Analyses of recreational water quality as related to sediment resuspension
AuthorDoyle, Jack David.
Water quality -- Arizona.
Lakes -- Recreational use -- Arizona.
Suspended sediments -- Arizona.
Committee ChairBrickler, Stanley K.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractAquatic sediments, at a lake beach site in the Tonto National Forest, Arizona, were experimentally disrutped to quantitatively determine the impact of sediment resuspension on recreational water quality. Sediment resuspension was found to significantly degrade the quality of recreational waters. Mean sediment fecal coliform densities exceeded mean fecal coliform densities in overlying waters by 24.7 fold. When these sediments were experimentally disrupted, fecal coliform densities and turbidity levels in the water column increased by 1.4 to 2.8 and 1.1 to 5.4 fold, respectively. The impact of sediment resuspension on overlying waters was short-lived at the point of disruption. Increasing FC densities and turbidities generally peaked within 5 sec of resuspension and declined to preresuspension levels within 500 sec. The magnitude of the resuspension impact was most significantly influenced by water depth. The greatest risk to public health was found to be within the 0.3 m depth zone; that near-shoreline area most intensively used by young children for water play.
Degree NamePh. D.
Degree ProgramRenewable Natural Resources