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: 52
Flooding and sedimentation in Wheeling Creek basin, Belmont County, Ohio
The Wheeling Creek basin, which is located primarily in Belmont County, Ohio, experienced three damaging floods and four less severe floods during the 29-month period from February 1979 through June 1981. Residents of the basin became concerned about factors that could have affected the severity and frequency of out-of-bank floods. In response to those concerns, the U.S. Geological...
Authors
J.R. Kolva, Greg F. Koltun
Influence of particle-size separation technique on concentrations of sediment-associated trace metals
No abstract available.
Authors
Greg 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
Greg 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
Greg F. Koltun
Science and Products
Filter Total Items: 52
Flooding and sedimentation in Wheeling Creek basin, Belmont County, Ohio
The Wheeling Creek basin, which is located primarily in Belmont County, Ohio, experienced three damaging floods and four less severe floods during the 29-month period from February 1979 through June 1981. Residents of the basin became concerned about factors that could have affected the severity and frequency of out-of-bank floods. In response to those concerns, the U.S. Geological...
Authors
J.R. Kolva, Greg F. Koltun
Influence of particle-size separation technique on concentrations of sediment-associated trace metals
No abstract available.
Authors
Greg 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
Greg 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
Greg F. Koltun