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1

Series available for loan

Water quality in the Cook Inlet Basin, Alaska, 1998-2001 (2004)

Glass, Roy L. ; Brabets, Timothy P. ; Frenzel, Steven A.

Washington, DC [u.a.] : United States Gov. Print. Off.

Associated volumes

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Call number: S 90.0003(1249)

In: U.S. Geological Survey circular

Type of Medium: Series available for loan

Pages: vi, 32 S. , Ill., Kt. , 28 cm

Series Statement: U.S. Geological Survey circular 1240

Classification:

Hydrology

Location: Lower compact magazine

Branch Library: GFZ Library

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2

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Comparison of Methods for Estimating Ground-Water Pumpage for Irrigation (1985)

Frenzel, Steven A.

Oxford, UK : Blackwell Publishing Ltd

Ground water 23 (1985), S. 0

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ISSN: 1745-6584

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences

Notes: Ground-water pumpage for irrigation was measured at 32 sites on the eastern Snake River Plain in southern Idaho during 1983. Pumpage at these sites also was estimated by three commonly used methods, and pumpage estimates were compared to measured values to determine the accuracy of each estimate.Statistical comparisons of estimated and metered pumpage using an F-test showed that only estimates made using the instantaneous discharge method were not significantly different (α. = 0.01) from metered values.Pumpage estimates made using the power consumption method reflect variability in pumping efficiency among sites. Pumpage estimates made using the crop-consumptive use method reflect variability in water-management practices. Pumpage estimates made using the instantaneous discharge method reflect variability in discharges at each site during the irrigation season.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1745-6584.1985.tb02795.x

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3

Electronic Resource

FECAL-INDICATOR BACTERIA IN STREAMS ALONG A GRADIENT OF RESIDENTIAL DEVELOPMENT (2002)

Frenzel, Steven A. ; Couvillion, Charles S.

Oxford, UK : Blackwell Publishing Ltd

Journal of the American Water Resources Association 38 (2002), S. 0

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ISSN: 1752-1688

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Architecture, Civil Engineering, Surveying , Geography

Notes: : Fecal-indicator bacteria were sampled at 14 stream sites in Anchorage, Alaska, USA, as part of a study to determine the effects of urbanization on water quality. Population density in the subbasins sampled ranged from zero to 1,750 persons per square kilometer. Higher concentrations of fecal-coliform, E. coli, and enterococci bacteria were measured at the most urbanized sites. Although fecal-indicator bacteria concentrations were higher in summer than in winter, seasonal differences in bacteria concentrations generally were not significant. Areas served by sewer systems had significantly higher fecal-indicator bacteria concentrations than did areas served by septic systems. The areas served by sewer systems also had storm drains that discharged directly to the streams, whereas storm sewers were not present in the areas served by septic systems. Fecal-indicator bacteria concentrations were highly variable over a two-day period of stable streamflow, which may have implications for testing of compliance to water-quality standards.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1752-1688.2002.tb01550.x

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4

Electronic Resource

Relations of Fish Community Composition to Environmental Variables in Streams of Central Nebraska, USA (1996)

Frenzel, Steven A. ; Swanson, Robert B.

Springer

Environmental management 20 (1996), S. 689-705

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ISSN: 1432-1009

Keywords: KEY WORDS: Canonical correspondence analysis; Fish communities; Environmental variables; Index of biotic integrity; National Water-Quality Assessment Program; Nebraska

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: Abstract. Nine sites on streams in the Platte River Basin in central Nebraska were sampled as part of the US Geological Survey's National Water-Quality Assessment Program during 1993–1994. A combination of canonical correspondence analysis and an index of biotic integrity determined from fish community data produced complementary evaluations of water-quality conditions. Results of the canonical correspondence analysis were useful in showing which environmental variables were significant in differentiating fish communities at the nine sites. Five environmental variables were statistically significant in the analysis. Median specific conductance of water samples collected at a site accounted for the largest amount of variability in the species data. Although the percentage of the basin as cropland was not the first variable chosen in a forward selection process, it was the most strongly correlated with the first ordination axis. A rangeland-dominated site was distinguished from all others along that axis. Median orthophosphate concentration of samples collected in the year up to the time of fish sampling was most strongly correlated with the second ordination axis. The index of biotic integrity produced results that could be interpreted in terms of the relative water quality between sites. Sites draining nearly 100% cropland had the lowest scores for two individual metrics of the index of biotic integrity that were related to species tolerance. Effective monitoring of water quality could be achieved by coupling methods that address both the ecological components of fish communities and their statistical relationships to environmental factors.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01204140

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5

Electronic Resource

Relations of fish community composition to environmental variables in streams of central Nebraska, USA (1996)

Frenzel, Steven A. ; Swanson, Robert B.

Springer

Environmental management 20 (1996), S. 689-705

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Details

ISSN: 1432-1009

Keywords: Canonical correspondence analysis ; Fish communities ; Environmental variables ; Index of biotic integrity ; National Water-Quality Assessment Program ; Nebraska

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: Abstract Nine sites on streams in the Platte River Basin in central Nebraska were sampled as part of the US Geological Survey's National Water-Quality Assessment Program during 1993–1994. A combination of canonical correspondence analysis and an index of biotic integrity determined from fish community data produced complementary evaluations of water-quality conditions. Results of the canonical correspondence analysis were useful in showing which environmental variables were significant in differentiating fish communities at the nine sites. Five environmental variables were statistically significant in the analysis. Median specific conductance of water samples collected at a site accounted for the largest amount of variability in the species data. Although the percentage of the basin as cropland was not the first variable chosen in a forward selection process, it was the most strongly correlated with the first ordination axis. A rangeland-dominated site was distinguished from all others along that axis. Median orthophosphate concentration of samples collected in the year up to the time of fish sampling was most strongly correlated with the second ordination axis. The index of biotic integrity produced results that could be interpreted in terms of the relative water quality between sites. Sites draining nearly 100% cropland had the lowest scores for two individual metrics of the index of biotic integrity that were related to species tolerance. Effective monitoring of water quality could be achieved by coupling methods that address both the ecological components of fish communities and their statistical relationships to environmental factors.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01204140

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