Watershed Human‐use Level and Water Quality

Lee, Roger D.; Symons, James M.; Robeck, Gordon G.

doi:10.1002/j.1551-8833.1970.tb03933.x

Cited by 13 publications

(5 citation statements)

References 5 publications

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“…Other studies involving recreation on reservoirs did not show deterioration of water quality (2, 15). These latter observations are consistent with other studies that suggest recreational activity does not appreciably influence the bacteriological quality of flowing surface waters (1,13,16,18).…”

supporting

confidence: 93%

Effects of dispersed recreational activities on the microbiological quality of forest surface water

Varness¹,

Pacha²,

Lapen³

1978

Appl Environ Microbiol

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The microbiological quality of forest surface waters in the Greenwater River watershed was examined to investigate the influence of heavy motorized camping in an area with no sanitary facilities. Indicator densities increased during weekend human-use periods when compared to weekdays. Increases in indicator densities were also noted downstream from heavily used camping areas when compared to upstream sites. Seasonal, weekly, and diurnal fluctuations in indicator densities were observed. This study suggests that potential health hazards exist in this watershed during periods of human use.

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supporting

confidence: 93%

Effects of dispersed recreational activities on the microbiological quality of forest surface water

Varness¹,

Pacha²,

Lapen³

1978

Appl Environ Microbiol

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“…Total and fecal coliforms densities varied as a function of sampling days and stations. The inter-station and intra-station variations observed were also apparent in other studies (Hoskins, et al, 1927;Greenfield, 1925;Lee, et al, 1970;and Presnell, et al, 1971).…”

Section: Bacteria Densitiessupporting

confidence: 83%

AN ANALYSIS OF COLIFORM BACTERIA IN THE UPPER ILLINOIS WATERWAY¹

Lin¹,

Evans²

1974

J American Water Resour Assoc

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During the summer of 1971 about 150 water samples were examined for total and fecal coliform bacteria in the Upper Illinois Waterway at 19 river stations. The data per station were found to be normal geometric distributed. Bacteria densities changed with sampling dates and generally decreased with water movement downstream. Several sewage treatment effluents made marked pulses along the bacterial die-off curves. The observed fecal coliform results were evaluated in terms of the Illinois Pollution Control Board's standards. The FC:TC ratio on the waterway for each station were presented. Using Chick's Law, coliforms death rates were estimated. Efforts to correlate observed total and fecal densities with temperature, flow, algal densities, dissolved oxygen, and 5-day biochemical oxygen demand were not successful. (KEY TERMS: algae; biochemical oxygen demand; coliform bacteria; dissolved oxygen; flow; stream survey; temperature; water pollution; water quality standards)

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“…AWWA water quality occurs at the water sup ply intake when recreation is permitted in or around public water supplies.11 On three watersheds of the Pacific Northwest, no measurable influence could be determined on bacterial indi cator population densities because of increased human use, and viruses were not isolated by the culturing methods used on flow-through samples taken. 12 On the other hand, the aspect of viru ses in drinking-water supplies is re ceiving increased attention and has long been of concern to public agencies and officials in San Luis Obispo County. 13 Epidemiological opinion uniformly sup ports the conclusion that infectious hep atitis can be transmitted by ingestion of inadequately treated drinking water, al though water can be adequately treated so that it is always biologically safe.14 San Luis Obispo County has recog nized the inadequacies of the coliform index, including inference for presence or absence of viral organisms, and has adopted a conservative policy in the protection of its public water supply reservoirs against potential contamina tion from recreational use.…”

Section: Water Qualitymentioning

confidence: 99%