Porosity and Permeability

This video briefly introduces the concept of groundwater before explaining how two properties - porosity and permeability - combine to determine the availability of groundwater and the ease with which it travels through rocks and sediment. We show simple bench-top demonstrations to illustrate each property and we calculate what a reasonable porosity value would be for common sediments such as sand and gravel. Finally, we discuss which rocks would best serve as sources of groundwater and which are likely to be barriers to groundwater flow. Visit our blog (geosciencevideos.wordpress.com) for a free quiz about the content in this video.

[@sophiemontecalvo7503]

Incredibly helpful video, thank you very much. Well done.

[@mothermonster13]

Yeah

[@rosalyn6344]

This video is well set up and edited. A big thank you and appreciation to whoever helped make this video. Very helpful.

[@brandonchase2376]

This video is like the best edited video! Nice one professor.

[@GEO-DesktopDemos]

This is an excellently prepared video. I would like to point out however that porosity is inversely proportional to grain size in a well-sorted sediment. I'm curious if in your porosity experiment you were perhaps not achieving full saturation in the sand.

[@khaledbassiony5913]

I need a Geo Science course as I'm a mechanical Engineer but work on a tunnel boring machine. therefore, i need to learn more about soil. Thanks for your effort

[@pranjalsingh9154]

What a nice video! learning it for studying vascular plant growth.

[@mateusmbr1]

Very clear and helpful video! Thanks, and greetings from Curitiba (BRA)

[@geoeye967]

Excellent and valuable demonstration.Thank you.

[@Zhinkk]

Thanks, was really helpful.

[@tunahanvedodolar5992]

it was pretty usefull for my engineering final exam study.

[@hannahjones1037]

Thank you so much! Great videos

[@yashchavan9403]

One of the best vedio!!! Thank you

[@ramadhanzebari9783]

Thanks so much.. Only have one question.. have you ever see negative porosity .. in any mode 🤔

[@anaivanovic4349]

Thank you , that was helpful

[@yess.6558]

AMAZING VIDEO!! Thank you guys so much!

[@ericasamoah7275]

Good demonstration. very useful

[@Ed-TFT]

helpful video, exactly what i needed.

[@johelvenegascastillo2589]

Very good, but how is permeability calculated with this experiment? Which equation allows to obtain data with this experiment?

[@Ho-fy1sy]

Permeability: Gravel(water flow easily) > Sand > Clay (water cannot flow through)

[@kairo9757]

Very helpful!!!
Thank you so much!

[@jessocampo9238]

I know you have videos

[@habeebrahman3725]

Very useful video, thanks a lot

[@endelvelt7650]

thanks, exactly what i needed

[@AshrafAli-888]

It is different... Thank you....

[@amitgoel1891]

Nice demo.

[@joshuaeseigbe3348]

Very helpful video
Thanks

[@muhammadzeeshan1752]

very informative video

[@mariahmartin9432]

Who is here because of science class

[@mohamedsameh8594]

Practical exam*

[@matthewbrightman3398]

No. Just like the music.

[@TheAmpster529]

so like which one is like a sponge im confused

[@utube_u]

very helpful...

[@inupanurthivamsi]

What type of soil porosity is high?

[@qssee16]

is the 'immobile-porosities' means low permeability?

[@dibyendurana7935]

Why porosity of clay material is greater than sand as according to your experiment , it should be reversed???

[@tasbiau.6354]

permeability not porosity so they're right

[@asaadartdos9805]

great job.

[@AdilKhan-zg7jy]

Nice video sir

[@engismail249]

Good lesson

[@abdallahahmed9904]

Thank you

[@santoshpukhrambam1527]

nice video

[@riskayuliana2239]

May i use your video be my duty in my rocks class? Thank You before🙏

[@michaelnuckels3997]

Very cool

[@aberegetachew2573]

thanku thi vedio

[@STRUCENGG]

thanks alot

[@ma.sealtielaudwreydejesus7594]

More please

[@10Alan17]

Does Clay have high or low Porosity? and if so is it's porosity lower or greater than Sands?

[@GeoScienceVideos]

Clay can have higher porosity than sand but its permeability is lower.

[@thehappypeople1762]

thanks

[@arianacao2525]

Porosity = amount of pore space
Permeability = how easily water flows through
Different materials
Igneous rocks have high porosity but low no permeability
Sand and gravel have high porosity and permeability = good groundwater sources
Fractured igneous rocks, limestone, granite high porosity and high permeability = Good groundwater reservoirs

[@thegoat5831]

How many Minecraft villagers have you kidnapped?

[@sajid2031]

Very fine

[@shmackkboy]

no.

[@orlandoalcala5713]

7:00

[@clye7788]

sooo gewdb

[@tan2327]

rock time

[@trinikidd92]

wow those are some huge glasses of rocks!

[@ahmedlouay5369]

Ok

[@tanyagodsey4745]

Where my classmates at???

[@aromalk5265]

Nte ponnu ,enik oru kopum mensilayilla tto🤧

[@darealzinlord]

Anyone else watching this cause of Mr Bunner?😔

[@mohamedmubarak7835]

مين من STEM و جاي يشوف البراكتيكال😂؟

[@alejandraliberio3974]

so no one is here bc their apes teacher assigned this to them ...

[@shmackkboy]

No LMAO

[@fijarrhobbanyamir4970]

Gak bisa basa engelshh

[@Tintan1305]

The Agoge diet is the ultimate meal plan for those looking to build muscle fast.

[@stephenpablo8710]

amature video lame