Question

Name the feature depicted by
a) Blue line in Balaram nadi
b) Brown patch in 9678

Answer 1

Hint:
a) It is a watercourse, or portion, part, or emerging body of water that continually delivers groundwater in the absence of intermittent, prolonged, or severe drought.
b) It is a mountain, hill or ridge of sand that lies behind the tide-affected portion of the beach.

Complete answer:
a) Blue line in Balaram nadi: A perennial water channel in a seasonal river is the blue line at Balaram nadi.
Perennial water channel -
-A perennial stream or perennial river is a stream or river (channel) that has a continuous stream throughout years of regular rainfall throughout the year across parts of its stream bed.
-For example, the calculation will not be influenced by artificial stream disturbance, flow variability or stream selection associated with operation in hydropower plants.
-For the wetlands, reservoirs, and ponds which occur during the time, perennial streams do not consist of stagnant water.
-Seasonal rivers or lakes should be considered for all other streams, or parts thereof. Via many iterations, the stream will cycle from broken to perpetual, to intermittent via its mechanism.

b) Brown patch in 9678: Sand dunes are marked by Brown patch in 9678.
Sand dunes -
-Dry hot deserts are good sites for the formation of sand dunes.
-When the wind deposits sand on top of each other, sand dunes are formed before a small mound begins to develop.
-Sand piles up more and more on the windward side after the first mound forms, until the edge of the dune collapses under its own weight.
-There are varieties of sand dune shapes such as Barchans, Seifs etc. according to the form of a sand dune.
-As Barchans, the crescent-shaped dunes are referred to and are the most prominent.
-Seif is comparable to Barchans, but only has one wing or stage.

Note:
- We can further divide the alluvial plains into the Khadar and the Bhangar.
-The Khadar-rich flood plains are locally known as 'Betlands' or 'Bets' in Punjab.
-There are large flood plains of Khadar flanked by bluffs, locally known as Dhayas, the rivers in the Punjab-Haryana plains. These bluffs are up to 3 metres high.