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

Variations in River Discharge

Extracts from this document...

Introduction

Variations in River Discharge River Regime This is the annual pattern of a river's discharge in response to the region's climate. The average regime is represented by the average daily/ monthly figures. These figures are mainly determined by the climate e.g. the amount/ distribution of rainfall, plus the rates of evaporation and snowmelt. Variations in River Discharge These variations are very important, as they influence the river's energy and landforms. Factors affecting river discharge may produce the following: Temporal variations (changes over time): * Short term fluctuations in discharge e.g. ...read more.

Middle

The discharge is affected by the climate of the region and many other factors. Temporal Variations Rivers have seasonal fluctuations in their discharge. They are mist pronounced in climates with a wet and dry season e.g. countries with Mediterranean/ monsoon climate and where glaciers feed streams. In Britain there is a maximum winter discharge and a minimum summer discharge which reflect low precipitation totals and high rates of evapotranspiration in the summer. Short term fluctuations of channel discharge are related to individual rainstorms or snowmelt. Spatial Variations Due to the interplay of a variety of factors especially climate and vegetation there are big differences in river regimes for different regions. ...read more.

Conclusion

Channel runoff is short-lived (as flash floods) after heavy rainstorms and covers short distances as it quickly infiltrates the sandy soil. Tundra Regions -North Canada and Russia - Annual precipitation is similar to hot deserts (250mm p/a) and most discharge is intense runoff in the early summer as the inter snow is melting. Discharge is high as the temperatures are low at this time and evapotranspiration is minimal as there is so little vegetation. Some areas have permanently frozen ground (permafrost) which restricts infiltration. There are shot term fluctuations diurnally. Discharges are low overnight and early morning as little melting takes place then. Discharges increase through the day as the ice melts and it peaks in the mid afternoon. ...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. fluvioglacial and glacial variations

    Both are found on the side of a valley however kame terraces are formed by fluvioglaciation deposition and lateral moraines by glacial deposition. Kame terraces are formed when a glacial stream becomes trapped between the side of a valley and the glacier itself.

  2. To assess whether the modified channel of the river ash is effective in reducing ...

    they might have put rounder pebbles in in the first place to reduce friction. Graph 15 Graph 15 shows that a higher percentage (60%) of the pebbles in the modified channel had a high sphericity and 40% of the pebbles in the channel had a low sphericity.

  1. Geography Coursework: Epping Forest

    On the left bank there was a steep river cliff and on the right bank there was an over hang caused by the erosion hydraulic power erosion of the riverbank. The tree roots held this soil together as well and also reduced the erosion slightly because the river had to flow around the roots.

  2. Do the Characteristics of a river change downstream?

    any chance of risk to the group * The methods are fairly self-explanatory and can be followed without any help or guidance. * The group as a whole was able to split up doing the methods saving time and getting more done, as no single method required more than five people.

  1. Define the term permafrost

    This water then freezes and expands forcing the overlying surface material to dome upwards. This kind of pingo is commonly found in Greenland.

  2. Geograpgy glendun river

    Floodplain - A flat, low-lying area near a river or stream which is subject to flooding. Gradient- the steepness of the river Interlocking spurs - spurs of high land which over lap in the upper part of the valley

  1. An investigation into changes in channel parameters down the river Horner

    Discharge Increase As the river gets bigger and holds more water it should have a greater capacity to move the water (discharge). Pebble size Decrease Attrition (explanation in river basics) Pebble shape Become more rounded Method To find the changes in channel parameters down the river Horner I am going

  2. Investigating the river Caerfanell

    This increases the accuracy of my results, as they are not bias whilst trying to represent the whole river. Also by choosing 3 different areas, I will be able to analysis the different processes and features that a river can present downstream therefore gathering a background of the rivers history.

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