A5060283236- Soil and Water Nutrient Dynamics
- Aquatic Ecosystems and Phytoplankton Dynamics
- Hydrology and Watershed Management Studies
- Fish Ecology and Management Studies
- Groundwater flow and contamination studies
- Water Quality and Pollution Assessment
- Aquatic Invertebrate Ecology and Behavior
- Water resources management and optimization
- Flood Risk Assessment and Management
- Hydrological Forecasting Using AI
- Groundwater and Isotope Geochemistry
- Numerical methods for differential equations
- Engineering and Technology Innovations
- Matrix Theory and Algorithms
- Marine and coastal ecosystems
- Water Treatment and Disinfection
- Urban Stormwater Management Solutions
- Advanced Numerical Methods in Computational Mathematics
- Water Quality Monitoring Technologies
- Wastewater Treatment and Nitrogen Removal
- Water Quality and Resources Studies
- Toxic Organic Pollutants Impact
- Environmental Monitoring and Data Management
- Aquatic and Environmental Studies
- Mine drainage and remediation techniques
Tufts University
2014-2023
Virginia Commonwealth University
2020
ORCID
2020
National Institute of Water and Atmospheric Research
2000-2005
GlaxoSmithKline (United States)
2003
Merck & Co., Inc., Rahway, NJ, USA (United States)
2003
Bristol-Myers Squibb (United States)
2003
American Society of Civil Engineers
1999-2000
Imperial College London
1999-2000
University of Colorado Boulder
1991-1999
Abstract The accelerated eutrophication of most freshwaters is limited by P inputs. Nonpoint sources in agricultural runoff now contribute a greater portion freshwater inputs, due to easier identification and recent control point sources. Although management an integral part profitable agrisystems, continued inputs fertilizer manure excess crop requirements have led build‐up soil levels, which are environmental rather than agronomic concern, particularly areas intensive livestock production....
Cyanobacterial harmful algal blooms (CyanoHABs) have serious adverse effects on human and environmental health. Herein, we developed a modeling framework that predicts the effect of climate change cyanobacteria concentrations in large reservoirs contiguous U.S. The framework, which uses projections from five global circulation models, two greenhouse gas emission scenarios, cyanobacterial growth is unique coupling with hydrologic/water quality network model United States. Thus, it generates...
Based primarily on data collected over the past four decades by Environment Canada, long-term trends of eutrophication-related variables are developed for offshore waters Laurentian Great Lakes. Trends spring concentration reported major nutrient species: phosphorus [total (TP), and soluble reactive (SRP)]; nitrogen oxidized (NO3 + NO2), ammonia (NH3)]; silica [soluble (SiO2)]. Summer surface chlorophyll a Secchi depth as indicators lake trophic response. The results show that has declined...
The PhATE (Pharmaceutical Assessment and Transport Evaluation) model presented in this paper was developed as a tool to estimate concentrations of active pharmaceutical ingredients (APIs) U.S. surface waters that result from patient use (or consumption) medicines. uses mass balance approach predicted environmental (PECs) 11 watersheds selected be representative most hydrologic regions the United States. divides rivers into discrete segments. It estimates API enters segment upstream or...
A simple approach, the delta method, is derived to estimate stream reaeration, primary production, and respiration rates on basis of diurnal dissolved oxygen measurements. The method uses three features curve determine these quantities. time minimum deficit (relative solar noon) used reaeration rate. Given rate, range Δ employed predict photosynthetic production. Finally, average can be in conjunction with production compute respiration. graphical procedure presented implement method....
A passive method for remote sensing of the nuisance green algae Cladophora glomerata in rivers is presented using an unmanned aerial vehicle (UAV). Included are methods UAV operation, lens distortion correction, image georeferencing, and spectral analysis to support algal cover mapping. Eighteen photography missions were conducted over summer 2013 off-the-shelf three-band, wide-angle, red, green, blue (RGB) digital camera sensor. Images post-processed, mosaicked, georeferenced so automated...
For rivers and streams, the impact of rising water temperature on biochemical oxygen demand (BOD) assimilative capacity depends interplay two independent factors: waterbody’s dissolved (DO) saturation its self-purification rate (i.e., balance between BOD oxidation reaeration). Although both processes increase with temperatures, depletion due to increases faster than reaeration. The net result is that temperatures will decrease ability world’s natural waters assimilate oxygen-demanding wastes...
A model based on conservation of mass is developed to simulate total phosphorus budgets for the Great Lakes. Phosphorus loadings are generated from variables indicative human development, such as population and land use. The input a budget that can be solved concentration function time. historical simulation census information period 1800 1970 compares favorably with present measurements. profiles indicate dramatic increase in impact Lakes Erie, Ontario, Michigan 1950 due point sources....
This paper presents the multiobjective calibration results for temperature and solute from a two‐zone (TZTS) model which separates transient storage into surface (STS) subsurface (HTS) components. contains terms associated with heat fluxes in main channel (MC) STS, mass exchange between STS MC, HTS due to bed deeper ground conduction. To estimate additional parameters multiple‐zone model, data collection effort was conducted provide time series tracer curves representing movement of and/or...