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With reference to the glacial lake outburst floods (GLOFs), consider the following statements:
1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.
2. Unlike earthen dams, the moraine dam's weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.
1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.
2. Unlike earthen dams, the moraine dam's weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
With reference to the glacial lake outburst floods (GLOFs), consider t...
A glacier break is suspected to have caused the flash floods in Uttarakhand’s Chamoli.
- When glaciers melt, the water in glacial lakes accumulates behind loose, natural “glacial/moraine dams” made of ice, sand, pebbles and ice residue.
- A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.
- Unlike earthen dams, the weak structure of the moraine dam leads to the abrupt failure of the dam on top of the glacial lake, which holds a large volume of water.
- A failure of the dam has the potential of releasing millions of cubic metres of water in a short period, causing catastrophic flooding downstream.
Reasons
- Glacial retreat due to climate change occurring in most parts of the Hindu Kush Himalaya has given rise to the formation of numerous new glacial lakes, which are the major cause of GLOFs.
- An “Inventory and Monitoring of Glacial Lakes / Water Bodies in the Himalayan Region of Indian River Basins” found that there are 352, 283 and 1,393 glacial lakes and water bodies in the Indus, Ganga and Brahmaputra basins respectively.
Recommendation
- NDMA has recommended the use of Synthetic-Aperture Radar imagery to automatically detect changes in water bodies, including new lake formations, during the monsoon months.
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With reference to the glacial lake outburst floods (GLOFs), consider t...
Glacial Lake Outburst Floods (GLOFs)
GLOFs are a significant natural hazard that occurs when water dams formed by glaciers or moraines suddenly release a large volume of water. These floods can cause devastating and rapid downstream flooding, leading to loss of life, property damage, and environmental destruction.
Statement 1: A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.
Explanation:
- Glacial lakes are formed when a glacier retreats and melts, leaving behind a depression that fills with water.
- These lakes are often dammed by glaciers or moraines, which are piles of debris and sediment deposited by glaciers.
- When the water pressure behind the dam exceeds the strength of the dam, it can lead to a sudden release of water, resulting in a GLOF.
- The released water flows downstream, causing flooding and potential destruction in its path.
Statement 2: Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.
Explanation:
- Moraine dams are composed of loose, unconsolidated sediment, which makes them inherently weaker compared to engineered earthen dams.
- The weak structure of moraine dams increases the risk of their abrupt failure, especially when they are unable to withstand the pressure of the water stored in the glacial lake.
- The large volume of water held by glacial lakes can exert significant pressure on the dam, and if the dam fails, it can result in a catastrophic GLOF.
Conclusion:
Both statements are correct. GLOFs occur when the water dammed by a glacier or moraine is released suddenly, and the weak structure of moraine dams can lead to the abrupt failure of the dam, resulting in the release of a large volume of water. These floods pose a significant risk to communities living downstream from glacial lakes and require careful monitoring and mitigation strategies to minimize their impact.
GLOFs are a significant natural hazard that occurs when water dams formed by glaciers or moraines suddenly release a large volume of water. These floods can cause devastating and rapid downstream flooding, leading to loss of life, property damage, and environmental destruction.
Statement 1: A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.
Explanation:
- Glacial lakes are formed when a glacier retreats and melts, leaving behind a depression that fills with water.
- These lakes are often dammed by glaciers or moraines, which are piles of debris and sediment deposited by glaciers.
- When the water pressure behind the dam exceeds the strength of the dam, it can lead to a sudden release of water, resulting in a GLOF.
- The released water flows downstream, causing flooding and potential destruction in its path.
Statement 2: Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.
Explanation:
- Moraine dams are composed of loose, unconsolidated sediment, which makes them inherently weaker compared to engineered earthen dams.
- The weak structure of moraine dams increases the risk of their abrupt failure, especially when they are unable to withstand the pressure of the water stored in the glacial lake.
- The large volume of water held by glacial lakes can exert significant pressure on the dam, and if the dam fails, it can result in a catastrophic GLOF.
Conclusion:
Both statements are correct. GLOFs occur when the water dammed by a glacier or moraine is released suddenly, and the weak structure of moraine dams can lead to the abrupt failure of the dam, resulting in the release of a large volume of water. These floods pose a significant risk to communities living downstream from glacial lakes and require careful monitoring and mitigation strategies to minimize their impact.
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With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? for Current Affairs 2025 is part of Current Affairs preparation. The Question and answers have been prepared according to the Current Affairs exam syllabus. Information about With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Current Affairs 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?.
With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? for Current Affairs 2025 is part of Current Affairs preparation. The Question and answers have been prepared according to the Current Affairs exam syllabus. Information about With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Current Affairs 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?.
Solutions for With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Current Affairs.
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ample number of questions to practice With reference to the glacial lake outburst floods (GLOFs), consider the following statements:1. A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine is released suddenly.2. Unlike earthen dams, the moraine dams weak structure leads to the abrupt failure of the dam on top of the glacial lake, which holds large volume of water.Which of the statements given above is/are correct? a)1 only b)2 only c)Both 1 and 2 d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Current Affairs tests.
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