A5015779900- Hydrology and Sediment Transport Processes
- Geological formations and processes
- Hydrology and Watershed Management Studies
- Geology and Paleoclimatology Research
- Flood Risk Assessment and Management
- Soil and Water Nutrient Dynamics
- Fish Ecology and Management Studies
- Hydraulic flow and structures
- Landslides and related hazards
- Soil erosion and sediment transport
- Computer Graphics and Visualization Techniques
- Fluid Dynamics and Vibration Analysis
- Geological Modeling and Analysis
- Geological Studies and Exploration
- Underwater Acoustics Research
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Remote Sensing and LiDAR Applications
- Hydrology and Drought Analysis
- Meteorological Phenomena and Simulations
- Marine Biology and Ecology Research
- Plant Water Relations and Carbon Dynamics
- Enhanced Oil Recovery Techniques
- Distributed and Parallel Computing Systems
Indiana University Bloomington
2022-2024
University of California, Riverside
2024
Rice University
2018-2021
Saint Anthony College of Nursing
2021
University of Minnesota
2021
University of North Carolina at Chapel Hill
2017-2019
The morphology and abundance of streams control the rates hydraulic biogeochemical exchange between streams, groundwater, atmosphere. In large river systems, relationship width is fractal, such that narrow rivers are proportionally more common than wider rivers. However, in headwater where many reactions most rapid, stream unknown. To constrain this uncertainty, we surveyed hydromorphology (wetted length) several networks across North America New Zealand. Here, find a strikingly consistent...
Abstract The Paleocene-Eocene thermal maximum (PETM) was the most extreme example of an abrupt global warming event in Cenozoic, and it is widely discussed as a past analog for contemporary climate change. Anomalous accumulation terrigenous mud marginal shelf environments concentration sand terrestrial deposits during PETM have both been inferred to represent increase fluvial sediment flux. A corresponding water discharge or river slope would required transport this additional sediment....
Abstract An appealing strategy for reconstructing the timing and tempo of paleoenvironmental change from sedimentary strata is to linearly interpolate between marker beds known age. This method requires significant assumptions, but more advanced age modeling methods are usually not feasible. We used experiments explore how changes in processes invalidate these assumptions affect estimates time strata. When changed favor widespread deposition, we found that measuring systematically...
As rivers sculpt their valleys and floodplains, they transport sediments – primarily quartz feldspar from source regions to the sea. These complex sediment-transport processes, difficult study even over short time scales, can eventually build systems of river terraces, which in turn record impacts past climate on Earth-surface systems. To both landform-building we focus deglacial fluvial stored upper Mississippi valley.We collected terrace sediment samples for luminescence dating...
Abstract Overbank flooding is common along most rivers, and it influences the dispersal of sediment to floodplains. While variable discharge a critical aspect fluvial landscape evolution, typically modeled by simplifying hydrograph an equivalent steady discharge: channel‐forming discharge. However, for all formulations used simplify hydrographs, many different inputs can produce same Here, we investigate how hydrographs with flood intensities affect channel mobility, accumulation patterns,...
Abstract Headwater stream networks expand and contract in response to event‐driven seasonal catchment wetness conditions. This dynamic behavior drives variability the width, length, surface area of streams, important parameters for constraining a range ecological biogeochemical processes, such as atmospheric gas exchange. While longitudinal expansion contraction streams has been studied some time, widths remains poorly understood. Recent studies have found that at average baseflow conditions...
Abstract Dune-scale cross-beds are a fundamental building block of fluvial-deltaic stratigraphy and have been recognized on Earth other terrestrial planets. The architecture these stratal elements reflects bed-form dynamics that dependent river hydrodynamic conditions, previous work has documented multitude scaling relationships to describe the morphodynamic interactions between dunes fluid flow. However, predicated normal flow conditions for systems thus may be unsuitable application in...
River deltas provide many societal benefits, and sustainability of these landforms may be impacted by human modification global climate change.Reduced-complexity numerical delta models incorporate limited physical processes, allowing researchers to assess the spatiotemporal evolution landscape response individual processes environmental forcings.Isolating is useful understand, for example, shifting morphology due sea-level rise, changing vegetal cover, or flooding intensity.As a result, have...
Fluvial-deltaic systems are subject to non-uniform backwater flow where rivers approach receiving basins. This hydrodynamic condition results in sediment aggradation on the channel bed and enhanced downstream fining. In turn, this impacts river dynamics, including lateral migration rates propensity for avulsion. The imprint of stratigraphy has been reported from field, numerical modeling, experimental studies. work provides key observations evaluating impact spanning length scales those...
<title>Abstract</title> Avulsing rivers carve new pathways on the floodplain, and associated flooding can profoundly impact society <sup>1-4</sup>. River avulsions are thought to occur when water column becomes perched above floodplain<sup>5</sup>, or slope down channel's flanks provides a steeper descent than current path <sup>6,7</sup>. However, neither idea has been suitably field-tested. Here we quantify topography around avulsing reveal that these mechanisms work together. Near coasts,...
Preliminary observations of three trains dune-like landforms, just south the shore Lake Superior, near Christmas, MI, USA, reveal presence large and imbricated boulder clasts on their surface 20&#8211;33 m deep bedrock canyons in close proximity. These characteristics suggest an ambiguous episode high-magnitude discharge across this landscape before modern physical geography Superior basin was established. Understanding formation these landforms is important reconstructing regional...