In Amsterdam, an initiative to transform rooftops into botanical spaces is making a huge difference to areas prone to flooding. The concept known as “sponge city”, involves installing gardens of water-loving plants and soil on rooftops. These gardens absorb excess rainwater, which can then be used in buildings for tasks like flushing toilets or watering plants. When heavy rains are predicted, a smart valve system releases stored water into the municipal drains, freeing up rooftop space to absorb more water. So far, 45-thousand square meters of roofs in Amsterdam have been fitted with these systems.
These green roofs can hold more than 120-thousand gallons of water, promising long-term savings on water utilities and damage repair. Besides flood control, these green roofs cool buildings naturally and assist solar panels in generating more energy. By reducing flooding and conserving water, Amsterdam’s sponge rooftops offer a sustainable solution for urban areas worldwide.
