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Articles 1 - 30 of 3981

Full-Text Articles in Physical Sciences and Mathematics

Dissolved Solids Sampling Sites And Zones Of Concentration Jan 9999

Dissolved Solids Sampling Sites And Zones Of Concentration

Conservation and Survey Division

No abstract provided.


Topographic Regions Of Nebraska, G. E. Condra Jan 9999

Topographic Regions Of Nebraska, G. E. Condra

Conservation and Survey Division

No abstract provided.


Branched Oak Lake State Recreation Area Jan 9999

Branched Oak Lake State Recreation Area

Conservation and Survey Division

No abstract provided.


Nebraska County Map Jan 9999

Nebraska County Map

Conservation and Survey Division

No abstract provided.


Nebraska Map Of Counties, Conservation Survey Division Jan 9999

Nebraska Map Of Counties, Conservation Survey Division

Conservation and Survey Division

No abstract provided.


Statewide Precipitation And Discharge Of Platte River Above Ashland, Bryce B. Pease Jan 9999

Statewide Precipitation And Discharge Of Platte River Above Ashland, Bryce B. Pease

Conservation and Survey Division

No abstract provided.


Generalized Classification Of Economic Minerals Jan 9999

Generalized Classification Of Economic Minerals

Conservation and Survey Division

No abstract provided.


Holdrege: Nebraska's State Soil Jan 9999

Holdrege: Nebraska's State Soil

Conservation and Survey Division

No abstract provided.


Metric System Vs. Inch-Pound Units Jan 9999

Metric System Vs. Inch-Pound Units

Conservation and Survey Division

No abstract provided.


Groundwater Regions In Nebraska Jan 9999

Groundwater Regions In Nebraska

Conservation and Survey Division

No abstract provided.


Areas In Nebraska Of Subirrigated Vegetation, John Elder Jan 9999

Areas In Nebraska Of Subirrigated Vegetation, John Elder

Conservation and Survey Division

No abstract provided.


Nebraska Natural Resource District Boundaries Jan 9999

Nebraska Natural Resource District Boundaries

Conservation and Survey Division

No abstract provided.


Transmissivity Of The Principal Aquifer In Nebraska Jan 9999

Transmissivity Of The Principal Aquifer In Nebraska

Conservation and Survey Division

No abstract provided.


Development Of A Land Cover Characteristics Data Base For The Conterminous U.S., Thomas R. Loveland, James W. Merchant, Donald O. Ohlen, Jesslyn F. Brown Jan 9999

Development Of A Land Cover Characteristics Data Base For The Conterminous U.S., Thomas R. Loveland, James W. Merchant, Donald O. Ohlen, Jesslyn F. Brown

Conservation and Survey Division

No abstract provided.


Distribution And Thickness Of Glacial Till In Nebraska. Jan 9999

Distribution And Thickness Of Glacial Till In Nebraska.

Conservation and Survey Division

No abstract provided.


Irrigation Water Diagram Jan 9999

Irrigation Water Diagram

Conservation and Survey Division

No abstract provided.


Generalized Soil Map Of Nebraska Jan 9999

Generalized Soil Map Of Nebraska

Conservation and Survey Division

No abstract provided.


Nebraska Groundwater In Storage, Conservation Survey Division Jan 9999

Nebraska Groundwater In Storage, Conservation Survey Division

Conservation and Survey Division

No abstract provided.


Report Of The Nebraska Conservation And Soil Survey, G. E. Condra Jan 9999

Report Of The Nebraska Conservation And Soil Survey, G. E. Condra

Conservation and Survey Division

No abstract provided.


Precambrian Rock Descriptions From Deep Wells In Nebraska, E. Liedecke Jan 9999

Precambrian Rock Descriptions From Deep Wells In Nebraska, E. Liedecke

Conservation and Survey Division

No abstract provided.


