• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

River Landscapes and Processes

Extracts from this document...

Introduction

River Landscapes and Processes Some important words and definitions: 1. Fluvial Landscape - a landscape created by rivers and their tributaries. 2. Tributary - a small river or stream which joins to a larger one. 3. River or drainage basin - an area drained by a single river together with all of its tributaries. 4. Confluence - where 2 or more streams, rivers or tributaries join together. 5. Watershed - The boundary line between different river/drainage basins. (Sometimes these are referred to as Catchment areas) 6. Source - The starting point of a river or stream. (watercourse) - This maybe a spring or just an area of boggy/marshy land. ...read more.

Middle

There are 4 main processes by which a river can cause erosion (wearing away) and 4 processes by which a river can transport (move) material. * Processes of erosion 1. Attrition - breaking up of material into smaller and smaller particles. 2. Corrosion - fire material rubs (like sandpaper) and gradually wears away the channel sides. 3. Corrosion - dilute acids in water help break down and dissolve particles. 4. Hydraulic Action - the sheer force of flowing water "hitting" the banks causes them to be worn away and collapse. * Processes of transportation 1. Traction - the movement of large rocks and boulders along the channel - usually in times of flood. ...read more.

Conclusion

This is more usual in mountainous areas nearer to the source of the river. Here the river forms a series of characteristic landforms which include "V" - shaped valley with interlocking spurs as well as waterfalls and rapids. The Formation of a Cap Rock Waterfall How do meanders and oxbow lakes form? As rivers get nearer to their mouths they flow in increasingly wide gentle sided valleys (with a saucer shape cross-section.) The channel increases in width and depth and the natural physical process causes it to 2meander" (from the River Meander in N. America). As a river goes round a bend most of the water is pushed to the outside of the bend and erosion takes place. The opposite happens on the inside of the bend - where deposition takes place Cross Section of a river bend Diagrams showing the formation of meanders and ox-bow lakes ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Hydrology & Fluvial Geomorphology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Hydrology & Fluvial Geomorphology essays

  1. Hydrology and Fluvial geomorphology. (Q&A)

    There are several factors that affect the lag time of a drainage basin. Firstly, the size of the river basin itself is important - a larger basin will mean that water has further to travel to reach the main channel.

  2. Geography investigation - The River Skirfare located in the Littondale region in the Yorkshire ...

    Hence, the process of erosion occurs more frequently at Arncliffe than at Halton Gill. This goes a long way in explaining how the material at Arncliffe is smaller and more rounded than at Halton Gill. Upstream there is a smaller river with a smaller discharge and width.

  1. Investigating the river Caerfanell

    We can clearly see that cross sectional area, roughness, and velocity all increase as you move downstream. The only factor that doesn't is gradient, which instead generally decreases downstream. There is an explanation of why these trends occur earlier on in this part of data presentation.

  2. Geograpgy glendun river

    There were five sites to visit. We collected the same data at each stage of the river. We started at site one at the source; we were in groups of about 6, we all collected different bits of data and recorded it on are data collection sheets.

  1. River channel processes.

    WATERFALLS - these result from a most resistant or tougher rock. A step will form because when the waterfalls erodes away the rock, the tougher rock will erode slower and so the rock before it will erode away quicker as opposed to that of the tougher rock and so this

  2. Do the Characteristics of a river change downstream?

    The string was kept taught to ensure accurate results. This made it easier to measure the width and depth and gave an indication of direction. After setting this up we measured the width of the stream with a metre rule and along the piece of string we marked a line every ten centimetres.

  1. Does the river Alyn follow Bradshaw's model?

    It is also important that you know the geometry of the river in built up areas so that you can predict how the rivers course, size, or flow might change and take action. Location The river on which I am investigating velocity and discharge is the river Alyn.

  2. Water on the Land - Channel processes and landforms.

    As the river moves into the middle and lower courses, it is here that the other form of erosion takes place. Lateral erosion is specific to these sections of the river because the declining gradient and increasing discharge means that the river has surplus energy and begins to erode sideways.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work