<p>Under normal conditions a layer of gravel has more hydraulic conductivity in comparison to sand. Check this <a href="http://structx.com/Soil_Properties_007.html" rel="nofollow noreferrer">table with a hydraulic conductivity k per soiltype</a> </p>

<p>The storage in the aquifer with gravel will be larger than in sand if the same thickness is used. Otherwise you should take the thickness into account as well (= Transmissivity: kD).</p>

CC BY-SA 4.0
2018-10-01T13:28:46.573Z
2018-10-03T18:49:40.800Z
2018-10-03T18:49:40.800Z
3TW3
<p>I have a confined aquifer of sand. I will temporarily drain the aquifer, remove the top one meter of the aquifer and then replace that with a layer of gravel. After that I will restore the layer (and the aquitard above it). After that, it is a confined layer again. </p>

<p>Is the storage of the aquifer different with the small layer of gravel? </p>

CC BY-SA 4.0
2018-09-18T07:08:33.717Z
It all depends on the pore space in each unit volume of sand or gravel.
Wolfgang Bangerth
<hydrology><groundwater>
Does the configuration of a confined layer change the storage?
Ashoka
# Does the configuration of a confined layer change the storage?

(Asked by: username_0 on 2018-09-17)

I have a confined aquifer of sand. I will temporarily drain the aquifer, remove the top one meter of the aquifer and then replace that with a layer of gravel. After that I will restore the layer (and the aquitard above it). After that, it is a confined layer again.

Is the storage of the aquifer different with the small layer of gravel?

**Tags:** hydrology, groundwater

> **Comments:**
> **username_1**: It all depends on the pore space in each unit volume of sand or gravel.  

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## 1 answers

### Answer by username_2 on 2018-10-01. Score: 1

Under normal conditions a layer of gravel has more hydraulic conductivity in comparison to sand. Check this [table with a hydraulic conductivity k per soiltype](http://structx.com/Soil_Properties_007.html)

The storage in the aquifer with gravel will be larger than in sand if the same thickness is used. Otherwise you should take the thickness into account as well (= Transmissivity: kD).


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