Land reclamation
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.