Zobrazeno 1 - 9 of 9 pro vyhledávání: '"G R Hallberg"'
1
Separating preferential and matrix flows using subsurface tile flow data1
Autor: G. R. Hallberg, Ramesh S. Kanwar, Ajay Kumar
Publikováno v: Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology. 32:1711-1729
Preferential flow is primary mechanism for faster movement of agricultural chemicals to groundwater. Subsurface tile flow data were used to quantify the contributions of preferential flow and matrix flow at the field scale over time. Tile flow hydrog
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e425a0b3b16a8df51d817e094697f11
https://doi.org/10.1080/10934529709376639
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2
Modelling spatial variability of saturated hydraulic conductivity using Fourier series analysis
Autor: Ajay Kumar, G. R. Hallberg, Ramesh S. Kanwar
Publikováno v: Hydrological Sciences Journal. 39:143-156
A study was conducted to develop a computer model to simulate the spatial variability of field-measured saturated hydraulic conductivity (Ks ) using Fourier series analysis. Ks measurements, both in situ and in the laboratory, were made at 150 and 30
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::123b7aed17763e01d17b42068469a0ea
https://doi.org/10.1080/02626669409492730
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3
Borehole Shear Test in Geotechnical Investigations
Autor: Alan J. Lutenegger, G. R. Hallberg
The concept of Borehole Shear presents a unique alternative in shear strength testing of soil and rock in that tests may be conducted rapidly on the sides of the hole on relatively undisturbed material; therefore the inherent problems associated with
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eee2ee41ac6fdd4a4f51194751049ba1
https://doi.org/10.1520/stp28771s
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6
The nitrate contamination of private well water in Iowa
Autor: J K Johnson, Burton C. Kross, D. R. Bruner, G R Hallberg, K Cherryholmes
The State-Wide Rural Well-Water Survey was conducted between April 1988 and June 1989. About 18% of Iowa's private, rural drinking-water wells contain nitrate above the recommended health advisory level (levels of NO3-N greater than 10 mg/L); 37% of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60fe3e7f391a487fc8e5829caf6e4757
https://europepmc.org/articles/PMC1694569/
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8
Stability of loess
Autor: G. R. Hallberg, Alan J. Lutenegger
Publikováno v: Engineering Geology. 25:247-261
Lutenegger, A.J. and Hallberg, G.R., 1988. Stability of loess. Eng. Geol., 25: 247–261. The natural stability of loess soils can be related to fundamental geotechnical properties such as Atterberg limits, water content and void ratio. Field observa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3f898cdfcf15a4a396f0e879b90dac8f
https://doi.org/10.1016/0013-7952(88)90030-0
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