Land reclamation is the idea of getting new land. It is usually done in coastal areas. Sometimes it is also done in areas like rivers and lakes. Usually, there is a natural process which fills such areas with sand, dirt and other materials. Land reclamation uses the same process, which is sped up. In many cases, this is done using dikes. An example where land reclamation is done is the IJsselmeer in the Netherlands.
Sometimes, it is too time-consuming to wait for the land to rise. In that case, it is possible to pump out the water in the enclosed area. This was done in the Netherlands, where many areas are below sea level. The problem with this approach is that it needs to be repeated, for example in the case of heavy rainfall. Few examples are Kansai Airport in Osaka, Japan.
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Land Reclamation in the Beirut Central District