All questions of Natural Hazards in India for UPSC CSE Exam

The Main Objective of the National Cyclone Risk Mitigation Project in India is to Mitigate the Effects of Cyclones.

- Protecting marine life: While protecting marine life might be a positive outcome of the project, the primary objective is to mitigate the impacts of cyclones on human lives and infrastructure.
- Enhancing coastal tourism: Although improving coastal tourism can be a side benefit, the project focuses on reducing the vulnerability of coastal communities to cyclones.
- Mitigating the effects of cyclones: The primary goal of the National Cyclone Risk Mitigation Project is to minimize the damage caused by cyclones through various measures such as early warning systems, construction of cyclone shelters, and community awareness programs.
- Promoting agriculture in cyclone-prone areas: While promoting agriculture in these areas could be a long-term goal, the immediate priority is to protect lives, livelihoods, and infrastructure from the devastating impact of cyclones.

Therefore, the main objective of the National Cyclone Risk Mitigation Project in India is to mitigate the effects of cyclones by implementing measures to enhance preparedness, response, and resilience in cyclone-prone areas.

The agency responsible for issuing early warnings for cyclones and tsunamis in India is the Indian National Centre for Ocean Information Services (INCOIS).

Understanding Landslides
Landslides are geological phenomena that involve the movement of rock, earth, or debris down a slope. They can occur due to various factors such as rainfall, earthquakes, volcanic activity, and human activities. The main types of landslides include:
Types of Landslides
- Falls: These involve the rapid descent of rock or debris from a steep slope or cliff. The material detaches from the slope and falls freely under the influence of gravity.
- Topples: Toppling occurs when a mass of material tilts and falls forward over the edge of a slope. This movement is often due to the loss of support at the base of the slope.
- Spreads: Spreading is characterized by the horizontal movement of soil or rock layers, often caused by liquefaction or subsidence. This type of landslide typically occurs in soft, saturated materials.
Why Eruptions are NOT Landslides
- Eruptions: Eruptions refer specifically to volcanic activity where magma, gases, and ash are expelled from a volcano. This process is distinct from landslides, as it involves the release of material from beneath the Earth's surface rather than the gravitational movement of materials down a slope.
- Eruptions can lead to secondary effects like pyroclastic flows, which may resemble landslides, but they are fundamentally different processes.
In summary, while falls, topples, and spreads are recognized types of landslides, eruptions are a separate geological phenomenon related to volcanic activity and do not fall under the category of landslides.

The text states that natural hazards can be grouped into two major categories: geological hazards and weather-associated hazards. Epidemics, which are outbreaks of infectious diseases, are not classified as geological hazards.

Forest Survey of India's Forest Fire Alert System
Forest Survey of India (FSI) has developed a Forest Fire Alert System to monitor forest fires in real-time by utilizing satellite information from NASA and ISRO.

How does it work?
- The system uses satellite data to detect active fire locations and intensity.
- It provides alerts to forest departments and other stakeholders to take immediate action in case of a forest fire.
- The alerts are sent through SMS, emails, and online dashboards, ensuring timely response to forest fires.

Benefits of the system
- The system helps in early detection of forest fires, minimizing damage to forests and wildlife.
- It enables quick mobilization of resources to control and extinguish fires.
- By providing real-time information, it helps in effective planning and management of forest fires.

Collaboration with NASA and ISRO
- FSI collaborates with NASA and ISRO to access satellite data for monitoring forest fires.
- The integration of data from these space agencies enhances the accuracy and efficiency of the Forest Fire Alert System.
- This collaboration highlights the use of cutting-edge technology for forest fire management and prevention.
In conclusion, the Forest Survey of India's Forest Fire Alert System plays a crucial role in monitoring forest fires in real-time using satellite information from NASA and ISRO. It helps in early detection, quick response, and effective management of forest fires, thus contributing to the conservation of forests and biodiversity.

Batholiths are large dome-shaped intrusive bodies of igneous rock that form deep within the Earth's crust. They are composed of a variety of rock types, including granite, granodiorite, and diorite. Batholiths are characterized by their massive size, often covering hundreds of square kilometers.

Formation of Batholiths:

1. Intrusion: Batholiths are formed when large volumes of magma are injected into the Earth's crust. This magma is generated through the melting of pre-existing rocks in the lower crust and upper mantle.

2. Cooling and Solidification: Once the magma is injected into the crust, it begins to cool and solidify over a long period of time. The cooling process is slow due to the large size of batholiths and the insulating properties of surrounding rocks.

