<P> In a number of other jurisdictions, including parts of the United States, the term "reclamation" can refer to returning disturbed lands to an improved state . In Alberta, Canada, for example, reclamation is defined by the provincial government as "The process of reconverting disturbed land to its former or other productive uses ." In Oceania it is frequently referred to as land rehabilitation . </P> <P> Land reclamation can be achieved with a number of different methods . The most simple method involves simply filling the area with large amounts of heavy rock and / or cement, then filling with clay and dirt until the desired height is reached . The process is called "infilling" and the material used to fill the space is generically called "infill". Draining of submerged wetlands is often used to reclaim land for agricultural use . Deep cement mixing is used typically in situations in which the material displaced by either dredging or draining may be contaminated and hence needs to be contained . </P> <P> The creation of new land was for the need of human activities . </P> <P> Notable examples include: </P>

Why was it necessary to reclaim land in bombay