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Geography - Drainage Video Lecture | NCERT Video Summary: Class 6 to Class 12 (English) - UPSC

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FAQs on Geography - Drainage Video Lecture - NCERT Video Summary: Class 6 to Class 12 (English) - UPSC

1. What is drainage in geography?
Ans. Drainage in geography refers to the network of rivers, streams, and other water bodies that carry surface water and groundwater from higher elevations to lower elevations or to the sea. It plays a crucial role in shaping the landscape and influencing various natural processes.
2. How does drainage impact the geography of a region?
Ans. Drainage has a significant impact on the geography of a region. It determines the pattern of landforms, such as valleys, gorges, and floodplains. It also influences soil fertility and agricultural practices, as well as the availability of water resources for human use and ecological balance.
3. What are the different types of drainage patterns?
Ans. There are several types of drainage patterns, including dendritic, trellis, rectangular, radial, parallel, and annular. Dendritic patterns resemble the branches of a tree, while trellis patterns form a rectangular grid-like network. Rectangular patterns occur in regions with structural control, radial patterns emerge from a central high point, parallel patterns flow parallel to each other, and annular patterns encircle a central highland.
4. How does the drainage system affect the occurrence of floods?
Ans. The drainage system plays a crucial role in the occurrence of floods. If a drainage system is poorly developed or obstructed by human activities, such as urbanization or deforestation, it can lead to reduced water absorption and increased surface runoff. This can result in the accumulation of water and the occurrence of floods during heavy rainfall events.
5. How does river erosion contribute to the formation of landforms?
Ans. River erosion is a key process in the formation of various landforms. As rivers flow, they erode the land through processes like hydraulic action, abrasion, and corrosion. Over time, this erosion can lead to the formation of landforms such as river valleys, waterfalls, meanders, and floodplains. The intensity and pattern of erosion depend on factors such as the volume of water, slope gradient, and the type of rocks and sediments present.
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