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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Sajan sarthak Best Answer
Both X axes and Y axes are in logarithmic scale . And this is a famous Hjulstorm graph . here the upper concave graph is erosional curve. the below line is the depositional curve. If you take the x axes grain size of 0.2 mm just after the 0.1 line then it interct the erosional curve at 20cm/sec. so Answer is 20cm/sec