Map shows Glen Canyon National Recreation Area and Lake Powell in relation to plateaus and surrounding Navajo Indian Reservation lands.
NPS
Noise model shows how noise from air tours distributes over Lake Powell, Glen Canyon National Recreation Area, Utah. The outer dotted, black lines show park boundaries for the lower, southwest area of the park. Dotted orange lines show aircraft flight tracks. Equivalent sound level is expressed from least (purple) to most noise (orange). Planners use acoustic footprints such as this to evaluate the distribution and duration of noise over a park relative to sensitive natural and cultural areas.
