BY CHLOE MC KENNA

A River Study Focusing On River Processes At Dún na

Rí

Aims

To investigate fluvial processes at two sites and compare and contrast them.

Team Members

ChloeAilbheCarolineAnna

Equipment

Rubber glovesWelliesPen and paperClip boardMapResults sheets Powerscale of roundness chart Stop watch Tennis ballsMetre stick Measuring stick

Objectives

To measure width and depth and calculate CSA ( cross sectional area )

To measure velocityTo check bedload, shape and sizeTo observe both sites and take field notes Draw sketches

Preparation To revise chapter on o.s maps Practice drawing map sketchesPractice drawing sketches of rivers

What we did ?Cross Section Of River Channel Using a measuring tape across from waters

edge to the other side of river. Record results.Using a measuring stick measure the depth of

the river at 5 places across the river channel. Twice at each bank and once in the middle. Record results.

Velocity/Speed Of The River2 members of the group went into the river

and stood approximately 5 metres apart.One person releases a tennis ball into the

river while the other member on the bank records the length of time with a stopwatch, it takes the ball to float from one person to the other.

Record the result .This is done twice across the river.

Load, Size & Shape

Using rubber gloves at 4/5 points across the river reach in and pick up the first pebble you touch.

Using chart for roundess of pebbles classify each pebble accordingly.

Record results.

The End