'spatial concentrations' is correct and can be used in written English.
It can be used to describe concentrations of something that occupy a certain area or space. For example, "The health hazard of air pollution is often caused by spatial concentrations of exhaust emissions from motor vehicles."
Military spending creates spatial concentrations of prime contractors, subcontractors, consultants, universities, skilled workers, and government installations, all of which are devoted to research and development on, or the manufacture of, military systems and technologies.
We know that there are spatial concentrations of these initiatives.
Figure 3 shows the spatial concentrations of Cu and Zn in M. tuberculata.
This versatility has been obtained by using thoroughly massed fluxes instead of the usual spatial concentrations.
This suggests that the use of simple spatial concentrations can lead to systematic underestimation of the overall population exposure and the associated health impacts.
More than 50,000 topsoil samples in agricultural soil were used to evaluate spatial concentrations and risks posed by selected metals on a national scale.
Luminescent solar concentrators (LSCs) offer an attractive approach to combine spectral and spatial concentration of both direct and diffuse light without the expensive tracking system.
We live in a free society, of course, but the high-end spatial concentration of income and its associated resources, like well-endowed schools, security, abundant services and political connections, in effect pulls up the drawbridge from our neighbors.
SC(GSI): spatial concentration of the intensity level GSI (in pixel).
Therefore, the spatial concentration concept is introduced as an alternative to the ( overline{mathrm{GSI}} ) comparison.
The spatial concentration SC (GSI) was calculated based on the GSI distribution in the image histogram.
