A5006944390- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Climate variability and models
- Cryospheric studies and observations
- Climate change and permafrost
- Groundwater and Watershed Analysis
- Hydrology and Watershed Management Studies
- Peatlands and Wetlands Ecology
- Soil and Water Nutrient Dynamics
- Invertebrate Taxonomy and Ecology
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Geological Modeling and Analysis
- Forest ecology and management
- Geological Studies and Exploration
- Coastal wetland ecosystem dynamics
- Geology and Paleoclimatology Research
- Water Quality and Resources Studies
- Water resources management and optimization
- Forest Ecology and Biodiversity Studies
University of Nebraska–Lincoln
2019-2022
University of Victoria
2016-2021
Colorado State University
2015-2016
Waters (United States)
2015-2016
Abstract. In areas with a seasonal snowpack, warmer climate could cause less snowfall, shallower and change in the timing of snowmelt, all which reduce winter albedo yield an increase net short-wave radiation. Trends temperature, precipitation (total as snow), days snow, were investigated over 60-year period from 1951 to 2010 for 20 meteorological stations across Northern Great Plains. This is area where snow accumulation shallow but persistent most (November March). The consistent trends...
Abstract The sustainability of groundwater resources for agricultural and domestic use is dependent on both the recharge rate quality. main purpose this study was to improve understanding timing, or seasonality, through stable isotopes. Based 768 samples collected from aquifers underlying natural districts in Nebraska, isotopic composition (δ 2 H δ 18 O) compared with that precipitation by (a) mapping (b) a seasonality index groundwater. Results suggest majority state, has nongrowing season...
Historically, snowpack trends have been assessed using one fixed date to represent peak snow accumulation prior the onset of melt. Subsequent trend analyses considered water equivalent (SWE), but SWE can vary by several months due inter-annual variability in and melt patterns. A 2018 assessment evaluated monthly trends. However, since month is a societal construct, this current work examines daily SWE, cumulative precipitation, temperature. The method was applied 13 telemetry stations...
Hydrology and geochemistry studies were conducted in the Athabasca Oil Sands region to better understand water nitrogen cycles at two selected sites order assess potential for transport between adjacent terrain units. A bog—poor fen—upland system was instrumented near Mariana Lakes (ML) (55.899° N, 112.090° W) a rich JPH (57.122° 111.444° W), 100 km south 45 north of Fort McMurray, Alberta respectively. LiDAR surveys initially delineate watershed boundaries topography select range specific...
Groundwater age-dating is an important tool for quantifying and managing water resources. age the elapsed time between recharge (at land surface or table) when groundwater sampled. If sampled at point of discharge from aquifer, then represents transit time. that has recharged in recent decades considered young groundwater. In many areas, quality quantity been impacted by human activities useful current historical contaminant fluxes into through aquifers. This review focused on tritium-helium...
Abstract. In areas with a seasonal snowpack, warmer climate would cause less snowfall, shallower snowpack and change in the timing of snowmelt. Trends temperature, precipitation (total as snow), days snow, winter albedo were investigated over 60 year period from 1951 to 2010 for 20 meteorological stations across Northern Great Plains. This is an area where snow accumulation shallow but persistent most (November through March). The consistent trends minimum temperature precipitation, which...
First posted May 24, 2024 For additional information, contact: Director, Nebraska Water Science CenterU.S. Geological Survey5231 South 19th StreetLincoln, NE 68512Contact Pubs Warehouse Population in western Sarpy County, Nebraska, has steadily increased over the last several decades and led to groundwater use for domestic purposes. To meet increase demand, Papio-Missouri River Natural Resources District is seeking all available sources of County. Additionally, elevated nitrate plus nitrite...
Areas of intensive agriculture and irrigation are prone to groundwater nitrate contamination, which can threaten drinking water supplies. Irrigation center pivots a common feature in heavily irrigated regions have the potential provide insight into subsurface redox chemistry. In this study, we hypothesized that same geochemical condition(s) causes rust staining on pivot systems will strongly influence concentrations. south central Nebraska, 700 were classified by appearance iron (full rust,...
First posted March 22, 2023 For additional information, contact: Director, Nebraska Water Science Center U.S. Geological Survey5231 South 19th Street Lincoln, NE 68512Contact Pubs Warehouse A study in cooperation with the Papio-Missouri River Natural Resources District was completed 2019 to determine concentration of contaminants emerging concern (CEC) groundwater District, eastern Nebraska. Each well sampled twice (in June and October or November) 2019, totaling 34 samples. Samples were...