APII TE UKI OU

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APII TE UKI OU

• Sandwatch Project 2007
• Kakera Beach

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OUR SANDWATCH TEAM
ROCK

• Kevin
• Teariki
• Derek
• Marino
• Emily
• Maeva

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OUR SCHOOL IS RIGHT ON THE BEACH

• This means there are good things and bad things
  happening

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THE BEACH, location

• Kakera Beach

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BEACH MAP
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BEACH PROFILE

• The beach slopes gently down from the green edge
  and then there is a steep drop where the high
  tide mark is. After that the beach slopes again
  until it hits the low tide mark and water.

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WHAT WE DID

• Beach measurements
• Beach samples using a grid
• Sand samples
• Beach activities
• History of beach
• Looked at ways to protect the beach

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BEACH MEASURMENTS

• We took measurements from three points along the
  beach down to the high tide mark

• The measurements showed changes in the size of
  the beach.
• We think these changes were due to tidal
  differences.
• If we took measurements over a longer period of
  time we think it would show more significant
  changes.
• We know there have been changes in the size of
  the beach because people who lived here sixty
  years ago told us the beach was wider.

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BEACH SAMPLES

• We used a grid and noted what we found in each
  square of the grid.

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Sample of what we found

• The beach was made up of a mixture of rocks,
  sand, coral and debris

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SAND SAMPLES

• We looked at sand samples under a magnifying
  glass
• The sand on Kakera beach is very angular and made
  up of a mixture of broken shells, rocks, some
  glass from broken bottles, small bits of wood,
  dead animals and coral.

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BEACH HISTORY

• We talked to people who had lived near the beach
  a long time ago

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What they said

• 60yrs ago the beach was all sandy
• It was good for fishing and shell fish
• Cyclones brought the stones and coral up on to
  the beach
• There are more cyclones now

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BEACH ACTIVITY

• We noted what activities happen on our beach

• We saw someone fishing one morning
• People paddle past
• Now and then someone walks on the beach
• People go diving
• People go surfing
• We use the beach for school studies

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Whale watch platform
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We can watch whales going past
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What we observed

• The beach is not used very often
• The beach is rocky and steep
• Someone has used machinery to make a flat area on
  the beach that can be used

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WHAT DAMAGES OUR BEACH

• Cyclones and bad weather
• Waves
• People machinery
• Rubbish

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CYCLONE DAMAGE

• The cyclones showed us an instant overnight
  example of how waves and bad weather can change a
  beach.

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CYCLONE DAMAGE

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Protecting our beach

• CPU
• Rock walls
• Stones in baskets (or Gabions)
• Planting hardy vegetation

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Manmade protection
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Cost of manmade protection

• Rock walls may cost 100/cubic metre
• CPUs may cost 500/cubic metre
• The total cost of a rock wall for a typical
  beachfront section might cost 20,000.

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Natural Protection

• We looked at vegetation on the beach side of the
  school
• We noted that during the cyclones vegetation in
• front of the preschool helped stop some damage

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• In front of the school the plants were mostly,
• the plant we call poison lilly and the
  pohutukawa.
• For better protection we should plant hardy trees
  and plants 

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Recommendations

• Manmade protection units do work to reduce the
  impact of the waves. But they are expensive and
  do not look good in the natural environment
• To protect the school grounds we should plant
  protective hardy vegetation, this is less
  expensive and more easily renewable.

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Apii Te Uki Ou presents