Search Results - "Robbins, Gary"

Nonpoint source arsenic contamination of soil and groundwater from legacy pesticides by Higgins, Mark A., Metcalf, Meredith J., Robbins, Gary A.

“…Arsenic (As) contamination in wells is common throughout the northeastern United States. It is well documented that lead‐arsenate (PbHAsO4) pesticides were…”
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Analytical Solutions of Three‐Dimensional Contaminant Transport Models with Exponential Source Decay by Paladino, Ombretta, Moranda, Arianna, Massabò, Marco, Robbins, Gary A.

“…Despite the availability of numerical models, interest in analytical solutions of multidimensional advection‐dispersion systems remains high. Such models are…”
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Use of bacteria community analysis to distinguish groundwater recharge sources to shallow wells by Higgins, Mark A., Robbins, Gary A., Maas, Kendra R., Binkhorst, Gordon K.

“…In this study, bacteria community analysis was performed to supplement a preexisting evaluation of nitrate contamination in drinking water wells at a coastal…”
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Stakeholder Participation in High‐Resolution Monitoring of Salt Contamination by Metcalf, Meredith J., Higgins, Mark A., Robbins, Gary A.

“…Groundwater contamination of bedrock domestic wells by road salt is an ever‐increasing problem in the Northeast United States. Given the many factors that…”
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An assessment of hydrologic factors that influence contaminant concentrations determined from domestic well-water samples by Higgins, Mark A., Robbins, Gary A., Metcalf, Meredith J.

“…Open borehole wells in fractured crystalline rock are commonly used for domestic water supply. Concentrations of contaminants present in the well water,…”
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Mobilization of Radium and Radon by Deicing Salt Contamination of Groundwater by McNaboe, Lukas A., Robbins, Gary A., Dietz, Michael E.

“…Elevated radium (Ra) concentrations have been observed in aquifers with high naturally occurring salinity. The flux of radon (Rn) gas from the decay of Ra out…”
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Impacts of Road Salting on Water Quality in Fractured Crystalline Bedrock by Vitale, Sarah A., Robbins, Gary A., McNaboe, Lukas A.

“…Many rural communities depend on bedrock wells as a primary water source, which raises the issue as to whether increasing amounts of salt application are…”
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Effects of Road Salt on Connecticut's Groundwater: A Statewide Centennial Perspective by Cassanelli, James P., Robbins, Gary A.

“…This study examined the extent to which development and road salting has affected Connecticut's groundwater. We gathered water quality data from different time…”
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Application of first order kinetics to characterize MTBE natural attenuation in groundwater by Metcalf, Meredith J., Stevens, Graham J., Robbins, Gary A.

“…Methyl tertiary butyl ether (MTBE) was a gasoline oxygenate that became widely used in reformulated gasoline as a means to reduce air pollution in the 1990s…”
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A Single Packer Method for Characterizing Water Contributing Fractures in Crystalline Bedrock Wells by Flahive, Neil A., Robbins, Gary A.

“…Water levels and water quality of open borehole wells in fractured bedrock are flow‐weighted averages that are a function of the hydraulic heads and…”
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Measuring water quality from individual fractures in open wellbores using hydraulic isolation and the dissolved oxygen alteration method by Vitale, Sarah A., Robbins, Gary A.

“…This study describes a low-cost method for sampling individual fractures in open wellbores in crystalline bedrock utilizing naturally occurring flow conditions…”
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Measuring Flow Rate in Crystalline Bedrock Wells Using the Dissolved Oxygen Alteration Method by Vitale, Sarah A., Robbins, Gary A.

“…Determination of vertical flow rates in a fractured bedrock well can aid in planning and implementing hydraulic tests, water quality sampling, and improving…”
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Permeable Asphalt: A New Tool to Reduce Road Salt Contamination of Groundwater in Urban Areas by Dietz, Michael E., Angel, Derek R., Robbins, Gary A., McNaboe, Lukas A.

“…Chloride contamination of groundwater in urban areas due to deicing is a well‐documented phenomenon in northern climates. The objective of this study was to…”
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Road salt inputs alter biogeochemistry but not plant community composition in exurban forested wetlands by Walker, Samantha E., Robbins, Gary, Helton, Ashley M., Lawrence, Beth A.

“…Forested wetlands of the temperate north are increasingly exposed to deicing salts, but it is unclear how this may alter wetland biogeochemistry and plant…”
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Characterizing Groundwater Flow in Monitoring Wells by Altering Dissolved Oxygen by Vitale, Sarah A., Robbins, Gary A.

“…In this study, the dissolved oxygen (DO) alteration method (Chlebica and Robbins 2013) is used to evaluate the patterns of flow into and vertically within…”
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Unsteady State Tracer Method for Characterizing Fractures in Bedrock Wells by Libby, Jill L, Robbins, Gary A

“…Evaluating contaminants impacting wells in fractured crystalline rock requires knowledge of the individual fractures contributing water. This typically…”
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Using Domestic Well Records to Determine Fractured Bedrock Watersheds and Recharge Rates by Metcalf, Meredith J, Robbins, Gary A

“…This study presents an approach for delineating groundwater basins and estimating rates of recharge to fractured crystalline bedrock. It entailed the use of…”
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Altering Dissolved Oxygen to Determine Flow Conditions in Fractured Bedrock Wells by Chlebica, Dariusz W., Robbins, Gary A.

“…A new approach to locate transmissive fractures and decipher vertical borehole flow conditions in fractured crystalline bedrock wells is presented, which uses…”
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Methods for simulating solute breakthrough curves in pumping groundwater wells by Jeffrey Starn, J., Bagtzoglou, Amvrossios C., Robbins, Gary A.

“…In modeling there is always a trade-off between execution time and accuracy. For gradient-based parameter estimation methods, where a simulation model is run…”
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Uncertainty in simulated groundwater-quality trends in transient flow by Starn, J. Jeffrey, Bagtzoglou, Amvrossios C., Robbins, Gary A.

“…In numerical modeling of groundwater flow, the result of a given solution method is affected by the way in which transient flow conditions and geologic…”
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