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Physical Sciences and Mathematics Commons™
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- Earth temperature--North Dakota; Soil temperature--North Dakota; Climatic changes--North Dakota; Global warming (1)
- Geomagnetic indexes--Testing (1)
- Geomagnetism (1)
- Groundwater--Minnesota--Shingobee Lake; Groundwater flow--Minnesota--Shingobee Lake; Water levels--Minnesota--Shingobee Lake (1)
- Stream ecology--North Dakota--Tongue River; River sediments--North Dakota--Tongue River (1)
Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
The Relationship Of Small Mammal Species To Habitat Variables In West-Central Georgia And East-Central Alabama, Patricia Maureen Kosky
The Relationship Of Small Mammal Species To Habitat Variables In West-Central Georgia And East-Central Alabama, Patricia Maureen Kosky
Theses and Dissertations
The objective of this investigation was to assess the impact of environmental variables upon small mammal species distribution in 60 plots on Fort Benning, Muscogee and Chattahoochee Counties, Georgia and Russell County, Alabama. The small mammal fieldwork was carried out in December of 1994 through January of 1995. The vegetation was inventoried in June through October of 1995. During this period, 235 small mammals were trapped in a total of 5950 trap nights. A total of 10 small mammal species and 234 plant species were identified. The small mammal species abundance's were determined by using snap trapping along the plot …
Testing Of The New Usgs K Index Algorithm At Bear Lake Observatory, Ariel O. Acebal
Testing Of The New Usgs K Index Algorithm At Bear Lake Observatory, Ariel O. Acebal
Theses and Dissertations
The K index was developed by Bartels in 1939 as an estimate of the level of geomagnetic activity caused by the Sun. This index was computed manually every three hours at geomagnetic observatories using the magnetic traces of the surface planetary magnetic field. In 1991, the International Association of Geomagnetism and Aeronomy approved four additional methods to compute the K index; all of them were computer algorithms. One of the approved methods, the Wilson code, recently underwent some modifications. The new algorithm is now part of a Windows-based computer program being developed by the United States Geological Survey (USGS). After …
Air-Ground Temperature Exchange, William L. Schmidt
Air-Ground Temperature Exchange, William L. Schmidt
Theses and Dissertations
Most borehole paleoclimate studies have been based on the assumption that the exchange of temperature between the air and ground surface remains constant. However, secular changes in boundary-layer factors can generate anomalous ground temperatures. This dissertation is an investigation of factors that cause separation of air and ground temperatures on a seasonal to inter-annual time scale, including snow cover duration, latent energy of ground freezing, daily sunlight, precipitation, and vegetation.
Continual records of surface air and near-surface ground temperatures from five sites in North Dakota show similar trends in seasonal air-ground temperature separation. Statistical regressions of mean annual ground temperatures …
Characterization Of Hyporheic Zone Processes Of A Northern Prairie Stream, David B. Rush
Characterization Of Hyporheic Zone Processes Of A Northern Prairie Stream, David B. Rush
Theses and Dissertations
A hyporheic zone occurs beneath and adjacent to streams where surface water and groundwater mix. This zone is known to be a reservoir for solutes and a habitat for interstitial organisms. Hyporheic zone boundaries in the Tongue River, North Dakota, were investigated through examination of the physicochemical and biological gradients present in the stream channel and bank sediments. The effects of cattle grazing at the streamside interface of the riparian zone were also examined at two locations to determine land use impacts on the hyporheic zone.
Electrical conductivity (EC) and ammonium gradients were observed beneath the stream channel via nests …
Small-Scale Variability Of Groundwater-Lake Interaction At Shingobee Lake, Minnesota, Hans F. Kishel
Small-Scale Variability Of Groundwater-Lake Interaction At Shingobee Lake, Minnesota, Hans F. Kishel
Theses and Dissertations
Groundwater discharge is an important contributor to the water budget of a lake. The variability of hydraulic parameters of lake and groundwater systems causes difficulties in estimating the contribution of groundwater to a lake water budget. This study attempts to show that amount of variability for a small portion of the lake and shore (8 x 15 meter section, starting approximately five meters from shore and extending nine meters into the lake).
Piezometers were installed at a depth of one half and one meter in nests at 70 locations in the rectangular study site. Water levels were collected from the …