State-sponsored Sinhalese colonisation
Sri Lankan state-sponsored colonisation is the government programme of settling mostly Sinhalese farmers from the densely populated wet zone into the sparsely populated areas of the dry zone. This has taken place since the 1950s near tanks and reservoirs being built in major irrigation and hydro-power programmes such as the Mahaweli project.
Source: Wikipedia — State-sponsored Sinhalese colonisation (CC BY-SA 4.0)