India - Natural Disasters — Important Questions

Soil erosion and steep slope formation

Soil erosion and steep slope formation cause landslides in mountainous areas. Step 1: Continuous water flow erodes soil from mountain slopes, making them unstable. Step 2: Construction of roads, railways, and canals creates artificial steep slopes. Step 3: Loose soil accumulation on clay layers increases slope instability. Step 4: When the slope becomes too steep or unstable, gravity pulls the soil and rocks downward, creating landslides. Ocean waves cause coastal erosion, not mountain landslides. Air pollution and lightning strikes do not directly cause land mass movement.

West coast of Kerala, Karnataka, and Goa

The west coast of Kerala, Karnataka, and Goa experiences the most severe coastal erosion. Step 1: During southwest monsoon, the Arabian Sea generates very high waves and strong tides. Step 2: These powerful waves continuously hit the western coastline with great force. Step 3: The west coast faces direct impact from monsoon winds and waves, making erosion more intense. Step 4: The combination of high tides and strong waves during monsoon season erodes large amounts of coastal land. The east coast experiences less severe erosion as it faces the calmer Bay of Bengal, and Gujarat's coast has diff

Growing mangrove forests

Growing mangrove forests is the most effective method to prevent coastal erosion. Step 1: Mangrove trees have strong root systems that bind the coastal soil together. Step 2: These roots act as natural barriers that absorb wave energy and reduce wave impact. Step 3: Mangroves can withstand saltwater and grow well in coastal environments. Step 4: They provide a sustainable, natural solution that also supports marine ecosystems. Concrete walls are temporary and expensive solutions. Sand mining actually increases erosion by removing protective sand layers, and industrial development typically wor

Pressure in Earth's interior and magma movement

Earthquakes are caused by pressure in Earth's interior and magma movement. Step 1: Pressure builds up inside the Earth due to tectonic plate movements and internal heat. Step 2: Movement of magma from one location to another creates stress in rock layers. Step 3: When this pressure exceeds the strength of rocks, they break or shift suddenly. Step 4: This sudden movement or vibration of Earth's upper layers creates earthquakes. Ocean tides, atmospheric pressure changes, and solar radiation do not generate the internal forces needed to cause earthquakes.