is called the focus or hypocenter.

The point on the earth surface above the focus is called the epicenter. The Richter scale is used to measure the intensity of earthquakes. The intensity is measured on a scale of 0 to 8 and above Table The destruction, an earthquake causes, depends on its magnitude and duration or the amount of shaking that occurs.

In the last years, earthquakes around the world have killed several million people. Earthquake is one of the most catastrophic natural disasters. Massive loss of life and property occurs due to collapse of buildings.

Besides, roads, bridges, canals, electric poles, etc. Certain regions of the earth are more prone to earthquakes. These are places located in the unstable regions of the earth crust, which are subjected to tectonic activities. This is the main cause of destruction in which buildings, bridges, roads, canals and other structures are damaged. Earthquakes make sands and silts to transform from a solid to liquid state.

This also results in building collapse. It is a major hazard associated with earthquakes. The shakings of the ground and building damage often break the gas pipes and electric lines that cause fires. Tsunamis are massive sea waves that are mainly caused due to earthquakes in the ocean floor or possibly due to an undersea landslide or volcanic eruption. When the ocean floor is tilted or offset during an earthquake a set of waves is created similar to the concentric waves generated by an object dropped into the water.

These waves are massive in size and gain height as they approach the seashore. Tsunamis up to the height of 30 m are recorded Fig. Tsunamis are the most catastrophic among natural disasters as they affect a very wide geographical area. Despite the advances made by modem science, the exact time and place where an earthquake may strike cannot be predicted. Hence, the occurrence of an earthquake cannot be prevented.

However, there are certain regions that are earthquakes prone and so the administration must work before hand to minimize the damages due to occurrence of earthquakes in such areas. The control and mitigation measures in earthquake prone regions include hazard reduction programmes, development of critical facilities and proper land use planning.

Establishment of specific health care units for treating earthquake injuries Proper land use planning. Buildings such as schools, hospitals, offices, etc.

Floods are one of the most common natural disasters occurring in many parts of the world every year. Floods occur due to heavy rainfall within a short duration of time in a particular region which causes the rivers and streams to overflow.

Since most of the precipitation occurs within span of two to three months during the rainy season, most floods occur during that time. The floods in the mountainous regions due to cloudbursts or damming of streams are referred to as flash-floods. Most Popular Posts [All Time]. Short Essay on 'Dr. Abdul Kalam' Words. Short Essay on 'Mahatma Gandhi' Words.

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Aug 08,  · A disaster is a hazard resulting in an event of substantial extent causing significant physical damage or destruction, loss of life, or drastic change to the environment. Disasters fall into two major categories. These include man made and natural All Essay.

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Types of disasters Natural disaster Man made disaster Natural disaster A natural disaster is a consequence when a natural hazard affects humans and/or the built environment. Eg: earthquake, flood, landslides, volcanic eruptions, floods and cyclones are all natural hazards that kill thousands of people and destroy billions of dollars of habitat and property each year.

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Man Made Disasters. Essay on “MAN-MADE CALAMITIES V/S NATURAL CALAMITIES” People of the world have always faced both types of disasters, natural as well as man-made. Man-made disasters were not prevalent in ancient times. Man-made disasters are the . Nov 25,  · free encyclopedia Anthropogenic hazards or human-made hazards can result in the form of a human-made disaster. In this case, anthropogenic means threats having an element of human intent, negligence, or error; or involving a failure of a human- made system.

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Disaster Ruins from the San Francisco earthquake, remembered as one of the worst natural disasters in United States history A disaster is a natural or man-made (or Words 3 Pages. Disaster is a very common occurrence to the human society. Though its form may be diverse, it has been a challenge for society across castes, creeds, communities and countries. Disasters mainly divided into two most important categories. These include manmade and natural disasters.