Coastal Guardians: Combating Erosion with Innovation in France

The video explores the issue of coastal erosion in France, focusing on the Aquitaine and Mediterranean coasts. It discusses the natural and human-induced causes of erosion, such as reduced sediment supply from rivers and the impact of waves. The video highlights the effects on coastal communities and presents various solutions, including natural barriers and innovative engineering techniques like geotextile dikes, to mitigate the problem.

What is one of the main reasons for the retreat of coastlines in France?

• Decreased tourism

• Rising temperatures

• Wave assaults

• Increased rainfall

How did sand originally reach the coasts according to the video?

• From ocean currents

• Via rivers eroding mountains

• By wind carrying it from deserts

• Through volcanic eruptions

What natural method is used to stabilize sand dunes?

• Planting beach grass

• Using plastic barriers

• Installing metal fences

• Building concrete walls

What is the purpose of the wooden stakes called wind breaks?

• To mark property boundaries

• To prevent animals from entering

• To support the growth of trees

• To accumulate sand behind them

What innovative solution is used in Cannes to reduce wave impact?

• Metal nets

• Concrete barriers

• Geotextile tubes filled with sand

• Floating buoys

What is the expected lifespan of the geotextile tube system?

• 10 years

• 50 years

• 100 years

• 200 years

How much did the geotextile tubes reduce the need for sand replenishment?

• By 100%

• By 50%

• By 25%

• By 10%