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UPSC Exam  >  UPSC Questions  >   Consider the following statements: Obseque... Start Learning for Free
Consider the following statements:
Obsequent streams flow in a direction opposite to that of the original consequent
slope.
Resequent rivers are those that flow in the same direction as the consequent stream but at a lower level.
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?
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Most Upvoted Answer
Consider the following statements: Obsequent streams flow in a dir...
Option (c) is the correct answer.
Under classification of streams:
Statement 1 is correct. Obsequent streams flow in a direction opposite to that of the original consequent slope.
A consequent river is one whose course is determined by the original course of the land.
Statement 2 is correct. Resequent rivers are those that flow in the same direction as the consequent stream but at a lower level.
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Community Answer
Consider the following statements: Obsequent streams flow in a dir...
The correct answer is option C, which states that both statements 1 and 2 are correct.

1. Obsequent streams flow in a direction opposite to that of the original consequent slope:
- Obsequent streams refer to the tributaries that flow in a direction opposite to that of the main river or the consequent stream. These streams form when the main river cuts across a ridge or a mountain and the tributary streams flow away from the main river.
- This phenomenon occurs due to the difference in the geological structure of the area. When the main river erodes through a ridge, it creates a deep valley or a gorge. The tributary streams that develop on either side of the ridge flow in the opposite direction, away from the main river.
- Obsequent streams are commonly found in regions with complex geological features, such as mountainous areas or areas with folded or faulted rock formations.

2. Resequent rivers are those that flow in the same direction as the consequent stream but at a lower level:
- Resequent rivers are formed when the tributary stream joins the main river at a lower elevation, but still flows in the same direction as the main river or the consequent stream.
- This occurs when the tributary stream develops on a relatively lower slope or a lower order stream, and it eventually merges with the main river. However, the tributary stream maintains its direction of flow parallel to the main river.
- Resequent rivers are commonly found in areas with a gentle slope or in regions where the main river has already established its course.

In summary, obsequent streams flow in the opposite direction to the main river or consequent stream, while resequent rivers flow in the same direction but at a lower level. Both phenomena occur due to the geological characteristics of the area and are observed in different types of landscapes.
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Passage-1 ‘Desertification’ is a term used to explain a process of decline in the biological productivity of an ecosystem, leading to total loss of productivity. While this phenomenon is often linked to the arid, semi-arid and sub-humid ecosystems, even in the humid tropics, the impact could be most dramatic. Impoverishment of human-impacted terrestrial ecosystems may exhibit itself in a variety of ways : accelerated erosion as in the mountain regions of the country, salinization of land as in the semi-arid and arid ‘green revolution’ areas of the country, e.g., Haryana and western Uttar Pradesh, and site quality decline—a common phenomenon due to general decline in tree cover and monotonous monoculture of rice/wheat across the Indian plains. A major consequence of deforestation is that it relates to adverse alterations in the hydrology and related soil and nutrient losses. The consequences of deforestation invariably arise out of site degradation through erosive losses. Tropical Asia, Africa and South America have the highest levels of erosion. The already high rates for the tropics are increasing at an alarming rate (e.g., through the major river systems— Ganga and Brahmaputra, in thecontext), due to deforestation and land management practices subsequent to forest clearing. In the mountain context, the declining moisture retention of the mountain soils, drying up of the ‘underground springs and smaller rivers in the Himalayan could be attributed to drastic changes the forest cover. An indirect consequence is drastic alteration in the uplandlowland interaction, mediated through water. The current concern the tea planter of Assam has is about the damage to tea plantations due to frequent inundation along the flood-plains of Brahmaputra, and the damage to tea plantation and the consequent loss in tea productivity is due to rising level of the river bottom because of siltation and the changing course of the river system. The ultimate consequences of site desertification are soil degradation, alteration in available water’ and its quality, and the consequent decline in food, fodder and fuelwood yields essential for the economic wellbeing of rural communities.=>According to the passage, which of the following are the consequences of decline in forest cover?1. Loss of topsoil2. Loss of smaller rivers3. Adverse effect on production4. Declining of groundwater.Q. Select the correct answer using the code given below.

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Consider the following statements: Obsequent streams flow in a direction opposite to that of the original consequent slope. Resequent rivers are those that flow in the same direction as the consequent stream but at a lower level. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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