Question

What is the extent of Northern Plains of India? (1 MARK)
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Answer 1

Answer:

The northern plains are the largest alluvial tract of the world. These plains extend approximately 3200 km from west to east. The average width of these plains varies between 150 and 300 km. In general, the width of the northern plains increases from east to west (90-100km in Assam to about 500km in Punjab)

Answer 2

• The northern plains are the largest alluvial tract of the world. These plains extend approximately 3200 km from west to east.
• The average width of these plains varies between 150 and 300 km. In general, the width of the northern plains increases from east to west (90-100km in Assam to about 500km in Punjab).
• The exact depth of alluvium has not yet been fully determined. According to recent estimates, the average depth of alluvium in the southern side of the plain varies between 1300-1400m, while towards the Shiwaliks, the depth of alluvium increases. The maximum depth of over 8000m has been reached in parts of Haryana.
• The extreme horizontality of this monotonous plain is its chief characteristic (200m – 291m). The highest elevation of 291 m above mean sea level near Ambala forms a watershed between Indus system and Ganga system).
• The monotony of the physical landscape is broken at the micro level by the river bluffs, levees etc.
• [Floodplain – That part of a river valley, adjacent to the channel, over which a river flows in times of a flood.
• Levee – An elevated bank flanking the channel of the river and standing above the level of the flood plain.
• Bluff – A river cut cliff or steep slope on the outside of a meander. A line of bluffs often marks the edge of a former floodplain.]