What are we going to do at the field trip?

Field Excursion You will be working in groups to collect data near the estuary of a small river as well as a shingle beach. Groups will be assigned and data collected and shared within these groups. In addition you will be given data from the upper course of the river. At home you will work in groups and use the collected data to write a small report. You will carry out 6 investigations, however the report will only utilise 3 of those measurements, contained in the following hypothesis: Hypothesis 1: The size river channel increases downstream. Hypothesis 2: Sediment is smaller and more rounded downstream. Hypothesis 3: The velocity of the river increases as the river channel increases.

Task 1 Draw a labelled diagram of the river, detailing all features you can find. Note the direction and bearing the river flows in. When making either a field sketch or sketch map, you should remember the following: Your field sketch or sketch map does not have to be a work of art Draw in pencil in case you make a mistake Draw the main features first. In a map this maybe the roads, rivers, coastline, outlines of settlements, etc. In a field sketch this might be the horizon, the outline of hills, settlements, areas of vegetation, etc. If you use colour or symbols remember to make a key Add labels or short annotations to your diagram.

Task 1

Task 2 Measure 30 stones along their longest axis and record the findings. Investigate the roundness and sphericity of these 20 stones. 6 cm Choose the 20 rocks by running a measuring tape perpendicular to the shore and choosing rocks every 10 cm Task 2: Size of stones (cm) – measured along the longest axis Roundness / Sphericity of Rocks (mark correct box)   Very Angular Angular Sub-angular Sub-rounded Rounded Very Rounded High Sphericity Medium Sphericity Low Sphericity 1   5 9 13 17 2 6 10 14 18 3 7 11 15 19 4 8 12 16 20

Task 2 Measure 30 stones along their longest axis and record the findings. Investigate the roundness and sphericity of these 20 stones. Task 2: Size of stones (cm) – measured along the longest axis 1  6 cm 5   9 13 17 2  12 cm 6 10 14 18 3 …  7 11 15 19 4 8 12 16 20 Roundness / Sphericity of Rocks (mark correct box)   Very Angular Angular Sub-angular Sub-rounded Rounded Very Rounded High Sphericity  IIII II  I Medium Sphericity  IIII Low Sphericity II 

Task 3 Measure how wide the river is with measuring tape Measure the width of the river, the wetted perimeter and create a cross section by measuring the depth every 50cm across. Measure how wide the river is with measuring tape Measure depth at 50cm across, 100cm across etc Measure wetted perimeter by placing measuring tape along bottom channel

Distance from bank (cm) Task 3 Task 3: Width: 3,20m Wetted Perimeter: 4,67m Distance from bank (cm) 50 100 150 200  250   300  320   Depth (cm)  12 15  26  27   38 16   0

Task 4 Measure the velocity of the river. Measure the distance from start to finish line We will only be using 1 channel but if the river is very wide it is often better to measure the speed on different sides Measure the time, with a watch of how long it takes for the float to reach finish Repeat

Task 4 Measure the velocity of the river. Velocity of River Distance between start and finish: _______10m_________________ Time 1 12 sec  Time 2   Time 3 Time 4 Time 5 Measure the distance from start to finish line We will only be using 1 channel but if the river is very wide it is often better to measure the speed on different sides Measure the time, with a watch of how long it takes for the float to reach finish Repeat

Task 5 Measure the gradient of the beach. Use ranging poles and place at “break of slope” aka where the gradient changes Measure and record distance between ranging poles Look along the edge of the protractor to the top of the upper ranging pole Person reads degree reading of clinometer Repeat for each section of gradient

Task 5 Measure the gradient of the beach. Task 5: Gradient of beach   Distance between ranging poles (meters) Angle (degrees) Part 1  16, 3 m  12 Part 2 Part 3

Task 6 Measure the speed of longshore drift. Choose 10 pebbles of aproximately equal size Mark with paint Place at starting point Measure how far the rocks have travelled after 10 min

https://www.youtube.com/watch?v=M1Tb7HsEtOM