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World Report View

The Wonderful World of Ground Water!

by Rosa Domingos | 10-02-2018 00:25 recommendations 0

We all can familiarise with surface water bodies (such as: rivers, dams, marshes, swamps, the ocean etc) but one source of water that has been poorly understood and often undervalued is groundwater.


As stated above, groundwater is water that is located below the earth?s surface. Groundwater can be found almost everywhere, beneath the hills, plains and even deserts! It is found in vast quantities but it is not always accessible. After a rainfall event or snowmelt, water migrates through the ground and is stored in porous soils, sand, gravel or rocks (for instance, sandstone, limestones and fractured rock like dolerite) called aquifers. When an aquifer is replenished by surface water, it is called recharge.

Water moves through these materials because of various reasons, such as interconnected pore spaces, depth to the aquifer etc. The speed at which groundwater flows is dependent of the pore space and how well the grains are arranged.

The water table (figure 1) can be situated deep or shallow from the earth?s surface. It may rise or fall due to various factors such as: heavy precipitation or thawing of snow, excessive extraction or drought.

Groundwater is brought up to the surface naturally through springs. Groundwater can also flow back to the surface by discharging back into the lake or streams. Water can also be pumped out through boreholes, but caution must be taken when pumping. One should make sure that over extraction is prohibited so as to not lower the water table below the well and dewater the aquifer.


In some parts of the world, societies are face with various water shortages because groundwater is being utilised at a rate that cannot be equally (if not more) replenished. In other cases, permeable soils connecting the surface to aquifers are seen as the primary culprits for groundwater contamination due to anthropogenic activities ( such as landfills, leaky underground storage tanks, and overuse of pesticides and fertilisers).


Groundwater spells itselfs a bright future, a hidden resource that is difficult to conceptualise but with more research and development that is put to its regard, who knows the possibilities it may hold in the future!

  
Resources

1. National Centre for Groundwater Research and Training
http://www.groundwater.com.au/what-is-groundwater

2. Groundwater Foundation
http://www.groundwater.org/get-informed/basics/whatis.html

3.The USGS
https://pubs.usgs.gov/gip/gw/gw_b.html

An example of a potential aquifer (Aliwal North Field Trip, 2017) Aquifers alternate their storgare capacity by serving as a buffer. During floods, they store large quantities of water. During drought, they replenish streams with the stored water (Aliwal Field Trip, 2017). Various materials can be deemed as aquifers, weather they are porous or fractured (groundwater.org/get-information).

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  • Dormant user Rosa Domingos
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3 Comments

  • Horticulturist Susmita says :
    Greetings rosa
    I hope you are doing well

    Thank you so much for this report
    Keep writing

    Green cheers
    Regards
    Sus
    Posted 15-03-2020 16:30

  • Rosa Domingos says :
    It is my pleasure! Hopefully, more members will read and share their insight on this resource.
    Posted 14-02-2018 20:56

Eco Generation

  • Eco Generation says :
    Nicely written information.Thanks for sharing.
    Posted 14-02-2018 10:17

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