Duration: 01:06

An introduction to the Amazon river. Describes the huge floods which occur when the river bursts its banks and shows the great biodiversity of the region.

Duration: 04:24

Rivers that flow through cities can always pose a threat, but MEDC's can afford quite ingenious ways to deal with extraordinary conditions.

Duration: 04:09

The River Waal in the Netherlands used to flood regularly, which created fertile floodplains for farming. River defences were built to contain the river, but when these were breached the flooding problem became much more severe.

Duration: 05:48

The Grand Canyon, although millions of years old, is formed by short, sharp events called flash floods rather than prolonged gentle natural processes.

Duration: 01:15

A report about the construction site of the controversial Gilgel Gibe III hydroelectricity dam in Ethiopia.

Duration: 05:49

Flood season is a difficult time for the communities that live in the Amazon basin as food becomes very scarce. They spend the whole year preparing for the floods in order to survive.

Duration: 05:52

The Mississippi river is a major river found in the USA. In 1993 the river management techniques failed and large areas flooded.

Duration: 01:43

News footage of the River Tay flooding in Scotland in January 1993.

Duration: 02:49

A description of the landforms and land use in the lower course of the River Tay, Scotland.

Duration: 02:20

Describes the characteristics of the middle course of the River Tay, Scotland.

Duration: 02:15

An illustration of the upper course characteristics and landforms of the River Tay, Scotland.

Duration: 01:44

An overview of the River Tay and its course in Scotland, including aerial footage, location maps and graphics.

Duration: 00:27

An illustrated explanation of erosion and the formation of river terraces.

Duration: 00:23

An illustrated explanation of rivers - erosion and hydraulic action.

Duration: 01:46

An illustrated explanation of rivers - meanders.

Duration: 00:55

An illustrated explanation of the formation of cut-off meanders or oxbow lakes along a river.

Duration: 00:41

An illustrated explanation of rivers - weathering, erosion and corrasion.

Duration: 05:40

An explanation of the costs and benefits of the Katse Dam being contructed in Lesotho.

Duration: 01:10

An illustrated explanation of the hydrological cycle, introducing key terms.

Duration: 01:06

The Amazon river contains one fifth of all the world's river water and regularly floods as a result of heavy seasonal rains. The effects of this on vegetation and wildlife are covered.

Duration: 02:34

The Rakaia river in New Zealand flows on a raised bed in braided channels, resembling the mudflats normally associated with a river mouth.

Duration: 02:07

The River Conwy in North Wales flows through Snowdonia. Freeze-thaw weathering creates scree slopes and erosion and deposition transform the landscape.

Duration: 04:19

As the River Severn nears the sea, the floodplain is wide and there is little high ground to build on. The Severn ends in a wide estuary which has a high tidal range.

Duration: 04:28

A description of the River Severn along its upper course. The river transports a large load, which allows rapid erosion to take place - waterfalls and gorges have been formed in the upper course.

Duration: 06:45

An expert from the Environment Agency describes what to look for as the source of the River Thames.

Duration: 03:34

An explanation of how rivers erode the land looking at how, six million years ago, the continents of Europe and Africa moved together and cut off the Mediterranean Sea.

Duration: 04:06

A look at two waterfalls in different stages of development; High Force on the River Tees and an un-named smaller falls on a tributary of the Tees.

Duration: 05:19

A description of the formation of waterfalls and gorges and other erosional and depositional processes along the River Conwy in Wales.

Duration: 02:16

An illustrated explanation of waterfalls and how they are formed.

Duration: 02:00

Watersheds are the dividing lines of mountain ranges and the areas between them are called drainage basins. The River Conwy in Wales is used to illustrate key concepts.