A5021812825- Environmental Toxicology and Ecotoxicology
- Heavy metals in environment
- Water Quality and Pollution Assessment
- Toxic Organic Pollutants Impact
- Hydrology and Watershed Management Studies
- Climate variability and models
- Flood Risk Assessment and Management
- Water-Energy-Food Nexus Studies
- Water resources management and optimization
- Mercury impact and mitigation studies
- Smart Grid Energy Management
- Power System Optimization and Stability
- Water Quality Monitoring and Analysis
- Smart Grid Security and Resilience
- Hydrology and Drought Analysis
- Energy and Environment Impacts
- Meteorological Phenomena and Simulations
- Fish Ecology and Management Studies
- Environmental Chemistry and Analysis
- Tropical and Extratropical Cyclones Research
- Water Systems and Optimization
- Environmental and Social Impact Assessments
- Aquatic Invertebrate Ecology and Behavior
- Urban Stormwater Management Solutions
- Soil erosion and sediment transport
University of the West Indies
2024-2025
Politecnico di Milano
2023-2024
University of California, Davis
2022
ORCID
2021
Chevron (United States)
2001-2020
Aquatic Systems (United States)
2008-2011
Stephen F. Austin State University
2011
Temple College
2011
Copper Development Association
2004-2008
ExxonMobil (United States)
2001
This study is the first of a two-part series presenting novel weather regime-based stochastic generator to support bottom-up climate vulnerability assessments water systems in California. In Part 1 this series, we present details model development and validation. The based on identification simulation regimes, or large-scale patterns atmospheric flow, which are then used condition local, daily at 6 km resolution across state. We conduct thorough validation baseline, 1000-year evaluate its...
ABSTRACT Infiltration and hydraulic conductivity ( K ) play a key role in streamflow generation groundwater recharge. The impact of agriculture on soil infiltration has been widely investigated. While many studies show decreases , others an increase or no change both parameters. These variations highlight the importance conducting local scale investigations. We investigated agricultural development land cover changes . Unsaturated unsat was measured at surface during dry wet seasons,...
Effective transboundary river management requires systematic, collaborative efforts among nations sharing a basin to ensure sustainable and equitable water resource allocation, support energy generation food security, mitigate environmental impacts, preserve the ecological integrity of systems. This study introduces novel framework for incorporating equity into systemwide optimization operations, explicitly addressing asymmetrical distribution supply risks riparian nations. Unlike...
The combined impacts of climate change, river basin management, planning and development on the components Water-Energy-Food-Environment (WEFE) nexus are different depending specific scale location where they assessed. This implies that a wide variety natural anthropogenic should be modelled together to obtain comprehensive picture inter-connections tradeoffs among WEFE components. main goal high-resolution modelling framework we will present is provide quantitative for evaluating indicators...
During the past three decades, significant advances have been made in understanding how environmental factors modify bioavailability and toxicity of metals such as copper aquatic environments. Several these led to development guidelines indirectly account for modifying factors, adjustment criteria on a site-specific basis, direct changes U.S. Environmental Protection Agency (U.S. EPA) freshwater quality criteria. To date, most this effort has focused systems, although similar exist marine...
Acute and chronic toxicity of copper (Cu) to a unionid mussel (Villosa iris) cladoceran (Ceriodaphnia dubia) were determined in water exposures at four concentrations dissolved organic carbon (DOC; nominally 0.5, 2.5, 5, 10 mg/L as [C]). Test waters with DOC 2.5 mg C/L prepared by mixing concentrate natural matter (Suwannee River, GA, USA) diluted well (hardness 100 CaCO(3) , pH 8.3, 0.5 C/L). median effect (EC50s) for Cu increased approximately fivefold (15-72 µg Cu/L) survival 4-d about...
