Field studies for determining the characteristics and dynamics of local circulations

This paper provides an overview of some of the most salient features of valley circulations that influence the dispersion of pollutants. The emphasis is primarily on the most important characteristics of interest to an emergency response manager who must develop emergency preparedness plans for facilities tht may be influenced by valley circulations. The discussions will be centered on the results of the Anderson Creek Valley and the Brush Creek Valley studies, to contrast the characteristics of a pooling valley with those of a draining valley. The paper also provides suggestions on the most critical measurements that are needed to define the behavior of the nocturnal valley flows that may be expected within any given valley. 21 refs., 12 figs.