High Resolution Spatial Variability In Spring Snowmelt For An Arctic Shrub-Tundra Watershed, Branden J. Walker, Philip Marsh Dr Jan 2019

High Resolution Spatial Variability In Spring Snowmelt For An Arctic Shrub-Tundra Watershed, Branden J. Walker, Philip Marsh Dr

Theses and Dissertations (Comprehensive)

Arctic tundra environments are characterized by spatially heterogeneous end-of-winter snow cover because of high winds that erode, transport and deposit snow over the winter. This spatially variable end-of-winter snow cover subsequently influences the spatial and temporal variability of snowmelt and results in a patchy snowcover over the melt period. Documenting changes in both snow cover area (SCA) and snow water equivalent (SWE) during the spring melt is essential for understanding hydrological systems, but the lack of high-resolution SCA and SWE datasets that accurately capture micro-scale changes are not commonly available, and do not exist for the Canadian Arctic. This study ...


Evaluation Of A Sequential Pond System For Detention And Treatment Of Runoff At Skypark, Santa's Village, Elizabeth Caporuscio Dec 2018

Evaluation Of A Sequential Pond System For Detention And Treatment Of Runoff At Skypark, Santa's Village, Elizabeth Caporuscio

Electronic Theses, Projects, and Dissertations

Understanding the extent to which human activities impact surface water resources has become increasingly important as both human population growth and related landscape changes impact water quality and quantity across varying geographical scales. Skypark, Santa’s Village is a 233.76-acre tourism-based outdoor recreation area located in Skyforest, California residing within the San Bernardino National Forest. The park is situated at Hooks Creek, the headwaters of the Mojave River Watershed, and is characterized by a diverse landscape that includes forest cover and human development, including impervious surfaces, a restored meadow, and recreational trails. In 2016, Hencks Meadow was considered degraded ...


Evolution Of Noble Gas And Water Isotopes Along The Regional Groundwater Flow Path Of The Konya Closed Basin, Turkey, N. Nur Ozyurt, C. Serdar Bayari Nov 2018

Evolution Of Noble Gas And Water Isotopes Along The Regional Groundwater Flow Path Of The Konya Closed Basin, Turkey, N. Nur Ozyurt, C. Serdar Bayari

International Journal of Speleology

Noble gas and water isotope compositions of regional groundwater were investigated along two transects in the Konya Closed Basin (KCB) of central Turkey. According to the 3He/4He versus Ne/He plot of samples, crust (up to 86%) and mantle (up to 26%) appear to be the primary and secondary sources of dissolved He in groundwater, respectively. After the beginning of both transects where the flow domain is confined, both 3He and 4He accumulate steadily in groundwater. Thereafter, the intermediate recharge from the surface in the unconfined part of regional flow system disrupts the steady accumulation ...


Interpreting The Origin And Evolution Of ‘Karst’ Features From A Siliceous Hydrothermal Terrane: A Case Study From The Upper Geyser Basin In Yellowstone National Park, Usa, Kevin W. Blackwood, Lainee A. Sanders, Stacy I. Gantt-Blackwood Nov 2018

Interpreting The Origin And Evolution Of ‘Karst’ Features From A Siliceous Hydrothermal Terrane: A Case Study From The Upper Geyser Basin In Yellowstone National Park, Usa, Kevin W. Blackwood, Lainee A. Sanders, Stacy I. Gantt-Blackwood

International Journal of Speleology

The Upper Geyser Basin in Yellowstone National Park occurs over a siliceous hydrothermal terrane containing numerous hot springs and geysers. The pool and vent-conduit geometries of these hydrothermal features share a resemblance to conventional karst features known from other rock types, suggesting karst processes could be responsible for their origin and/or evolution. Hypogene speleogenesis is a cave-forming process in which the formation of caves is decoupled from and occurs independently of surface recharge. The geologic setting for hypogene speleogenesis typically occurs at the distal end of regional groundwater systems wherein the hydrogeology is manifested by ascending fluids and/or ...


Assessing Water Policy Implications Of The Changing Agriculture In New Mexico, Trevor A. Birt Nov 2018

Assessing Water Policy Implications Of The Changing Agriculture In New Mexico, Trevor A. Birt

Shared Knowledge Conference

Agriculture is the dominant water sector in New Mexico, responsible for more than 80% of water withdrawals in 2015 (USGS 2018). Water policy needs to be extremely adaptive and informed to meet the needs of not only farmers, but cities, industry and riparian uses. Since 1840, the U.S. Department of Agriculture (USDA) has conducted census surveys assessing all levels of agriculture. These data are physically published at the county, state, and national level on a 5-year cycle, detailing various material counts such as acreage, yields, and water usage, as well as socioeconomic estimates of farm costs, revenues, and hired ...


