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Investigate change in river characteristics down stream.

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Introduction

Introduction Route of inquiry � Hypothesis (Statements that can be tested) - I will be collecting data to help me prove these theories. � Method (to ensure a fair test) � Results - taken from measurements I collect whilst conducting my investigation. � Presentation discussion � -Graphs � -Calculations � Limitations - these will be included in my evaluation, and I will comment on how I could have changed my investigation to help me reduce these. � Conclusion -Accept or reject hypothesis [were they right or wrong?] Aim My aim is to investigate change in river characteristics down stream. After investigating these characteristics, I will take my findings and use them to produce an easily annotated series of graphs. Hopefully, my findings will help me to prove my theory that certain characteristics change with distance downstream. After annotating my graphs, I will draw a meaningful conclusion from my analysis of the findings I receive during this investigation. Hypothesis The hypothesis is that Depth, Width and Velocity all change in certain ways such as, increasing with distance downstream, that Gradient decreases with distance downstream and, the size of Pebbles decrease and the shape will become rounder. Maps of area studied These are maps of the areas I studied for my geography field coursework. ...read more.

Middle

A problem doing so is that the tape measure may have gone slack half way across the stream. The reasons for using a measuring tape is that the measuring could be done quickly and that way we do not have cart around lots of heavy equipment, as the measuring tape is light and compact. Height of left and right bank Using ranging poles and meter sticks I measured the height of the left and right bank of the river. I cannot think of way that this could be made easier or better. These were used as we could measure the ranging poles and then place them in the ground then measure the distance between the poles and the riverbank. River velocity To measure the velocity of the stream I used a cork and one meter of string we then timed it with a stopwatch. The problem being that the cork sometimes got caught among the reeds. I used cork, string and a stopwatch because then I could time to see how long it takes the cork to travel one meter, therefore giving me the information to calculate the velocity of the river. The reason for me using such methods is that, in my opinion they are the methods that will give me optimal results within my available equipment. ...read more.

Conclusion

The graph also shows this. Width increases with distance downstream. Measuring the width of the river at all three sites proved this. The graph shows this. Gradient decreases with distance downstream. Proved by measuring the gradient of all three sites. The graph shows that this is true and gradient does decrease with distance downstream. Velocity increases with distance downstream. Disproved by collecting data on the speed (velocity) of the river. The graph shows that this hypothesis is untrue. If I were to conduct the experiment again, I would change the positioning of the sites so as to make it fairer. The first site would be the river source. The second would be at the middle of the river and the third would be at the end of the river. That way it makes the hypothesis easier to test and makes the collection of data fairer. My results show, and help to prove that my hypotheses were all correct and my graphs show that this is true. My graphs depict an honest trend/pattern in my results for each hypothesis and, that my prediction of these things happening was correct. My cross sections also show that, my hypotheses are correct and this evidence you can gain from examining them. If you look closely, you will see that all the processes mentioned in my hypothesis do in fact, increase or in some cases decrease with distance downstream. ...read more.

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