Characteristics of Batholiths:

1. Dome-shaped: Batholiths typically have a rounded or dome-shaped appearance due to the slow cooling and solidification process. The magma intrudes into the crust and forms a large, bulging mass of rock.

2. Intrusive: Batholiths are intrusive igneous features, meaning that they form within the Earth's crust rather than on the surface. This is in contrast to extrusive igneous features, such as volcanoes, which form when magma erupts onto the surface.

3. Composition: Batholiths are primarily composed of coarse-grained rocks, such as granite, which contain large crystals that formed as the magma slowly cooled. The composition of batholiths can vary depending on the source of the magma and the surrounding rocks.

4. Size: Batholiths are some of the largest intrusive features on Earth, often spanning hundreds of square kilometers. They are typically much larger than other intrusive features, such as dikes or sills.

Importance of Batholiths:

1. Economic Significance: Batholiths often contain valuable mineral deposits, such as gold, copper, and molybdenum. These minerals can be extracted through mining, providing important economic resources.

2. Landforms: Batholiths can influence the landscape by uplifting and exposing the overlying rocks. They can create mountain ranges, ridges, and other prominent landforms.

In conclusion, batholiths are large dome-shaped intrusive bodies of igneous rock that form deep within the Earth's crust. They are characterized by their massive size, dome-shaped appearance, and coarse-grained composition. Batholiths play a significant role in shaping the Earth's surface and can contain valuable mineral resources.

Tsunamis are primarily caused by earthquakes. These earthquakes occur under the ocean and result in the sudden displacement of the seafloor. This vertical movement of the seafloor generates a series of extremely long waves, known as tsunamis.

The text states that weather-associated hazards include cyclones, thunderstorms, droughts, floods, and epidemics. Cyclones are specifically mentioned as an example of a weather-associated hazard.

The text describes shield volcanoes as having low slopes and consisting almost entirely of highly fluid lava. Therefore, shield volcanoes are known for their low slopes and the flow of highly fluid lava.

The primary cause of forest fires during March and April in India is the presence of dry wood, leaves, grass, and other flammable materials on the forest floor, which can easily ignite with a trigger.

The devastating Cyclone Fani in 2019 affected the state of Odisha in India.

Tsunami early warning services in India are provided by the Indian National Centre for Ocean Information Services (INCOIS).

The primary cause of most tropical cyclones is low atmospheric pressure over warm tropical oceans.

The text states that most of the active volcanoes are found in the Pacific region, which is referred to as the Pacific Ring of Fire. Therefore, the correct answer is the Circum-Pacific Belt.

A surface fire is a forest fire that primarily spreads along the ground as it engulfs the surface litter on the forest floor.

Forest fires can decrease soil quality and fertility by altering the composition of the soil and reducing its moisture content.

The key role of afforestation in flood management is to reduce runoff and increase water absorption, thereby mitigating the impact of floods.

The text explains that a landslide dam is formed when a landslide causes partial or complete blockage of a river channel. This accumulated mass of landslide debris results in a landslide dam.

One of the primary mitigation measures to reduce the impact of floods in India is afforestation in catchment areas. This helps in reducing runoff and increasing the absorption of rainfall.

The text explains that P waves, also known as primary waves, are longitudinal waves that can pass through both solids and liquids. Therefore, P waves are the correct answer.

A firestorm is a type of forest fire that spreads most rapidly and is characterized by intense flames over a large area.

The eastern coast of India is more prone to cyclones than the western coast.

According to the India State of Forest Report 2019, approximately 21.67% of India's geographical area is identified as forest.

Assam is one of the regions in India that is identified as "extremely prone" to forest fires.

Climate change is linked to longer duration, increasing intensity, and higher frequency of forest fires, making them more prone to occur.

The text states that heavy or continuous rainfall can lead to landslides, especially in areas with steep slopes. Snowfall can also contribute to the occurrence of landslides. Therefore, rainfall and snowfall are identified as major causes of landslides.

The text explains that magma is the term used for molten rocks and related materials inside the Earth, while lava is the term used for magma that has reached the Earth's surface. Therefore, magma is liquid rock underground, while lava is liquid rock on the Earth's surface.

The primary purpose of the Tsunami Early Warning System (TEWS) is to provide early warnings for tsunamis, especially in the Indian Ocean region.

Healthy forests act as a sink and reservoir for carbon, playing a crucial role in mitigating climate change by storing and sequestering carbon.

Forest fires in India are primarily caused by deliberate human activities, such as setting dry leaves on fire for collecting mahua flowers, which are used to make a local drink.