We have just received the video and narration from David l. Schultz, P.E (Professional Engineer) who lives in America. He has extensively studied the benefits and effects of Holmberg Technologies; Undercurrent Stabilisers for shoreline protection.
The video explains more about the effects on the shoreline with the use of vertical sea walls, groins and rock revetments.
Showing posts with label Other Shoreline Protection Methods. Show all posts
Showing posts with label Other Shoreline Protection Methods. Show all posts
this post yet to be filled with information about the use of Sand Replenishment for shoreline protection and their effects on the environment.
this post yet to be filled with information about the use of Groynes for shoreline protection and their effects on the environment.
Above the Plymouth Breakwaters.
Sea walls and groynes
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A common response to erosion has been to construct sea walls and groynes (low barriers built out into the sea). Sea walls are common around the Waitematā Harbour in Auckland and the Wellington waterfront. Although these structures stabilise the coast, they cause more erosion at adjacent coasts, merely shifting the problem or creating a new one. They also cause the loss of any beach in front of the structure at high tide (this occurred at Wellington’s Oriental Bay).
In recent years it has been argued that constructing sea walls and groynes is inconsistent with the principles of the Resource Management Act.
We can learn from Auckland's experience. source
Auckland City are spending millions of dollars on fixing up the beach erosion caused by seawalls and stormwater drains. They wish they could get them back to a natural state like we still have at Tahunanui.
Coastal Hazards FAQs
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Planning for Coastal Hazards is a statutory requirement for the Whakatane District Council under the Resource Management Act 1991 (RMA). The requirements include:
Illegal seawalls being constructed at Mokau
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