Constant Head Permeability Test

chapter 47 - Constant Head Permeability Test
The property of the soil which permits the water or any liquid to flow through it through its voids is called permeability. It is the ease with which water can flow through the soils.
Constant head method is suitable for coarse grained soils which are relatively more pervious because of their larger voids.
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Sir your presentation is very good...this kind of presentation will be good for irrigation and hydrology as well....

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Currently making a presentation explaining about the history and theory for coefficient of permeability, this is really helpful!

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Which software used to make this animation ?

[@studypurpose7804]

Thank you. Great explanation.
Is there any method to find air permeability of muck pile of rock fragments?

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[@TheToufikzeidan]

So for a landfill which method would you use to test? Falling or constant head?

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[@israelojo7620]

Can you please explain why the final equation for permeability is in m/s instead of m^2 (darcy)? Thank you so much for your explanation!

[@bjstokes4025]

it there is a permeameter filled with compacted clay, that has an inlet height and an outlet height which would I use? I am thinking falling head since the compacted clay has low permeability and the H varies, but it seems like there is a hydraulic gradient in both tests

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[@n.negash4859]

very nice video! however, correct me if I'm wrong but with this test you effectively measure the vertical hydraulic conductivity correct? And if so, does simply rotating your initial sample by 90 degrees give you the horizontal conductivity?

[@gobindadas953]

Sir, when we fill the space between container and soil sample with impervious concrete, how the water will pass through it upto manometer??

[@aravindg4478]

I HAVE A DOUBT
i this video you calculated length L in verticle direction bcoz of vertcile flow but in previous video you calculated in horizontal direction both are fine but if water flows in 60degree to horizontal plane how to calculate the L length between two ponits, hortizontally or vetically?

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Sir please add caption. It will helps to hearing impairment students.

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Sir ,i think k=(VL)/(T*A*delta H) . Becuse discharge is equals to volume by time taken ....

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Why bottom(second manometer) water level is not at the same level as top manometer? My Intuition says it will be at the same level please correct me

[@karangupta725]

I think the difference comes due to obstruction water faces in its path. But if we look at a pipe filled with only water, the head will be the same, if we ignore the gravitational effect(or the height difference is less).

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