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Pain, Pus & PoisonFriday, 27th February 2015 00:00 - BBC FourPain, Pus and Poison tells the extraordinary story of how mankind learnt to look at the world around him and use it... Read more: OU on the BBC: Pain, Pus and Poison: The Search For Modern Medicines
Waiting in Line: The Business of QueuingSaturday, 28th February 2015 17:30 - BBC Radio 4
Inside the Commons - Episode 4Saturday, 28th February 2015 21:15 - BBC Two Scotland only
Thinking Allowed: Migration to London and South AfricaMonday, 2nd March 2015 00:15 - BBC Radio 4
Inside the Commons - Episode 3Available until Friday, 13th March 2015 15:00This week's Inside the Commons asks whether the three-party system is falling apart at the seams. Read more: OU on the BBC: Inside the Commons - Episode 3
Blackhat, dark night: Could hackers really cause a power outage?Although the nuclear meltdown depicted in Blackhat is fiction, Mike Richards warns there are... Read more: Blackhat, dark night: Could hackers really cause a power outage?
OU on the BBC: Inside the CommonsThis major four-part series from inside the House Of Commons gives viewers unparalleled access to... Read more: OU on the BBC: Inside the Commons
Succeed with maths – Part 1 [TEST]DO NOT ATTEMPT TO COMPLETE THIS COURSE. IT IS ENTIRELY FOR OPENLEARN TESTING PURPOSES. Try: Succeed with maths – Part 1 [TEST] now
Succeed with maths – Part 1[BETA] If you feel that maths is a mystery that you want to unravel then this short 8-week course... Try: Succeed with maths – Part 1 now
Water is arguably the most important physical resource as it is the one that is...
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 area areas where water supplies are limited, shown by recent droughts. Globally, there are many areas that do not have enought water to support the currently population adequately. Decisions will have to be made on the best way to use water in a world where there is climate change.
By the end of this unit you should be able to:
- list the types of springs, and how each type relates to a different geological setting;
- use hydrographs to distinguish overland flow and interflow from baseflow, and make inferences about the climate of an area;
- expain how various changes in land use in a river catchment will change the hydrograph of a river;
- distinguish the different types of reservoir construction, and decide whether a particular area would be suitable for a reservoir, suggest the most suitable type of dam for a site, and summarize the side-effects of constructing reservoirs.
- Current section: Introduction
- Learning outcomes
- 1 Springs
- 2 River flow
- 3 Reservoirs
- 4 Summary
We have seen that where precipitation reaches the ground, some runs off the surface into streams and rivers and some of it infiltrates, passing through the soil. Water that reaches the water table to become groundwater may eventually re-emerge at the surface as springs where the water table intersects the surface. Almost all streams and rivers have springs or seepages as their ultimate source, or are fed by them at various points along their courses.
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 is an extract 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 course units or view the range of currently available OU Environmental Science courses.