Muriwai Measurements
100-150 metres
What is the width of Muriwai Beach at low tide?
The sea that Muriwai is on.
For example, longshore drift, swash and backwash
What is wave transportation?
Waves bending
What is wave refraction?
4-6 metres
What is the height of dunes with spinifex?
26.3m in 3 minutes
What is the speed of Longshore Drift?
2000km
The distance of uninterrupted water that wind blows over to create waves. At Muriwai this is the distance of the Tasman Sea, between the West Coast of the North Island and Australia
What is fetch?
The sun heating up and drying sand so that it is easier for wind to lift and transport
What is insolation?
45 degrees
What is the slope of dunes with marram grass?
2.5km
How long is the distance between Okiritoto Stream and Otakamiro Point?
41km
What is the distance of Muriwai from Auckland CBD?
Fluvial processes
What are processes to do with rivers called?
A native dune colonising plant with roots that grow horizontally.
What is spinifex?
What is the wind speed needed for aeolian transportation?
24 degrees Celcius
Direction prevailing winds and waves coming from
What is important about the southwest?
The water that rushes up the face of a beach after a wave breaks, depositing sand.
What is swash?
A dune colonising plant from Europe and North Africa, with vertical growing roots.
45%
What percent of winds are more than what's needed for Aeolian transportation?
31 km/hr
What is the average wind speed at Muriwai Beach?
The part of Muriwai we are focussing on in the exam.
It slows down the part of the wave in shallower water
What does friction do?
The backward pull or receding movement of water from a wave.
What is backwash?
1.5-2.5 metres
What is the average wave height at Muriwai Beach?