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

Ballybay River Study.

Extracts from this document...

Introduction

Ballybay River Study Introduction Aims and Objectives - The Ballybay River Study has introduced six new fieldwork techniques. These tasks were to measure the width and depth, wetted perimeter, channel bed gradient, current velocity and bed load of each site. The aims of the study are to work together in a group, each introducing their own knowledge, to help understand, and how to complete each tasks and to understand fully how the river channel changes and why it changes. Our aims are to find if the discharge of the Ballybay River increases downstream, if the river's velocity decreases with distance from the source and the channel efficiency increases downstream. Plus to find out if the following hypotheses matches with the theory - * The discharge of the Ballybay River increases downstream * The river's velocity increases with distance from the source * The channel efficiency increases downstream * The size and shapes of the river's load varies downstream I also aim to test four hypotheses using the data collected from the Ballybay River. ...read more.

Middle

The first site is closest to the source which is on high land near Gosford Forest Park. The sixth site is near Portadown and leads into the River Bann. Sites 2, 3, 4, 5 are found at various places, on long straight, tight bends or near villages. The tasks require equipment which can be seen in photographs throughout the study. The width and the depth task uses a tape measure and metre ruler. The wetted perimeter uses a chain and tape measure. The channel bed gradient includes survey poles and clinometer. For current velocity, a stream flow meter is used and bed load measures thirty random pebbles on a stone board. Using these techniques, the hypothesis should be carried out correctly. On the field trip, group work was organised. There were five groups A - E. Each group has a different task at each site, which can be found on the Group Work Organisation scheme. The data captured at each site will be recorded on Fieldwork Data Sheet. ...read more.

Conclusion

Record reading on the count metre * Repeat 5 times across river in different parts The Gradient of the River Channel Bed - * Measure a distance of 10 metres along the river * One person holds the surveyor's pole upstream in the middle of the channel, the other holds the pole downstream similarly placed * The clinometre is held at the 1.5 metre mark and a sighting is taken to the 1.5m mark on the upstream pole * The clinometre must be held so that the pointer swings freely and a reading should be records when the pointer stops moving * Record 4 readings at each site The Load Size and Shape - * Randomly collect 30 stones from the river bed * Measure its longest length and record it * Identify its shape (rounded, sub-angular or angular) * Return samples to river The Wetted Perimeter of the River - * Stretch chain across river letting it get into all cracks * Hold chain out and measure (with a measuring tape) the length that was under water * Record result. ...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. Study the downstream changes of Loughton Brook.

    The cross-sectional area increased as the stream order increased because of the increasing erosion from the growing amount of water as the river progressed. Vertical and lateral erosion increased due to the river depth and water width respectively.

  2. Microclimates: Detailed Study.

    element can be measured in two different places and still be disimliar. Even if they are measured at the exact same time. This happens because there will be different situations for each of the areas. For example:- if you took a reading from the junior school playground and one from the eastern courtyard.

  1. Geography Coursework: Epping Forest

    Hypothesis 4: The gradient will increase with distance downstream. To measure the gradient we used a clinometer with the two ranging poles. The ranging poles were placed three metres apart and then the clinometer was lined up using the stripes on the ranging poles.

  2. The river Gwaun: Investigating how the course of the river changes from the source ...

    into other rocks (and transferring energy to them which may make them move) or rubbing against the riverbed (Traction) The main processes of erosion are corrasion (see bullet point 1) and attrition (both bullet points). Method The bed load was randomly chosen from the riverbed.

  1. How does Loughton Brook change as it moves downstream?

    This again shows the increase of the efficiency of the river. These 5 graphs can be related to the graphs of the Width so that as the width increases as we move further downstream. The last two graphs interpret the cross section of the river at the meander.

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

    When it reaches the end you stop the timer. To calculate the velocity you use this sum: Discharge I am going to find the discharge because it will show me the changes in the amount of water the river moves every second at each site. I am going to measure the discharge in meters cubed per second or cumecs (m�/s).

  1. Geograpgy glendun river

    Also at this part of the river the route is almost like a horse shoe and eventually, it can get cut off to form an ox-bow lake. At the middle course a flood plain begins to form on the valley floor.

  2. Investigating the river Caerfanell

    and place the pin of the pole on top the rock pointing up straight. - The person marked at 0m should then place the clinometer two-thirds up the pole at the colour change and aim at the exact same point on the other pole.

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