from The Open University
Alternatively you can skip the navigation by pressing 'Enter'.
The Bottom Line: Winter 2015-16: Customer ServiceSaturday, 13th February 2016 17:30 - BBC Radio 4This week The Bottom Line investigates how customer service impacts businesses. Read more: The Bottom Line: Winter 2015-16: Customer Service
More or Less: Selfies, sugar daddies, schoolchildren and public spendingSunday, 14th February 2016 20:00 - BBC Radio 4
Canals: The Making of a Nation: EngineeringSunday, 14th February 2016 20:30 - BBC Four
Thinking Allowed 2016: Weather forecasting, Young people and politicsMonday, 15th February 2016 00:15 - BBC Radio 4
The Bottom Line: Winter 2015-16: Customer ServiceAvailable for over a yearThis week The Bottom Line investigates how customer service impacts businesses. Read more: The Bottom Line: Winter 2015-16: Customer Service
More or Less: Selfies, sugar daddies, schoolchildren and public spendingAvailable for over a year
The London Markets: The Fruit And Veg Market: Inside New SpitafieldsAvailable until Sunday, 13th March 2016 00:40
Thinking Allowed 2016: Weather forecasting, Young people and politicsAvailable for over a year
Everybody's looking for loveHaving a learning disability doesn't mean you don't want the same things as other people when it... Read more: Everybody's looking for love
OpenLearn Live: 12th February 2016The last prince of an independent Wales; then more free learning across the day. Read more: OpenLearn Live: 12th February 2016
Landschaftliche VielfaltGerman regions and landscapes, local traditions and the notion of Heimat are at the centre of... Try: Landschaftliche Vielfalt now
Introduction to bookkeeping and accountingLearn about the essential numerical skills required for accounting and bookkeeping. This free... Try: Introduction to bookkeeping and accounting now
Water is arguably the most important physical resource as it is the one that is essential to human survival. Understanding the global water cycle and how we use water is essential to planning a sustainable source of water for the future. In the UK there are areas where water supplies are limited, as shown by recent droughts. Globally, there are many reas that do not have enough water to support the current population adequately. Decisions will have to be made on the best way to use water in a world where there is climate change. Groundwater is a free course that helps you examines the options.
By the end of this free course you should be able to:
- using information from wells, the topography of the ground and a water table contour map, carry out the following: interpret cross-sections, calculate the thickness of the unsaturated zone, and the rate of groundwater flow; deduce the direction in which groundwater is flowing; and estimate the depth to the saline interface in a coastal area from the height of the water table;
- list the types of rock that usually make good aquifers, and assess how good an aquifer a rock could be, given its porosity and hydraulic conductivity;
- distinguish between unconfined and confined aquifers, and recognize conditions in confined aquifers that will produce a flowing artesian well;
- using suitable data, calculate the exploitable storage, specific yield and specific retention of an aquifer.
Study this free course
Enrol to access the full course, get recognition for the skills you learn, track your progress and on completion gain a statement of participation to demonstrate your learning to others. Make your learning visible!
Many people have the impression that underground water occupies vast caverns, such as those in the Derbyshire Peak District, flowing from one cavern to another along underground rivers. This is a common misconception: underground caverns are fairly rare, but huge quantities of water exist underground, within rocks. This is because many rocks contain pores, spaces that come in all shapes and sizes. In sediments, and consequently sedimentary rocks, there are often pores between grains which can be filled with water. There may also be spaces between rock beds or along joints, fractures or fissures which can also contain water. However, before we look at pores in more detail we will examine how water gets into the rock.
This unit is from our archive and is an adapted extract from Earth's physical resources: origin, use and environmental impact (S278) which is no longer taught by The Open University. If you want to study formally with us, you may wish to explore other courses we offer in.
This free course includes adapted extracts from an Open University course which is no longer available to new students. If you found this interesting you could explore more free Environmental Science courses or view the range of currently available OU Environmental Science courses.
Copyright & revisions
Originally published: Monday, 11th July 2011
Last updated on: Thursday, 11th October 2012
- Creative-Commons: The Open University is proud to release this free course under a Creative Commons licence. However, any third-party materials featured within it are used with permission and are not ours to give away. These materials are not subject to the Creative Commons licence. See terms and conditions. Full details can be found in the Acknowledgements and our FAQs section.
- This site has Copy Reuse Tracking enabled - see our FAQs for more information.
If you enjoyed this, why not follow a feed to find out when we have new things like it? Choose an RSS feed from the list below. (Don't know what to do with RSS feeds?)
Remember, you can also make your own, personal feed by combining tags from around OpenLearn.
All our alternative formats are free for you to download, for more information about the different formats we offer please see our FAQs. The most frequently used are Word (for accessibility), PDF (for print) and ePub and Kindle to download to eReaders*.
*Please note you will need an ePub and Mobi reader for these formats.