Examples include Glen Canyon National Recreation Area (grey- and black-water discharges from marinas, houseboats, and motorboats), Grand Canyon National Park (bathing in tributaries associated with main-river raft trips), and Yosemite National Park (visitor activity along Merced River streambanks, causing excessive erosion and sedimentation).
(Examples; include; Glen Canyon National Recreation Area) (tributaries; associated; with main-river raft trips) (Glen Canyon National Recreation Area; streambanks; ) (Glen Canyon National Recreation Area; causing; excessive erosion and sedimentation) (Recreation Area; [is] National [of]; Glen Canyon) (Park; [is] National [of]; Grand Canyon) (Park; [is] National [of]; Yosemite)
Examples tributaries Glen Canyon National Recreation Area Glen Canyon National Recreation Area Recreation Area Park Park
include associated streambanks causing [is] National [of] [is] National [of] [is] National [of]
Glen Canyon National Recreation Area
with main-river raft trips
excessive erosion and sedimentation
Glen Canyon
Grand Canyon
Yosemite