Zobrazeno 1 - 10
of 325
pro vyhledávání: '"E. Auken"'
Autor:
H. A. Dugan, P. T. Doran, D. Grombacher, E. Auken, T. Bording, N. Foged, N. Foley, J. Mikucki, R. A. Virginia, S. Tulaczyk
Publikováno v:
The Cryosphere, Vol 16, Pp 4977-4983 (2022)
Since the 1960s, a deep groundwater system in Wright Valley, Antarctica, has been the hypothesized source of brines to hypersaline Don Juan Pond and Lake Vanda, both of which are rich in calcium and chloride. Modeling studies do not support other pos
Externí odkaz:
https://doaj.org/article/c2614cb54e364c31b9d9fd93ecec0022
Autor:
P. K. Maurya, F. E. Christensen, M. A. Kass, J. B. Pedersen, R. R. Frederiksen, N. Foged, A. V. Christiansen, E. Auken
Publikováno v:
Hydrology and Earth System Sciences, Vol 26, Pp 2813-2827 (2022)
Imaging geological layers beneath lakes, rivers, and shallow seawater provides detailed information critical for hydrological modeling, geologic studies, contaminant mapping, and more. However, significant engineering and interpretation challenges ha
Externí odkaz:
https://doaj.org/article/5193dda4cf23436bbe6978450251a58b
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 10, Pp 313-323 (2021)
Efficient and accurate acquisition of magnetic field and gradient data have applications over a large range of environmental, archaeological, engineering, and geologic investigations. Developments in new systems and improvements in existing platforms
Externí odkaz:
https://doaj.org/article/935f798fbcc445cfb1d6dcccaca00a27
Autor:
K. F. Myers, P. T. Doran, S. M. Tulaczyk, N. T. Foley, T. S. Bording, E. Auken, H. A. Dugan, J. A. Mikucki, N. Foged, D. Grombacher, R. A. Virginia
Publikováno v:
The Cryosphere, Vol 15, Pp 3577-3593 (2021)
Previous studies of the lakes of the McMurdo Dry Valleys have attempted to constrain lake level history, and results suggest the lakes have undergone hundreds of meters of lake level change within the last 20 000 years. Past studies have utilized the
Externí odkaz:
https://doaj.org/article/e9cafb2d9a644f4cb00564c07869c059
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 10, Pp 81-90 (2021)
The transient electromagnetic method (TEM) is widely used for mapping subsurface resistivity structures, but data are inevitably contaminated by noise from various sources. It is common practice to gate signals from TEM systems to reduce the amount o
Externí odkaz:
https://doaj.org/article/fb42da2546474ec1b852ca39ac110f68
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 8, Pp 1-11 (2019)
Surface nuclear magnetic resonance (surface NMR) has the potential to be an important geophysical method for groundwater investigations, but the technique suffers from a poor signal-to-noise ratio (SNR) and long measurement times. We present a new wi
Externí odkaz:
https://doaj.org/article/95f73bea197740a4bc168435f5b497d3
Publikováno v:
Hydrology and Earth System Sciences, Vol 21, Iss 3, Pp 1527-1545 (2017)
During the last century, many large irrigation projects were carried out in arid lands worldwide. Despite a tremendous increase in food production, a common problem when characterizing these zones is land degradation in the form of waterlogging. A cl
Externí odkaz:
https://doaj.org/article/a4b0cb5b949449a6a4f37d5b0097aba2
Autor:
P. A. Marker, N. Foged, X. He, A. V. Christiansen, J. C. Refsgaard, E. Auken, P. Bauer-Gottwein
Publikováno v:
Hydrology and Earth System Sciences, Vol 19, Iss 9, Pp 3875-3890 (2015)
Large-scale hydrological models are important decision support tools in water resources management. The largest source of uncertainty in such models is the hydrostratigraphic model. Geometry and configuration of hydrogeological units are often poorly
Externí odkaz:
https://doaj.org/article/923c6281fbeb4272a83f2542d4367c1f
Autor:
N. Foged, P. A. Marker, A. V. Christansen, P. Bauer-Gottwein, F. Jørgensen, A.-S. Høyer, E. Auken
Publikováno v:
Hydrology and Earth System Sciences, Vol 18, Iss 11, Pp 4349-4362 (2014)
We present an automatic method for parameterization of a 3-D model of the subsurface, integrating lithological information from boreholes with resistivity models through an inverse optimization, with the objective of further detailing of geological m
Externí odkaz:
https://doaj.org/article/159377c94bea4a52a51dc2a28776f81b
Publikováno v:
Hydrology and Earth System Sciences, Vol 17, Iss 10, Pp 4043-4060 (2013)
Increasingly, ground-based and airborne geophysical data sets are used to inform groundwater models. Recent research focuses on establishing coupling relationships between geophysical and groundwater parameters. To fully exploit such information, thi
Externí odkaz:
https://doaj.org/article/821cf57b16494ef7a527af23c859debf