Abstract A predominant concern following oil spills is toxicity to aquatic organisms. However, few data are available on effects in deep‐sea cold water fishes. The present study had 3 major objectives. first was investigate the relative sensitivity of species Anoplopoma fimbria (sablefish) acute aromatic compounds (toluene, 2‐methylnaphthalene, and phenanthrene), dispersant alone, chemically enhanced accommodated fractions (CEWAFs) Alaskan North Slope crude oil. second determine critical...
The evaluation of water systems based on historical statistics is problematic when shifts in the hydrologic system occur due to a changing climate. An explicit link thermodynamic and dynamic pathways climate that may control performance missing from current operational policies prescribed by regulation manuals within US. In response, this study contributes an extended version existing weather regime (WR)–based stochastic generator (SWG) allows (1) hourly simulation, (2) over entire year, (3)...
Abstract The threat that climate change poses to water resource systems has led a substantial and growing number of impact studies. These studies follow two approaches: (a) top‐down are driven by projections future provided downscaled general circulation models (GCMs); (b) bottom‐up the systematic evaluation exploratory scenarios. Top‐down approaches produce realistic scenarios rooted in simulation thermodynamic dynamic processes represented GCMs, but internal resolution these make it...
Abstract The copper sensitivity of four saltwater invertebrates (the mussel Mytilus galloprovincialis , the oyster Crassostrea virginica sand dollar Dendraster excentricus and sea urchin Strongylocentrotus purpuratus ) was determined experimentally using chronic‐estimator embryo‐larval test procedures. effect sample dissolved organic matter (DOM) content on Cu bioavailability for these species commonly prescribed Comparisons were made among results reported previously two other invertebrate...
Abstract A resurgence of dam planning and construction is under way in river basins where untapped hydropower potential could meet growing energy demands. Despite calls for more comprehensive evaluation projects, most dams continue to be planned with traditional methods that neglect interdependencies between management cumulative impacts multiple new dams. Using the transboundary Zambezi Watercourse as a case study competing demands water, energy, food are increasing, we contribute novel...
A model was recently published that relates the toxicity of copper to most sensitive taxa in U.S. Environmental Protection Agency's criteria database (Mytilus sp.) with dissolved organic carbon concentrations saltwater. This developed for potential use risk assessment and development site-specific (SSC) saltwater environments where Mytilus sp. is considered an appropriate indicator species. manuscript presents results a field validation study model. Effective concentration 50% (EC50) values...
Abstract The influence of dissolved organic carbon (DOC) and water composition on the toxicity copper to juvenile freshwater mussels (fatmucket, Lampsilis siliquoidea ) were evaluated in natural reconstituted waters. Acute 96‐h tests conducted at four nominal DOC concentrations (0, 2.5, 5, 10 mg/L as [C]) dilutions waters American Society for Testing Materials (ASTM) hard water. Toxicity also ASTM soft, moderately hard, very (nominal hardness 45–300 CaCO 3 ). Three surface (9.5–11 DOC)...
This study is the second of a two-part series presenting novel weather regime-based stochastic generator to support bottom-up climate vulnerability assessments water systems in California. In Part 2 this series, we present how model used develop an ensemble change scenarios based on both thermodynamic and dynamic signals change. The includes suite 30 scenarios, each consisting 1000 years simulated daily data (precipitation, maximum temperature, minimum temperature) at 6 km resolution across...
This study assesses potential changes in runoff of California’s eight major Central Valley water supply watersheds the 21st century. The employs latest operative climate projections from 10 general circulation models (GCMs) Coupled Model Intercomparison Project Phase 5 (CMIP5) under two emission scenarios (RCP 4.5 and RCP 8.5) to drive a hydrologic model (VIC) generating through 2099. Changes peak runoff, timing, seasonal (major season April–July) annual during future periods, mid-century...
Frequent and prolonged droughts challenge groundwater sustainability in California but managing aquifer recharge can help to partially offset overdraft. Here, we use managed (MAR) examine potential benefits of adding an artificial facility downstream from California’s Lower American River Basin, part prepare for drought. We a statewide hydroeconomic model, CALVIN, which integrates hydrology, the economics water scarcity cost operations, environmental flow requirements, other operational...