Hahahha where In Somalia aboowe? Inshallah after i get my bachelors in Geology I can help with oil in rock and hit jackpot

Lava Al-Rasheed Agha - Thank you!

The monitoring wells will be installed in the permeable layers, not the clays or impermeable layers. So when you see that "funnel" or "cone", it is representing the head in the permeable layers, not the head in the clay or impermeable layers. So when you see the cone spreading through the clay layers, that just means the head in the permeable layers rises to an elevation that is the same as the impermeable layers - it does not represent head in the impermeable layers. Hope that makes sense!

@@daneandersen8181 Thanks for your reply! however, it is still unclear what a sinkhole will actually look like when pumping water from an aquifer enclosed between two impermeable layers (eg, clay). If the static water level in the well is set above the roof of the watertight layer (in the pressure well), then the water level will decrease during water intake (the static level will drop to the dynamic water level). In this case, the depression funnel, it seems to me, should not go beyond the aquifer, enclosed between the layers of clay. Or is it not so?

Possibly, how far apart are the well and the hill?

Yes, you can remove the well cap and use a water level tape. Usually the well will have a smaller pipe to insert the water level tape to take a measurement, that way you don't get the tape wrapped around the pump column or cables. The water level tapes are quite expensive, but you can rent them from environmental supply shops. You don't need a professional to do this, just the right equipment and decontamination procedures. Don't go sticking a contaminated tape into your well!

good job my question is can we recharge unconfined aquifer with Rooftop water in rainfall season directly through injecting method of PVC pipe upto 200 ft

Luis Castro glad to help!

Nope! the water level in your piezometer will be the same as the water table in the unconfined aquifer

Sure!

A piezometer is basically an observation well. Piezometers are just small diameter wells that are mainly used for measuring water levels (the small diameter makes it cheaper to install, but you sacrifice the ability to insert a large pump into it). The main point is that during an aquifer test, you measure water levels in the well you are pumping, and any surrounding wells (which in that sense are observation wells, and could be a regular well or piezometer)

Yes, they will just be located at different depths.

@@daneandersen8181 if i dig hole up to confined aquifers and put pipe let say 60meters deep, isnt hard to pump out water using manual piston water pump?

No, not necessarily. You could have confined conditions in a shallow aquifer, and unconfined conditions in a deeper aquifer. What really makes the difference is if the water in that aquifer is under pressure because a low permeability rock unit (e.g. clay or shale) is overlying the aquifer

@@daneandersen8181 Knowledge is held, you don't know until you ask... Appreciate it, m8

Tejas Patil a perched aquifer is a relatively small aquifer above a larger regional aquifer.

That's a new one but I'll take it as a compliment!