River course project.

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Map of Area

List of Apparatus

* Chain

* Clinometer

* Net

* Bucket

* Tape Measure

* Measuring Poles

* Flow Metre

* Ruler (1 metre)

* Dog Biscuits

* Stop Watch

Aims

* To measure the length of the wetted perimeter

* To measure of the river

* To measure the depth of the river at five different intervals

* To study the velocity of the river at five different intervals

* To measure the gradient of the river

* To study the level of pollution in the river

Methods Used

Wetted Perimeter

Measuring the length of the river 4 sites along Afon Conwy 10m sections.

A chain (red) and a tape measure were used to work out the wetted perimeter.

The chain from the water surface on one bank was taken to the opposite bank and the length of the chain was measured.

Measuring the Wetted Perimeter (above)

Width

Measuring the Width (below)

A tape was used to measure the water surface on one bank to the water surface on the other bank. (Hypothesis 1)

Depth

The width of the channel was taken and divided into six. The depth was measured at five different intervals using a 1 metre ruler. (Hypothesis 3)
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Velocity

Measuring the Velocity (below)

The width of the channel was taken and divided into six. The flow meter was two-thirds of the way down and timed 30 seconds to see how many revolutions the impeller turned in order to work out the velocity of the river using a flow chart.

Dog biscuits were then used to test the surface velocity of the water. The biscuit was dropped in and timed how long it took to travel 10 meters. (Hypothesis 2)

Gradient

Two poles were used 10 metres apart from each other, and ...

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