A5062031982- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Atmospheric and Environmental Gas Dynamics
- Pesticide and Herbicide Environmental Studies
- Cryospheric studies and observations
- Water Quality and Pollution Assessment
- Ethics in Clinical Research
- Hydrology and Sediment Transport Processes
- Interdisciplinary Research and Collaboration
- Pharmaceutical and Antibiotic Environmental Impacts
- Climate Change Communication and Perception
- Marine and coastal ecosystems
Pennsylvania State University
2021-2025
University of Zurich
2024
California Institute of Technology
2024
Abstract The shallow and deep hypothesis suggests that stream concentration‐discharge (CQ) relationships are shaped by distinct source waters from different depths. Under this hypothesis, baseflows typically dominated groundwater mostly reflect chemistry, whereas high flows soil water chemistry. Aspects of draw on applications like end member mixing analyses hydrograph separation, yet direct data support for the remains scarce. This work tests using co‐located measurements water,...
Abstract How does climate control river chemistry? Existing literature has examined extensively the response of chemistry to short‐term weather conditions from event seasonal scales. Patterns and drivers long‐term, baseline have remained poorly understood. Here we compile analyze data 506 minimally impacted rivers (412,801 points) in contiguous United States (CAMELS‐Chem) identify patterns chemistry. Despite distinct sources diverse reaction characteristics, a universal pattern emerges for...
Abstract The evasion of CO 2 from inland waters, a major carbon source to the atmosphere, depends on dissolved inorganic (DIC) concentrations. Our understanding DIC dynamics across gradients climate, geology, and vegetation conditions however have remained elusive. To understand its large‐scale patterns drivers, we collated instantaneous mean (multiyear average) concentrations about 100 rivers draining minimally‐impacted watersheds in contiguous United States. Within individual sites, ( C )...
The concurrent reduction in acid deposition and increase precipitation impact stream solute dynamics complex ways that make predictions of future water quality difficult. To understand how changes have influenced dissolved organic carbon (DOC) nitrogen (N) loading to streams, we investigated trends from 1991 2018 concentrations (DOC, ~3,800 measurements), (DON, ~1,160 inorganic N (DIN, ~2,130 measurements) a forested watershed Vermont, USA. Our analysis included concentration-discharge (C-Q)...
Abstract Dissolved organic and inorganic carbon (DOC DIC) influence water quality, ecosystem health, cycling. species are produced by biogeochemical reactions laterally exported to streams via distinct shallow deep subsurface flow paths. These processes arduous measure challenge the quantification of global cycles. Here we ask: when, where, how much is dissolved in from streams? We used a catchment‐scale reactive transport model, BioRT‐HBV, with hydrometeorology stream data illuminate...
ABSTRACT The importance of subsurface water dynamics, such as storage and flow partitioning, is well recognised. Yet, our understanding their drivers links to streamflow generation has remained elusive, especially in small headwater streams that are often data‐limited but crucial for downstream quantity quality. Large‐scale analyses have focused on characteristics across rivers with varying drainage areas, overlooking the dynamics shape behaviour. Here we ask question: What climate landscape...
Abstract. Watersheds are the fundamental Earth surface functioning units that connect land to aquatic systems. Many watershed-scale models represent hydrological processes but not biogeochemical reactive transport processes. This has limited our capability understand and predict solute export, water chemistry quality, system response changing climate anthropogenic conditions. Here we present a recently developed BioRT-Flux-PIHM (BioRT hereafter) v1.0, model. The model augments previously...
Abstract Understanding controls on solute export to streams is challenging because heterogeneous catchments can respond uniquely drivers of environmental change. To understand general patterns, we used a large‐scale inductive approach evaluate concentration–discharge (C–Q) metrics across spanning broad range catchment attributes and hydroclimatic drivers. We leveraged paired C–Q data for 11 solutes from CAMELS‐Chem, database built upon an existing dataset relatively undisturbed the...
Abstract Reactive Transport Models (RTMs) are essential tools for understanding and predicting intertwined ecohydrological biogeochemical processes on land in rivers. While traditional RTMs have focused primarily subsurface processes, recent watershed‐scale integrated interactions between surface subsurface. These emergent, often spatially explicit require extensive data, computational power, expertise. There is however a pressing need to create parsimonious models that minimal data...
Abstract Responding to the social and environmental challenges of Anthropocene requires that we integrate science across multiple perspectives, approaches, disciplines in equitable culturally responsive ways. While critical zone (CZ) has made large strides bridging natural, social, education disciplines, field been slower address lack diversity, especially terms “race” ethnicity. This means CZ do not fully reflect all communities they must serve, representation access careers therefore...
Understanding and predicting catchment responses to a regional disturbance is difficult because catchments are spatially heterogeneous systems that exhibit unique moderating characteristics. Changes in precipitation composition the Northeastern U.S. one prominent example, where reduction wet dry deposition hypothesized have caused increased dissolved organic carbon (DOC) export from many northern hemisphere forested catchments; however, findings different locations contradict each other....
Reactive Transport Models (RTMs) are essential for understanding and predicting intertwined ecohydrological biogeochemical processes on land in rivers. While traditional RTMs have focused primarily subsurface processes, recent integrate hydrological interactions between surface subsurface. These emergent, watershed-scale often spatially explicit require large amount of data extensive computational expertise. There is however a pressing need to create parsimonious models that less accessible...
Abstract Although the importance of dynamic water storage and flowpath partitioning on discharge behavior has been well recognized within critical zone community, there is still little consensus surrounding question, “ How do climate factors from above land characteristics below dictate storage, partitioning, ultimately regulate hydrological dynamics ?” Answers to this question have hindered by limited inconsistent spatio-temporal data arduous-to-measure subsurface data. Here we aim answer...