A Deranged Drainage Pattern has no clear pattern. It can be found in areas with low relief, low slopes, and large sediment loads. Deranged Drainage Pattern is a subtype of Drainage Pattern which is an important concept in the syllabus of the UPSC examination.

Deranged Drainage Pattern- Concept

• A deranged drainage system is one that exists in drainage basins where the rivers and lakes do not follow a consistent pattern.
• It occurs in regions where there has been a significant geological disturbance. The Canadian Shield is a classic example.
• The topsoil was scraped away during the last ice age, leaving primarily bare rock.
• The melting of the glaciers left terrain with many variations in height and a lot of water to accumulate in the low areas, which explains why Canada has so many lakes.
• The drainage basins are new, and they are still figuring things out.
• The system will eventually settle down.

Significance

• They provide a thorough description of the terrain that may be used to categorize and evaluate it.
• Terrain modeling, visualization, and environmental applications generally employ them.

Conclusion

A river basin's drainage pattern is a significant geographical feature. Above all, drainage patterns for distinct sub-networks corresponding to sub-catchments of the main river catchment zone can be calculated for different orders.

FAQs

Question: What is a deranged drainage pattern?

Question: What causes a deranged drainage pattern?

Question: What are the characteristics of a deranged drainage pattern?

Question: Where can deranged drainage patterns be commonly found?

Question: How does a deranged drainage pattern differ from other drainage patterns?

MCQs

1. What is the primary cause of a deranged drainage pattern?

A) Volcanic activity

B) Tectonic disturbance and glacial activity

C) Simple erosion of rocks

D) Seasonal rainfall

2. Which of the following drainage patterns is characterized by rivers flowing in irregular, chaotic paths?

A) Dendritic

B) Radial

C) Deranged

D) Trellis

3. Deranged drainage patterns are most commonly associated with which geographical feature?

A) Old mountain ranges

B) Glacial regions

C) Desert areas

D) Coastal plains

4. What is the main difference between a dendritic and a deranged drainage pattern?

A) A dendritic pattern has a uniform, tree-like structure, while a deranged pattern is irregular and chaotic.

B) A dendritic pattern is found in mountainous regions, while a deranged pattern is found in flat plains.

C) A dendritic pattern is formed by human activity, while a deranged pattern is formed naturally.

D) A dendritic pattern is found in urban areas, while a deranged pattern is found in rural areas.

5. In which of the following areas would you most likely find a deranged drainage pattern?

A) The Ganges River basin

B) The Alps

C) The Scottish Highlands

D) The Sahara Desert

GS Mains Questions and Model Answer

Q1: Discuss the causes and characteristics of a deranged drainage pattern. How does it differ from other types of drainage patterns?

Answer: Deranged drainage patterns result from geological disturbances such as glacial activity, tectonic movements, or volcanic eruptions. Their characteristics include irregular and chaotic river courses, stagnant water bodies, and haphazard distribution of tributaries. Unlike structured patterns like dendritic (tree-like) or radial (flow from a central point), deranged patterns lack coherence and uniformity.

Q2: How do tectonic and glacial activities contribute to the formation of deranged drainage patterns?

Answer: Tectonic activities like uplift and faulting disrupt river courses, while glacial movements carve new valleys and block existing paths. These processes lead to irregular and chaotic drainage systems, characteristic of deranged patterns. Both factors cause rivers to re-route, creating unpredictable and disorganized flow paths.

Q3: Analyze the role of human activities in altering natural drainage patterns and their impact on the environment.

Answer: Human activities, including urbanization, deforestation, dam construction, and mining, alter natural drainage by disrupting river courses and increasing surface runoff. These changes lead to flooding, soil erosion, and loss of biodiversity, necessitating sustainable practices to mitigate environmental damage.

Previous Year Questions on Deranged Drainage Pattern

1. UPSC CSE 2021

Question: Explain the concept of deranged drainage patterns and discuss the factors responsible for their formation.

Answer: This question requires an explanation of deranged drainage patterns, highlighting their irregular nature and the geological events (e.g., glacial or tectonic activity) that cause their formation.

2. UPSC CSE 2020

Question: Discuss the various types of drainage patterns in geography and explain the formation of a deranged drainage pattern.

Answer: This question involves describing major drainage patterns (dendritic, radial, trellis) and focusing on the formation of deranged drainage patterns, emphasizing their association with glacial and tectonic activities.