Jessica Hopple
Biography
Jessica began her career with the USGS at the Stable Isotope Laboratory in Reston, Virginia where she developed new techniques to analyze gas, rock and water samples for stable isotopes. She later joined the Organic Degradation Project and was involved in studies on the fate and transport of organic contaminants in subsurface environments in Florida, Minnesota, and New Jersey. In 1995 she transferred to the New Jersey Water Science Center to work on the Long Island/New Jersey NAWQA project. Jessica has directed several projects dealing with drinking water quality. In particular she has assessed the susceptibility of public supply wells and surface water intakes to contamination, studied the types of organic compounds that contribute to the formation of disinfection byproducts in public drinking water systems, and related the quality of source water and finished drinking water to the natural and man-made processes that can affect the quality of water. Jessica is currently the database manager on the NAWQA Integrated Watershed Studies project. Jessica is proficient in compiling large datasets from different sources into comprehensive Microsoft Access databases and in verification, management, documentation, and dissemination of complex environmental information.
Science and Products
Hydrograph-separation results for 225 streams in the Chesapeake Bay watershed derived by using PART, HYSEP (Fixed, Local minimum, Slide), BFI, and a Recursive Digital Filter with streamflow data ranging from 1913 through 2016
This U.S. Geological Survey (USGS) data release contains daily-mean streamflow and estimated-daily base flow for 225 streamgages in the Chesapeake Bay watershed ranging from 1913 to 2016 (beginning and end dates may vary). There is a table containing hydrograph-separation results by six methods for 225 sites (Hydrograph_separation_results_for_225_streams_in_the_Chesapeake_Bay_watershed%
Source and model output layers used for the prediction and display of the probability of elevated concentrations of redox-sensitive constituents in groundwater in the Fox-Wolf-Peshtigo watershed in Wisconsin and Michigan
This USGS data release contains 1-kilometer resolution source-layer rasters used to predict redox conditions and contaminant concentrations in groundwater in the Fox-Wolf-Peshtigo watershed in Wisconsin and Michigan using random forest classification. The model output layers are 1-kilometer resolution rasters of the predicted probability of elevated concentrations of nitrate, iron, and arseni...
Real and synthetic data used to test the Two-tracer Ratio-based Mixing Model (TRaMM)
This USGS Data Release represents the synthetic and real data from hydrologically diverse streams used to test the performance and limitations of the Two-tracer Ratio-based Mixing Model (TRaMM) which uses high-frequency measures of two tracers (A and B) and streamflow to separate total streamflow into water from slowflow and fastflow sources.
Data on annual total nitrogen loads and watershed characteristics used to develop a method to estimate the total nitrogen loads in small streams
This USGS Data Release represents the data used to develop multiple linear regression models for estimating the loads of total nitrogen in small streams. Recursive partitioning and random forest regression were used to assess 85 geospatial, environmental, and watershed variables across 636 small (less than 585 square kilometers) watersheds to determine which variables are fundamentally im
Occurrence of nitrate, pesticides, and volatile organic compounds in the Kirkwood-Cohansey aquifer system, southern New Jersey
Water samples were collected from a network of 72 shallow monitoring wells to assess the chemical quality of recently recharged ground water in the surficial Kirkwood- Cohansey aquifer system of southern New Jersey. The wells are randomly distributed among agricultural, urban, and undeveloped areas to provide data representative of chemical...
Stackelberg, Paul E.; Hopple, Jessica A.; Kauffman, Leon J.
US Geological Survey Toxic Substances Hydrology Program: Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993
No abstract available.
Morganwalp, D.W.; Aronson, D.A.
Hydrophobic organochlorine compounds sequestered in submersed aquatic macrophytes (Hydrilla yerticillata (L.f.) Royle) from the tidal Potomac River (USA)
The potential for hydrophobic organochlorine contaminants to be sequestered in submersed aquatic vegetation was evaluated by determining the concentrations of cis- and trans-chlordane, dieldrin, and polychlorinated biphenyls (PCBs) in feral aquatic macrophytes (Hydrilla verticillata (L.f.) Royle) collected from the tidal Potomac...
Hopple, Jessica A.; Foster, G.D. Audit of VSMOW distributed by the United States National Institute of Standards and Technology
Bright-orange floating matter (possibly algae) has been observed in the United States supply of some ampoules and in one of two 10-L primary glass storage flasks of the isotopic reference water VSMOW (Vienna Standard Mean Ocean Water). Within experimental error, ampoules with and without this orange matter are identical in stable...
Hopple, Jessica A.; Foster, Graham D. Alternative tissue analysis method developed for organochlorine contaminants in aquatic organisms
The exposure of aquatic life to organochlorine contaminants has been investigated during the past two decades because of human and ecosystem health concerns related to the bioaccumulation of hazardous, lipophilic substances. The toxic effects of polychlorodibenzo-12-dioxins and polychlorinated biphenyls (PCBs) are well known,...
Shan, T. H.; Hopple, Jessica A.; Foster, Graham D.
U.S .Geological Survey toxic substance hydrology program: Proceedings of the technical meeting, Monterey, California, March 11-15, 1991
No abstract available.
Mallard, G.E.; Aronson, D.A.
U.S. Geological survey program on toxic waste--ground-water contamination; proceedings of the Second technical meeting, Cape Cod, Massachusetts, October 21-25, 1985
This study characterizes the clay minerals in sediments associated with a plume of creosote-contaminated groundwater. The plume of contaminated groundwater near Pensacola, FL, is in shallow, permeable, Miocene to Holocene quartz sand and flows southward toward Pensacola Bay. Clay-size fractions were separated from 41 cores, chiefly split-spoon...
Ragone, S.E. Comparison of stable isotope reference samples
Use of light stable isotope ratio measurements has proliferated in the past decade. The need for procuring additional stable isotope reference materials was recognized at an International Atomic Energy Agency (IAEA) consultants' meeting convened in 19761. This group recommended acquisition of two carbonates, two carbon dioxide samples, a biotite,...
Coplen, Tyler B.; Kendall, Carol; Hopple, Jessica A.