'population concentration' is correct and usable in written English.
You can use it to refer to a situation where people are densely concentrated in a particular area. For example, "The population concentration during the summer months when tourists come to visit is much higher than at other times of the year."
As most of the houses are concentrated in rural neighborhoods of Nepal suggested by 83%% population concentration in suburbs and rural setups (CBS 2012), majority fraction of wall system is incorporated by mud bonded bricks or stones, bamboo and wooden planks for walls.
Patchily distributed habitats that encourage population concentration?
This would have allowed for greater population concentration.
"Colorado really is one of the most urbanized states in the country, in terms of population concentration," Carpenter said.
The greatest population concentration is in Reykjavík and its environs, with about three-fifths of Iceland's total population.
Increasingly population concentration in urban areas created difficult housing conditions and resulted in the rapid increase in housing prices, exacerbating problems for individuals with low incomes.
The heaviest population concentrations are in the delta and on the Khorat Plateau.
Since the 9/11 attacks, the NYPD intelligence unit has spent its resources meticulously charting, as the NYPD report put it, "the largest geographic population concentrations of people from countries of concern".
The primary cause of this is high urban population concentrations, which create steep land prices and housing costs.
Farther to the north, from Bolivia to Colombia, the largest population concentrations and most of the important cities of these countries are found in the Andes.
These are mega rural regions whose densities are comparable to the population concentrations found in exurbs of Los Angeles, New York or Toronto.
