Can we stop freshwater from vanishing into the ocean by damming the sea?
Rivers constantly dump precious freshwater into the salty ocean, a massive loss for human consumption. This video explores the concept of coastal reservoirs—man-made freshwater lakes carved directly out of the sea—and examines the practical benefits and drawbacks of this ambitious engineering solution.
A coastal reservoir functions by damming a portion of the ocean to trap river water before it mixes with salt water. This creates a contained freshwater body in an environment that would otherwise be saline.
The video investigates the trade-offs of this technology, weighing the potential for increased water security against the environmental and structural challenges inherent in walling off sections of the coastline.
