John A. Helfrich

Publications

367

Citations

H-Index

1985

Active since

Affiliations

University of Illinois Urbana-Champaign(Current)

John A. Helfrich is an author at University of Illinois Urbana-Champaign specializing in engineering, environmental engineering, and environmental chemistry.

Top concepts

EngineeringEnvironmental EngineeringHydrologyStatisticsInformationWater QualityCivil EngineeringSediment TransportEnvironmental ChemistryEnvironmental Monitoring

Publications per year

1985–1986

Publications

Practical Guide for Ground-water Sampling

Michael J. Barcelona, James P. Gibb, John A. Helfrich et al. · 1985 · 136 citations

Engineering, Subsurface Hydrology, Water Monitoring +3

Sampling Tubing Effects on Groundwater Samples

Michael J. Barcelona, John A. Helfrich, Edward E. Garske · Analytical Chemistry · 1985 · 88 citations

Groundwater Quality, Environmental Monitoring, Engineering +21

Well construction and purging effects on ground-water samples

Michael J. Barcelona, John A. Helfrich · Environmental Science & Technology · 1986 · 73 citations

Groundwater Quality, Environmental Monitoring, Engineering +18

Polycyclic Aromatic Hydrocarbons in Sediments of the Southern Basin of Lake Michigan

John A. Helfrich, David E. Armstrong · Journal of Great Lakes Research · 1986 · 70 citations

Organic Geochemistry, Environmental Chemistry, Engineering +10

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