Natural Trace Element Salinization Of The Jemez River, New Mexico By Geothermal Springs And Major Tributaries, Jon K. Golla, Laura J. Crossey, Abdul-Mehdi S. Ali, Karl E. Karlstrom Nov 2018

Natural Trace Element Salinization Of The Jemez River, New Mexico By Geothermal Springs And Major Tributaries, Jon K. Golla, Laura J. Crossey, Abdul-Mehdi S. Ali, Karl E. Karlstrom

Shared Knowledge Conference

The Jemez River (JR), a tributary of the Rio Grande, is in north-central New Mexico within the Jemez Mountains, which houses the active, high-temperature (≤ 300 oC), liquid-dominated Valles Caldera geothermal system (VC). This work focuses on the northern portion of the JR, spanning a reach from the East Fork JR to the town of San Ysidro. Previous decadal work during low-flow or baseflow conditions (~10-20 cfs) has identified and characterized significant major-solute contributions from two outflow expressions of the VC, Soda Dam Springs and Jemez Hot Springs, and two major tributaries, Rio San Antonio and Rio Guadalupe. There is generally ...


Sediment Dynamics In The Bear River-Mud Lake-Bear Lake System, Patrick Belmont, Mitchell Donovan, Janice Brahney, Lindsay Capito, Zach Burgert Nov 2018

Sediment Dynamics In The Bear River-Mud Lake-Bear Lake System, Patrick Belmont, Mitchell Donovan, Janice Brahney, Lindsay Capito, Zach Burgert

Watershed Sciences Faculty Publications

The overarching goal of this project was to compile and analyze a variety of existing datasets, and generate several new datasets, to advance our understanding of how the Bear River Mud Lake-Bear Lake system functions, how it has, or is expected to change, identify which components are degraded or vulnerable to degradation, and determine if/where critical data and/or knowledge gaps exist. We conducted a series of analyses to evaluate changes in hydrology and suspended sediment, collected sediment cores from nine locations in Mud Lake to evaluate how sedimentation rates, sediment sources and water quality have changed over time ...


Imaging The Subsurface: The Effect Of Logjams On Groundwater-Surface Water Exchange, Teodora Mitroi, Megan Doughty, Jackie Randall, Kamini Singha Nov 2018

Imaging The Subsurface: The Effect Of Logjams On Groundwater-Surface Water Exchange, Teodora Mitroi, Megan Doughty, Jackie Randall, Kamini Singha

Georgia Undergraduate Research Conference (GURC)

Conventional methods of quantifying subsurface interactions in streams are often insufficient in characterizing hydrological processes and demand better techniques to measure complex dynamics. Point-measurements are incomplete and do not provide direct data on hyporheic exchange, a mixing of surface and subsurface water under and around a stream capable of influencing ecosystem processes. Fortunately, geophysical techniques can improve analysis of the hyporheic zone. For the first time in a field setting, we apply electrical resistivity imaging (ERI) to a mountainous stream below a channel-spanning logjam to estimate the extent of hyporheic exchange. Previous studies suggest logjams increase hydraulic resistance and drive ...


Groundwater Contamination At Coal Ash Deposit Sites In Kentucky, Brandon Rose Nov 2018

Groundwater Contamination At Coal Ash Deposit Sites In Kentucky, Brandon Rose

Scholars Week

No abstract provided.


Groundwater Recharge Response To Reduced Irrigation Pumping In Western Nebraska, Justin Philip Gibson Nov 2018

Groundwater Recharge Response To Reduced Irrigation Pumping In Western Nebraska, Justin Philip Gibson

Dissertations & Theses in Natural Resources

Given current and continued investment in irrigation scheduling technologies, a need exists to better estimate the longevity and magnitude of water savings at watershed level to avoid the paradox of irrigation efficiency. This paradox occurs within a watershed as not all irrigation inefficiencies lead to the system losing water. For example, irrigation pumping rates in excess of crop water demand may lead to enhanced groundwater recharge or surface runoff that migrates to a stream. Thus, increases in efficiency may not lead to similar magnitudes of water savings. I hypothesize that water savings longevities are short given previous work demonstrating rapid ...