One could not imagine the city of New York without its colossal skyscrapers. However, the weight of these buildings now represents a danger for the more than 8 million inhabitants. A study published on May 8 in the journal Earth’s Future believes that the largest city in UNITED STATES is facing a risk of flooding due to the rising sea level and sagging.
What is called subsidence is a gradual lowering of the Earth’s surface which can be caused in particular by the pumping of underground water or the weight of cities. This is what is happening in New York. According to new geology research, the metropolis is sinking on average at a rate of 1 to 2 millimeters per year. It may not seem like much, but some parts sag much faster. Part of the neighborhood Manhattan is only 1 or 2 meters above sea level.
To arrive at this estimate, the authors made numerous calculations and estimations. For example, they evaluated the total mass of more than one million New York buildings, or 764,000,000,000 kilograms. A huge weight that does not take into account roads, sidewalks, bridges and railways.
They also used satellite data and studied the composition of the soil. The city’s surficial geology consists of silt, sand, clay lake, beach deposits and rock outcrops among others, the study reads. Soils rich in (…)
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2023-05-17 07:00:00
#York #sink #weight #skyscrapers
