Geographic Processes

Whāinga ako: Lesson Goals

To be able to explain Destructive and Constructive waves and understand how waves change what beaches look like.

Kupu matua - Keywords

Erosion = To erode, break down

Deposition = To deposit, add to

Where have you heard words like this (or similar)?

Mahi - Work

au-l-2550252-weathering-erosion-and-deposition-differentiated-comprehension_ver_3.pdf

Coastal Processes: Erosion, Deposition

Below are two graphics on how waves may interact with the coastline.

Which is constructive (makes)?
Which is destructive (destroys)?

1.-Waves.pptx

Untitled document

Two new words here are SWASH and BACKWASH.

Local Coastal Processes

t2-g-579-features-of-coastline-labelling-activity-sheet-_ver_1.pdf

Each of these features is formed by one or more of the processes we have been discussing.

In New Brighton we have a spit. The New Brighton Spit extends from the New Brighton beach, shaped by longshore drift in the vicinity of the Avon Heathcote estuary. Known as Te Kararo Kararo in Māori, it translates to 'place of the chattering birds.'

It was formed by deforestation by early Māori- sediment travelled down the Waimakariri and Ashley rivers and then drifted (hence the name longsure drift) to create the sand bar we see below.

Have a look on Google Earth to see how this could happen.