The phrase "a floating population" is correct and usable in written English.
It is typically used to refer to a group of people who move frequently or do not have a permanent residence, often in the context of urban studies or demographics.
Example: "The city has a floating population of migrant workers who come and go depending on the season."
Alternatives: "transient population" or "mobile population".
There is also a floating population that sleeps overnight in the country's many 24-hour Internet cafes and saunas.
In this iconic boarding house, Wilson condenses the experiences of a floating population of African-Americans, who find themselves ill-equipped to survive their emancipation.
At the bottom of the heap, a "floating population" of about 130m migrants work in China's boomtowns, taking home 1,348 yuan a month on average last year.
They are part of a "floating population" that moves around from season to season, getting temporary jobs for as long as they are available, with no rights or access to services.
A floating population of perhaps as many as 100,000 laborers, most of them Moroccan, pick the tomatoes, strawberries and eggplants or move with the seasons to harvest olives and oranges around Andalusia.
When labour was abundant, it suited the government to have a floating population that made few demands on urban authorities and drifted back to the family farm whenever hardship beckoned.
The island then was not the popular tourist destination it later became; the author George Woodbury described it as "no city of homes; it was a place of temporary sojourn and refreshment for a literally floating population," continuing, "The only permanent residents were the piratical camp followers, the traders, and the hangers-on; all others were transient".
In China, the pattern is predominantly one of a vast floating population of migrant workers who follow jobs from city to city.
In addition to the city's population, there is frequently a large floating population of pilgrims, who sometimes bring the bodies of the deceased for interment or come with elderly and infirm family members who wish to live their last days in the holy city before being buried there.
We conclude that people adapted their routines to play the game, concentrating geographically in places with a high floating population.
The hospital has 100 beds and assists a large floating population including 10 000 hospitalisations, 57 000 emergencies and 152 892 laboratory requests (12 206 from the inpatient ward) annually.
