A5054562072- Hydrology and Watershed Management Studies
- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Soil and Water Nutrient Dynamics
- Cryospheric studies and observations
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Water Quality and Resources Studies
- Soil and Unsaturated Flow
- Mine drainage and remediation techniques
- Analytical chemistry methods development
- Water Quality and Pollution Assessment
- Forest Ecology and Biodiversity Studies
- Water Treatment and Disinfection
- Forest Management and Policy
- Radioactive contamination and transfer
- Fire effects on ecosystems
- Water Quality Monitoring Technologies
- Urban Stormwater Management Solutions
- Climate variability and models
- Geological Modeling and Analysis
- Field-Flow Fractionation Techniques
- Oil Spill Detection and Mitigation
- Aerosol Filtration and Electrostatic Precipitation
Lawrence Berkeley National Laboratory
2023-2025
Rocky Mountain Biological Laboratory
2020-2025
ETH Zurich
2023
University of Leeds
2023
National Cancer Registry
2013
École Polytechnique
1986
Hôpital Saint-Michel
1986
Amsterdam University of Applied Sciences
1986
Abstract Understanding the partitioning of snow and rain contributing to either catchment streamflow or evapotranspiration (ET) is critical relevance for water management in response climate change. To investigate this partitioning, we use endmember splitting mixing analyses based on stable isotope ( 18 O) data from nine headwater catchments East River, Colorado. Our results show that one third partitions ET 13% snowmelt sustains summer streamflow. Only 8% rainfall contributes streamflow,...
Abstract Isotopic information from 81 snowpits was collected over a 5‐year period in large, Colorado watershed. Data spans gradients elevation, aspect, vegetation, and seasonal climate. They are combined with overlapping campaigns for water isotopes precipitation snowmelt, land‐surface model detailed estimates of snowfall climate at sample locations. Snowfall isotopic inputs, describe the majority δ 18 O snowpack variability. Aspect is secondary control, slightly more enriched conditions on...
Abstract. About 80 % of the precipitation at Colorado River's headwaters is snow, and resulting snowmelt-driven hydrograph a crucial water source for about 40 million people. Snowmelt from alpine subalpine snowpack contributes substantially to groundwater recharge river flow. However, dynamics snowmelt progression are not well understood because observations high-elevation difficult due challenging access in complex mountainous terrain as cost labor intensity currently available methods. We...
R angelands have garnered attention for their potential to store carbon (C) and been included in France's 4 per 1,000 initiative ([Minasny et al. 2017][1]), methods maintaining or increasing C grassland soils ([American Carbon Registry 2013][2]; [Verified Standard 2017][3]),
Abstract A coupled hydrologic and snowpack stable water isotope model assesses controls on isotopic inputs across a mountainous basin. Annually, the most depleted conditions occur in upper subalpine where snow accumulation is high, rainfall low. Snowmelt evolution over time indicates fractionation processes account for <25% snowmelt enrichment. Meltwater are largely determined by amount, phase mass of precipitation coincident with ablation period. Effect vapor loss from d‐excess balance...
Abstract. Soil organic carbon (SOC) is often retained more effectively in aspen-dominated forests compared to coniferous North America, yet the reasons why are unclear. A potential driver could be differences SOC protection mechanisms. Over decades centuries, chemical (e.g., mineral association) and physical aggregation) processes can work preserve stocks, which vary across cover types. To investigate this hypothesis, we evaluate controls on concentrations Coal Creek watershed (CO, USA), a...
ABSTRACT Hydrologic connectivity is defined as the connection among stores of water within a watershed and controls flux solutes from subsurface to stream. difficult quantify because it goverened by heterogeniety in storage permeability responds seasonal changes precipitation inputs moisture conditions. How interannual climate variability impacts hydrologic connectivity, thus stream flow generation chemistry, remains unclear. Using rare, four‐year synoptic chemistry dataset, we evaluated...
Changes in climate, season, and vegetation can alter organic export from watersheds. While an accepted tradeoff to protect public health, disinfection processes during drinking water treatment adversely react with compounds form byproducts (DBPs). By extension, DBP monitoring yield insights into hydrobiogeochemical dynamics within watersheds their implications for resource management. In this study, we analyzed temporal trends a facility that sources Coal Creek Crested Butte, Colorado. These...
Abstract Sulfur (S) is an essential macronutrient and important component of the earth’s crust, its cycling has critical impacts on trace metal mobility, water quality, human health. Pyrite weathering primary pathway by which sulfur enters surface waters. However, biogeochemical in soils river corridor mediates sulfate exports. In this study, we identified major forms across multiple compartments scales a pristine mountainous watershed, including shale bedrock profiles, hillslope soils,...
Shale bedrocks hold Earth's largest carbon inventory. Although water is recognized for cycling elements through terrestrial environments, understanding how hydrology controls ancient rock (Crock) release limited. Here we measured depth- and season-dependent subsurface fluxes pore-water pore-gas geochemistry (including radiocarbon) over five vastly different years along a hillslope. The data reveal that the maximum depth of annual table oscillations determines weathering depth. Seasonally...
Abstract Quantifying flow and transport from hillslopes is vital for understanding water quantity quality in rivers, but remains obscure because of limited subsurface measurements. Using measured hydraulic conductivity K profiles balance over a single year to calibrate transmissivity feedback model hillslope the East River watershed (Colorado) proved unsatisfactory predicting subsequent years. Well‐constrained field‐scale were obtained by optimizing flux predictions years having large...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Geophysical Research Letters. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Modeling Snow Dynamics Stable Water Isotopes Across Mountain LandscapesAuthorsRosemary W.H.CarrolliDJeffrey SDeemsiDMatthiasSprengeriDReed M.MaxwellWendy...
Abstract Mountainous watersheds are characterized by variability in functional traits, including vegetation, topography, geology, and geomorphology, which determine nitrogen (N) retention, release. Coal Creek East River two contrasting catchments within the Upper Colorado Basin that differ markedly total nitrate (NO 3 − ) export. The has a diverse vegetation cover, sinuous floodplains, is underlain N‐rich marine shale. At 0.21 ± 0.14 kg ha −1 yr , exports ∼3.5 times more NO relative to...