scholarly journals Spatial and Temporal Characterization of Escherichia coli, Suspended Particulate Matter and Land Use Practice Relationships in a Mixed-Land Use Contemporary Watershed

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1228
Author(s):  
Fritz Petersen ◽  
Jason A. Hubbart
Keyword(s):  
Land Use ◽  
Particulate Matter ◽  
Suspended Particulate Matter ◽  
Agricultural Land ◽  
Agricultural Land Use ◽  
Land Use Impacts ◽  
E Coli ◽  
Suspended Particulate ◽  
Mixed Land Use ◽  
Land Use Practices

Understanding land use practice induced increases in Escherichia (E.) coli and suspended particulate matter (SPM) concentrations is necessary to improve water quality. Weekly stream water samples were collected from 22 stream gauging sites with varying land use practices in a representative contemporary mixed-land use watershed of the eastern USA. Over the period of one annual year, Escherichia (E.) coli colony forming units (CFU per 100 mL) were compared to suspended particulate matter (SPM) concentrations (mg/L) and land use practices. Agricultural land use sub-catchments comprised elevated E. coli concentrations (avg. 560 CFU per 100 mL) compared to proximate mixed development (avg. 330 CFU per 100 mL) and forested (avg. 206 CFU per 100 mL) sub-catchments. Additionally, agricultural land use showed statistically significant relationships (p < 0.01) between annual E. coli and SPM concentration data. Quarterly PCA biplots displayed temporal variability in land use impacts on E. coli and SPM concentrations, with agricultural land use being closely correlated with both pollutants during Quarters 2 and 3 but not Quarters 1 and 4. The data collected during this investigation advance the understanding of land use impacts on fecal contamination in receiving waters, thereby informing land use managers on the best management practices to reduce exposure risks.

scholarly journals Quantifying Escherichia coli and Suspended Particulate Matter Concentrations in a Mixed-Land Use Appalachian Watershed

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 532 ◽  
Author(s):  
Fritz Petersen ◽  
Jason A. Hubbart
Keyword(s):  
Land Use ◽  
Particulate Matter ◽  
Suspended Particulate Matter ◽  
Stream Water ◽  
Mitigation Strategies ◽  
E Coli ◽  
Suspended Particulate ◽  
Mixed Land Use ◽  
Research Stream ◽  
Land Use Practices

The relationships between Escherichia (E) coli concentration, suspended particulate matter (SPM) particle size class, and land use practices are important in reducing the bacterium’s persistence and health risks. However, surprisingly few studies have been performed that quantify these relationships. Conceivably, such information would advance mitigation strategies for practices that address specific SPM size classes and, by proxy, E. coli concentration. To advance this needed area of research, stream water was sampled from varying dominant land use practices in West Run Watershed, a representative mixed-land use Appalachian watershed of West Virginia in the eastern USA. Water samples were filtered into three SPM intervals (<5 µm; 5 µm to 60 μm; and >60 μm) and the E. coli concentration (colony forming units, CFU) and SPM of each interval was quantified. Statistically significant relationships were identified between E. coli concentrations and size intervals (α < 0.0001), and SPM (α = 0.05). The results show a predominance (90% of total) of E. coli CFUs in the <5 μm SPM interval. The results show that land use practices impact the relationships between SPM and E. coli concentrations. Future work should include additional combined factors that influence bacterial CFUs and SPM, including hydrology, climate, geochemistry and nutrients.

scholarly journals Comparative Simulation of Various Agricultural Land Use Practices for Analysis of Impacts on Environments

Environments ◽  
2017 ◽  
Vol 4 (4) ◽  
pp. 92 ◽  
Author(s):  
Vladimir Badenko ◽  
Galina Badenko ◽  
Alex Topaj ◽  
Sergey Medvedev ◽  
Elena Zakharova ◽  
...  
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Agricultural Land Use ◽  
Land Use Practices

Nitrate leaching to groundwater

1982 ◽  
Vol 296 (1082) ◽  
pp. 477-489 ◽  
Keyword(s):  
Land Use ◽  
Potable Water ◽  
Agricultural Land ◽  
Agricultural Soils ◽  
Research Effort ◽  
Groundwater Resources ◽  
Agricultural Land Use ◽  
Supply Industry ◽  
Land Use Practices

Groundwater provides over 30% of developed supplies of potable water in Britain. The outcrops of the important aquifers form extensive tracts of agricultural land. Groundwater resources largely originate as rainfall that infiltrates this land. During the 1970s, growing concern about rising, or elevated, groundwater nitrate concentrations, in relation to current drinking water standards, stimulated a major national research effort on the extent of diffuse pollution resulting from agricultural land-use practices. The results presented derive from intensive and continuing studies of a number of small groundwater catchments in eastern England. It is in this predominantly arable region that the groundwater nitrate problem is most widespread and severe. The distribution of nitrate in the unsaturated and saturated zones of the aquifers concerned is summarized. These data have important implications for the water-supply industry, but their interpretation is discussed primarily in relation to what can be deduced about both the recent and long-term histories of leaching from the more permeable agricultural soils.

Agricultural land use practices and nitrate contamination in the Abbotsford Aquifer, British Columbia, Canada

1998 ◽  
Vol 69 (2) ◽  
pp. 99-112 ◽  
Author(s):  
B.J Zebarth ◽  
B Hii ◽  
H Liebscher ◽  
K Chipperfield ◽  
J.W Paul ◽  
...  
Keyword(s):  
Land Use ◽  
British Columbia ◽  
Agricultural Land ◽  
Nitrate Contamination ◽  
Agricultural Land Use ◽  
Land Use Practices
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