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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Amber Richhariya posted an Question
July 21, 2020 • 05:50 am
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30 points
30 points
- IIT JAM
- Geology (GG)
At which location would the water be moving clay, silt, sand and pebbles, but not cobbles or boulders ? -w 400 cm/sec stream x 100 cm/sec y 20 cm/sec lake z2 cm
At which location would the water be moving clay, silt, sand and pebbles, but not cobbles or boulders ? -W 400 cm/sec Stream X 100 cm/sec Y 20 cm/sec Lake Z2 cm/sec 5 m- Graph showing particle diameter and stream speed 100.0 Boulders --25.6 Cim Cobbles 64Cm 10.0 1.0 Pebbles - 0.20 Particle diameter (cm) 0.1 Sand 0.01 0.006 am 0.001 Silt 0.0004 cT 0.0001 Clay 0.00001- 10 200 300 400 500 600 700 B00 Stream speed (cm/sec) (A) (C) W (B)X Z Y (D)
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Sajan sarthak
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At location X the velocity is given as 100cm/sec . The below graph showing at 100 cm/sec velocity the water can move particle size above sand and in between cobble. and pebble and it's not crossing cobble line so it can't move the cobble size particles at this VELOCITY but can move sand ,silt ,clay ,and pebbles. And other conditions does not satisfy so the answer will be at location X. Reference diagram below
![cropped7712458329193894036.jpg]()
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what are the necessary conditions for moving cobbles or boulders?
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from the graph the velocity must be higher than 200cm/sec.
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Greater than 200 cm/sec indicates the fluvial channel environment from the above figure.
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I hope it's the best answer and explained to you properly thank you
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Rahul kumar
Ans: (B) At location X, the stream speed is 100cm/s, sufficient to move clay, silt and pebbles. At 100cm/s cobbles and boulders wouldn't move because the stream speed should be greater than 200 cm/s in order to move cobbles and boulders (values are given in the lower diagram)