Those disasters, which are mainly caused by nature, are called the natural disaster. They are geographical and meteorological. Deforestation, landslides, flood, volcano etc. are some examples of natural disaster.
The overflow of water in rivers, oceans etc. that enters into human settlement and causes great harm is called flood. Rain is not only the cause of the flood. But in the context of Nepal, rain is regarded as the main agent that causes the flood.
Some major preventive measures of flood are as follows:
The sliding down of a piece of land under the force of the gravitational pull of a mountain or hillside is called the landslide. Landslide is a natural process in which rocks debris or parts of land move downwards under the force of gravity.
Some major methods of preventing landslide are as follows:
Those disasters which are mainly caused by nature are called natural disasters. E.g.: flood, landslide, cyclone etc.
Any four effects of natural disasters are given below:
i) Loss of human beings and properties.
ii) Loss of agricultural land and its fertility.
iii) Loss of plants and animals.
When the dry land is filled with water overflowing from the rivers or lakes or oceans, it is called flood.
Any four causes of flood are:
i) Heavy rainfall
ii) Increasing Urbanization
iii) Outbrusting of a glacial lake.
iv) Outbrusting of lake formed by landslide
v) Destruction of dam
The effects of flood are given below:
a) The flood causes loss of lives of human beings, animals and land as well.
b) It deposits the sediments in its way. It may change the structure of the land.
c) It causes pollution in the sources of water and rivers.
d) It causes epidemic diseases due to rotten dead bodies.
The methods of controlling flood are listed below:
a) Watershed management.
b) Use of engineering technology to control the flow of water in the rivers.
c) Preparation of Flood hazard Map Depending on the geological structure.
Any three measures of flood are given below:
a) It should not be allowed to make houses and other physical infrastructure near the bank of rivers and streams.
b) The people affected from blood should be displaced towards a safer place in time.
c) The people living on the bank of rivers should be informed about the upcoming disaster in time if possible.
d) The flood affected people should be provided with the necessary things like residence, food, clothes etc.
Public awareness can play the vital role in controlling flood. If public are made aware of the flood, they will try to protect themselves from the flood. For this, they will apply different methods. Such as afforestation, terrace cultivation etc. This will help in preventing from theflood.
'Public awareness' is the single preventive measure for both flood and landslide. Erosion, Flood and landslide disturb the position of rocks. Such disturbances create a vibration of the earth and we experience an earthquake.
Himalayan ranges are considered as an active earthquake area. Nepal is situated in this region. So, the earthquake is frequent in Nepal.
Landslide is a natural process in which rocks debris or parts of land move downwards under the force of gravity.
The sliding down a piece of land under the force of gravitational pull on a mountain or hillside is called landslide. It may be Soilslide or rockslide.
Any four causes of landslide are:
a) Heavy rain
c) River cutting
e) Unscientific agriculture system
f) Use of inappropriate technology in the physical infrastructure etc.
Any four effects of landslide on environment are given below:
i) When the landslide blocks the flow of water in rivers or streams, it may cause flood and pollutes the water resources.
ii) It destroys development structures like roads, communication network, bridges etc.
iii) It reduces forest and leads to deforestation and reduction of wildlife.
iv) It sweeps the agricultural land and sometimes becomes responsible for the death of people and domestic animals.
The ways to check landslide in our village are listed below:
i) Afforestation should be promoted and intensive grazing by domestic animals should be avoided.
ii) Construction of roads and dams should be restricted in fragile areas.
iii) Terrace farming with ditches on hills slows down the rate of landslide.
The preventive measures of landslide are:
The sliding down of a piece of land under force of gravitational pull on a mountain or hillside is called ______.
The provinces with the greatest number of disastrous landslides are ______.
Quebec and Ontario
Newfoundland and Alberta
Alberta and British Columbia
British Columbia and Quebec
Damage to buildings during landslides can be caused by ______.
flooding upstream of a landslide dam
collapse of ground under the building
all options are correct
collision from heavy debris
Land slide is active in ______.
terrace farmed hill
The overflow of water in rivers, oceans etc. that enters in human settlement and causes great harm is called ______.