Transcript
[Beaver logo]
[A beach | Text : FORILLON NATIONAL PARK ADAPTS TO COASTAL EROSION - part Two of Two]
[A beach with people]
The beaches of Forillon National Park are ideal for loads of activities.
[A road and a belvedere destroyed close to the shore]
But the park’s facilities are being put to the test by coastal erosion.
[A woman wearing Parks Canada uniform on a beach | Text : Marie-Claude Trudel, Public Outreach Officer, Parks Canada]
We know that one of the cause is the climate change.
Because of it, our winters are milder so there is less ice to protect the shores from storms.
But there’s another important cause of accentuated erosion
and it’s the infrastructures themselves, like a riprap, built along the shore.
[A beach and a riprap]
[A man on a beach | Text : Louis Cormier, Research Associate, UQAR]
Riprap has an impact on beaches in dynamic environments or when there are a strong waves …
When waves break on natural beaches, the beach absorbs the energy of the wave across a fairly big distance
[Strong waves on a natural beach]
But when a wave hits a rigid structure like riprap or a wall,
[Strong waves hiting a riprap]
its energy is dissipated upwards or downwards
—often both—which causes backwash.
[Research Associate Louis Cormier on the beach]
When it moves upwards it can overflow and submerge part of the shoreline …
and when it moves downwards it can drain the sediment at the base of the riprap and pull it out to sea.
This lowers the beach and makes the shoreline even more vulnerable to future storms,
[Big waves at sea]
which will roll in with even more energy and have an even greater impact,
intensifying erosion and, in extreme cases, damaging the riprap.
[Parks Canada Public Outreach Officer on the beach]
Thanks to research carried out at Forillon by Université du Québec à Rimouski,
Parks Canada was able to identify appropriate areas to build infrastructure adapted to coastline.
[Aerial photo of a sandy peninsula | text: Penouille Peninsula| a pictogram of a shelter | text: Old Building]
UQAR studies and projections show that by 2050,
[A man wearing Parks Canada uniform on a shore protected by a riprap | text: Frédéric Ste-Croix, Assett Manager, Forillon National Park]
the spot where our former service building stood on Penouille Point will be underwater due to rising sea levels.
[Aerial photo of a sandy peninsula with a perimeter becoming blue | Text: Projection 2050 | pictogram of a shelter| Text: Old services building]
[Damaged building on a beach]
The service building has already been badly damaged by waves and storms.
[Brand new building and boardwalk]
So we built a new building in a zone UQAR identified as stable.
[A loader removing asphalt on a shore]
As for the point’s access road,
the best solution was to replace the regular asphalt and fill material with a raised boardwalk that didn’t interfere with the isthmus
[Wood boardwalk on a shore]
or the movement of the waves.
[Forillon National Park Asset Manager on a shore protected by a riprap]
[Monuments on a beach | text: Carricks' shipwreck, 1847]
For Cap-des-Rosiers, We also had to move the Carrick shipwreck monument
[A loader raising a monument]
to protect it from storms.
[A loader removing rocks from a riprap along the shore]
In the same area,
the work to be done mostly involves dismantling the road that ran along the coast
[A loader removing soil]
dismantling the riprap that protected the road
and reshaping the banks
[Forillon National Park Asset Manager on a shore protected by a riprap]
The new stretch of Highway 132 has been moved further inland,
nearer the forest,
[Big waves splashing a road]
away from the dynamic coastal zone.
[A man on a coast | Text: Christian Fraser, Research Associate, UQAR]
With the riprap gone,
there’s a good chance that the coastline will recede and take its natural shape again,
but probably further inland.
[Black and white picture of a peeble beach |Text: Cap-des-Rosiers, 1930]
During all those years that erosion was being controlled, there probably would have been some gradual natural erosion.
[UQAR Research Associate on the coast]
Removing the riprap in one go, is obviously going to reshape the shoreline and cause it to recede.
But as I mentioned, it will take its natural shape,
the material that’s eroded from the surrounding cliffs will replenish the beach,
so there won’t be that backwash effect.
[Hundreds of fishes rolling on a beach within the waves | Text: Credit: Dave Gilbert Jarvis]
The return of a long beach at Cap-des-Rosiers will delight citizen and visitors, and even fishes.
Indeed the capelin will once again have an habitat to lay its eggs in the beach gravel.
[Parks Canada Public Outreach Officer on the beach]
But, retrofitting current infrastructure to adapt to erosion isn’t enough
we also need to restore the environment by replanting natural vegetation.
[Many people wearing Parks Canada uniform and digging holes in the sand]
Forillon Coastal ecosysteme restoration program includes plantation
principaly of seagrass lyme shoots.
[A man wearing Parks Canada uniform on a beach | Text: Daniel Sigouin, Ecologist, Forillon National Park]
this plant has an extensive root system that help stabilize the shore.
[A woman and a man wearing Parks Canada uniform and planting stems]
So when the asphalt and some buildings will be removed
we will be able to proceed to thoses plantations
With the natural slope, and the combination of thoses plants that stabilize the soil it will help to
[Forillon National Park Ecologist on the beach]
control the energy of the waves and to make our restoration more effective on the long term.
[People having fun on a beach and on the upper beach, a sign «Area closed - Restoration site»]
By building infrastructure suited to coastline shoreline and returning beaches to their natural state,
[Two people walking on a pebble beach]
Forillon National Park is giving visitors the chance to continue to enjoy these seashores
[Marine birds on the sea]
and is protecting the natural and cultural resources found there.
[Parks Canada Public Outreach Officer on the beach]
The conclusion is simple:
the more natural a beach is, the more it will be able to withstand erosion.
[Kids on a sandy beach]
[Eelgrass in the wind]
[Acknowledgements
Laboratoire de dynamique et de gestion intégrée des zones côtières
[Laboratory of coastal area dynamics and integrated management]
Université du Québec à Rimouski
[University of Quebec at Rimouski]
[Production and editing: Duane Cabot, Photo direction : Roger St-Laurent]
[To find out more: pc.gc.ca/Forillon]
[Logo of Forillon National Park and logo of Forillon is invested and adapts to climate change]
[Parks Canada logo]
[Her majesty the Queen in Right of Canada, Represented by Parks Canada, 2016]
[Canada word symbol]