The Marina Barrage built across the Marina Channel creates Singapore's 15th reservoir and first in the city's downtown area. It helps meet over 10% of Singapore's water demand through catchment of rainwater from its 10,000 hectare drainage area. The barrage also controls floods by releasing excess stormwater into the sea through crest gates and pumps. The constant water level makes the reservoir suitable for recreational activities and it has become a lifestyle attraction, with facilities like a green roof, solar panels, and gallery on environmental issues.