Greg Koltun
Greg is an Emeritus Hydrologist and surface-water specialist for the Ohio-Kentucky-Indiana Water Science Center.
He received a B.S. in microbiology and an M.S. in civil engineering from the Ohio State University and has worked on a wide array of research, including topics in hydrology, hydraulics, water quality, water use, modeling, and applied statistics. Greg teaches a USGS national training course on sediment and chemical loading computation methods and was an adjunct professor at the Ohio State University where he taught applied hydrology.
Science and Products
Filter Total Items: 51
Influence of particle-size separation technique on concentrations of sediment-associated trace metals
No abstract available.
Authors
G.F. Koltun, D.R. Helsel
Influence of size-fractioning techniques on concentrations of selected trace metals in bottom materials from two streams in northeastern Ohio
Identical stream-bottom material samples, when fractioned to the same size by different techniques, may contain significantly different trace-metal concentrations. Precision of techniques also may differ, which could affect the ability to discriminate between size-fractioned bottom-material samples having different metal concentrations. Bottom-material samples fractioned to less than 0...
Authors
G. F. Koltun, Dennis R. Helsel
Estimating annual suspended-sediment loads in the northern and central Appalachian Coal region
Multiple-regression equations were developed for estimating the annual suspended-sediment load, for a given year, from small to medium-sized basins in the northern and central parts of the Appalachian coal region. The regression analysis was performed with data for land use, basin characteristics, streamflow, rainfall, and suspended-sediment load for 15 sites in the region. Two variables...
Authors
G. F. Koltun
Science and Products
Filter Total Items: 51
Influence of particle-size separation technique on concentrations of sediment-associated trace metals
No abstract available.
Authors
G.F. Koltun, D.R. Helsel
Influence of size-fractioning techniques on concentrations of selected trace metals in bottom materials from two streams in northeastern Ohio
Identical stream-bottom material samples, when fractioned to the same size by different techniques, may contain significantly different trace-metal concentrations. Precision of techniques also may differ, which could affect the ability to discriminate between size-fractioned bottom-material samples having different metal concentrations. Bottom-material samples fractioned to less than 0...
Authors
G. F. Koltun, Dennis R. Helsel
Estimating annual suspended-sediment loads in the northern and central Appalachian Coal region
Multiple-regression equations were developed for estimating the annual suspended-sediment load, for a given year, from small to medium-sized basins in the northern and central parts of the Appalachian coal region. The regression analysis was performed with data for land use, basin characteristics, streamflow, rainfall, and suspended-sediment load for 15 sites in the region. Two variables...
Authors
G. F. Koltun