A5043884457- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Coastal and Marine Dynamics
- Soil and Water Nutrient Dynamics
- Coastal wetland ecosystem dynamics
- Groundwater and Isotope Geochemistry
- Ecology and biodiversity studies
- Water Quality and Resources Studies
- Peatlands and Wetlands Ecology
- Fish Ecology and Management Studies
- Freshwater macroinvertebrate diversity and ecology
- Risk Management in Financial Firms
- Water-Energy-Food Nexus Studies
- Transboundary Water Resource Management
- Marine and environmental studies
- Computational Physics and Python Applications
- Geology and Paleoclimatology Research
- Botany and Plant Ecology Studies
- Geological formations and processes
- Tropical and Extratropical Cyclones Research
- Integrated Water Resources Management
United States Geological Survey
2008-2023
Lower Mississippi-Gulf Water Science Center
2017-2022
Coastal wetland responses to sea-level rise are greatly influenced by biogeomorphic processes that affect surface elevation. Small changes in elevation relative sea level can lead comparatively large ecosystem structure, function, and stability. The table-marker horizon (SET-MH) approach is being used globally quantify the contributions of affecting change. Historically, SET-MH measurements have been obtained at local scales address site-specific research questions. However, face accelerated...
The 2011 flood in the Lower Mississippi resulted second highest recorded river flow diverted into Atchafalaya River Basin (ARB). higher water levels during peak high hydrologic connectivity between and floodplain, with up to 50% of moving off channel. Water quality samples were collected throughout ARB over course event. Significant nitrate (NO3−) reduction (75%) occurred within resulting a total NO3− 16.6% flood. floodplain was small but measurable source dissolved reactive phosphorus...
Abstract Recent studies suggest that about 2 Pg of organic C is stored on floodplains worldwide. The present study indicates the Atchafalaya River, fifth largest river in United States terms discharge, traps 30 mm/year sediment average within its floodplain, which highest nonepisodic rate fluvial deposition U.S. Coastal Plain. We installed sampling stations at 23 sites, normally transect, Basin; these sites represent range hydrogeomorphic conditions floodplain based hydrologic connectivity...
Kroes, Daniel E. and Cliff R. Hupp, 2010. The Effect of Channelization on Floodplain Sediment Deposition Subsidence Along the Pocomoke River, Maryland. Journal American Water Resources Association (JAWRA) 46(4): 686‐699. DOI: 10.1111/j.1752‐1688.2010.00440.x Abstract: nontidal River was intensively ditched channelized by mid‐1900s. In response to channelization; channel incision, head‐cut erosion, spoil bank perforation have occurred in this previously nonalluvial system. Six sites were...
ABSTRACT Dissolved oxygen (DO) concentrations in lowland streams are naturally lower than those upland streams; however, some regions where monitoring data lacking, DO criteria originally established for have been applied to streams. This study investigated the at which fish and invertebrate assemblages 35 sites located on southwestern Louisiana began demonstrate biological thresholds. Average threshold values taxa richness, diversity abundance metrics were 2.6 2.3 mg/L assemblages,...
We compared water-quality effects of 13 beaver ponds on adjacent free-flowing control reaches in the Coastal Plain rural North Carolina. measured concentrations nitrate, ammonium, soluble reactive phosphorus (SRP), and suspended sediment (SS) upstream downstream paired reaches. Nitrate SS decreased, ammonium increased, SRP were unaffected relative to The pond effect nitrate concentration was a reduction 112 ± 55 μg-N/L (19%) control-reach—influenced 28 17 μg-N/L. an increase 9.47 10.9 (59%)...
The effect of beaver ponds on sediment deposition is undocumented in the Piedmont and Coastal Plain Virginia North Carolina. We used 3 methods to examine sedimentation: 1) depth-integrated base-flow sampling, 2) repeat channel-surveys, 3) sediment-accumulation pads. During base flow, exported had little or no downstream suspended-sediment concentration. Most accumulated within channel until dam breaching. Ponds inundating floodplain trapped more sediment. varying configuration differently....
Dam construction and its impact on downstream fluvial processes may substantially alter ambient bank stability, floodplain inundation patterns, channel morphology. Most of the world's largest rivers have been dammed, which has prompted management efforts to mitigate dam effects. Three high dams (completed between 1953 1963) occur along Piedmont portion Roanoke River, North Carolina; just downstream, lower part river flows across largely unconsolidated Coastal Plain deposits. To document...
Abstract The Atchafalaya River Basin is the largest remaining forested wetland in contiguous United States. Since 1960, dredging and channel erosion have resulted changes to hydrologic connectivity that not been quantified. Analyses were conducted determine hydraulic geomorphic factors changed since discharge became controlled may decreased river/floodplain connectivity. We examined: (1) stage/discharge relationships from 1960 2014; (2) hydroperiods across floodplain; (3) distribution...
Abstract Little is known about water movement, volume, or residence time (RT), and how those characteristics affect sediment trapping efficiency (TE) dissolved oxygen concentrations (DO) in the United States' largest remaining bottomland hardwood swamp, Atchafalaya River Basin. To better understand these dynamics, this study used bathymetry, lidar, stage records to determine volumes Basin's hydrologically distinct management units (WMUs). Discharge measurements determined flow distribution...