GEOLOGY
GEOMORPHOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the relationship between stream velocity and ability of river processes on particular sized particles
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Shows how over time a river changes
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Shows the amount of work a river does
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Shows how much time the load takes to be transported to the mouth of a river.
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Detailed explanation-1: -Hjulström curve describes the relationships between erosion, transportation, and deposition of sediments. Based on this logarithmic plot, it is possible to determine whether a river will erode, transport, or deposit the sediment depending on the particle size and water velocity.
Detailed explanation-2: -The bigger the load particle, the greater the velocity needed to keep it moving. That’s why large particles (like boulders) are deposited first and small, fine particles (like silt) are deposited last.
Detailed explanation-3: -Critical erosion velocity (Vmc) was operationally defined as the mean cross-sectional velocity (Q/AX) causing sufficient particle motion such that the bed packing arrangement failed and the bed became mobile. The result of each run was plotted.
Detailed explanation-4: -As the particle size gets larger, the minimum flow velocity needed to erode the particle decreases, with the lowest flow velocity being 30 centimetres per second to erode a 0.5 millimetre particle. To erode particles larger than 0.5 millimetres, the minimum flow velocity rises again.