Search Results - "Barbash, Jack E."

Occurrence of Pesticides in Shallow Groundwater of the United States:  Initial Results from the National Water-Quality Assessment Program by Kolpin, Dana W, Barbash, Jack E, Gilliom, Robert J

“…The first phase of intensive data collection for the National Water-Quality Assessment (NAWQA) was completed during 1993−1995 in 20 major hydrologic basins of…”
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Linking ground-water age and chemistry data along flow paths: Implications for trends and transformations of nitrate and pesticides by Tesoriero, Anthony J., Saad, David A., Burow, Karen R., Frick, Elizabeth A., Puckett, Larry J., Barbash, Jack E.

“…Tracer-based ground-water ages, along with the concentrations of pesticides, nitrogen species, and other redox-active constituents, were used to evaluate the…”
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National, Holistic, Watershed-Scale Approach to Understand the Sources, Transport, and Fate of Agricultural Chemicals by Capel, P.D, McCarthy, K.A, Barbash, J.E

“…This paper is an introduction to the following series of papers that report on in-depth investigations that have been conducted at five agricultural study…”
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Regression Models for Estimating Concentrations of Atrazine plus Deethylatrazine in Shallow Groundwater in Agricultural Areas of the United States by Stackelberg, Paul E., Barbash, Jack E., Gilliom, Robert J., Stone, Wesley W., Wolock, David M.

“…Tobit regression models were developed to predict the summed concentration of atrazine [6‐chloro‐N‐ethyl‐N’‐(1‐methylethyl)‐1,3,5‐triazine‐2,4‐diamine] and its…”
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Data worth and prediction uncertainty for pesticide transport and fate models in Nebraska and Maryland, United States by Nolan, Bernard T, Malone, Robert W, Doherty, John E, Barbash, Jack E, Ma, Liwang, Shaner, Dale L

“…BACKGROUND: Complex environmental models are frequently extrapolated to overcome data limitations in space and time, but quantifying data worth to such models…”
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Occurrence and Fate of Pesticides in Four Contrasting Agricultural Settings in the United States by Steele, G.V, Johnson, H.M, Sandstrom, M.W, Capel, P.D, Barbash, J.E

“…Occurrence and fate of 45 pesticides and 40 pesticide degradates were investigated in four contrasting agricultural settings--in Maryland, Nebraska,…”
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Major Herbicides in Ground Water: Results from the National Water‐Quality Assessment by Barbash, Jack E., Thelin, Gail P., Kolpin, Dana W., Gilliom, Robert J.

“…ABSTRACT To improve understanding of the factors affecting pesticide occurrence in ground water, patterns of detection were examined for selected herbicides,…”
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Pesticide Fate and Transport throughout Unsaturated Zones in Five Agricultural Settings, USA by Hancock, T.C, Sandstrom, M.W, Vogel, J.R, Webb, R.M.T, Bayless, E.R, Barbash, J.E

“…Pesticide transport through the unsaturated zone is a function of chemical and soil characteristics, application, and water recharge rate. The fate and…”
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Simulated Fate and Transport of Metolachlor in the Unsaturated Zone, Maryland, USA by Bayless, E.R, Capel, P.D, Barbash, J.E, Webb, R.M.T, Hancock, T.L.C, Lampe, D.C

“…An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site…”
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Variations in Pesticide Leaching Related to Land Use, Pesticide Properties, and Unsaturated Zone Thickness by Webb, R.M.T, Wieczorek, M.E, Nolan, B.T, Hancock, T.C, Sandstrom, M.W, Barbash, J.E, Bayless, E.R, Healy, R.W, Linard, J

“…Pesticide leaching through variably thick soils beneath agricultural fields in Morgan Creek, Maryland was simulated for water years 1995 to 2004 using LEACHM…”
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Testing water quality for pesticide pollution by GILLIOM, R. J, BARBASH, J. E, KOLPIN, D. W, LARSON, S. J

“…A U.S. Geological Survey study reveals widespread contamination of the nation's water resources. Robert J. Gilliom, Jack E. Barbash, Dana W. Kolpin, and Steven…”
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Pesticides in Ground Water of the United States, 1992-1996 by Kolpin, Dana W., Barbash, Jack E., Gilliom, Robert J.

“…During the first cycle of the National Water Quality Assessment (1992–1996), ground water in 20 of the nation's major hydro‐logic basins was analyzed for 90…”
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Atrazine and metolachlor occurrence in shallow ground water of the United States, 1993 to 1995: Relations to explanatory factors by KOLPIN, Dana W, BARBASH, Jack E, GILLIOM, Robert J

“…Since 1991, the U.S. Geological Survey has been conducting the National Water Quality Assessment (NAWQA) Program to determine the quality of the Nation's water…”
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Abiotic dehalogenation of 1,2-dichloroethane and 1,2-dibromoethane in aqueous solution containing hydrogen sulfide by Barbash, Jack E, Reinhard, Martin

“…To obtain information on the fate of chlorinated aliphatic compounds in oxygen-deficient natural waters, the dehalogenation of 1,2-dichloroethane and…”
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Comment on "Homogeneous Hydrolysis Rate Constants for Selected Chlorinated Methanes, Ethanes, Ethenes, and Propanes" by Barbash, Jack E, Reinhard, Martin

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Pesticide Fate and Transport throughout Unsaturated Zones in Five Agricultural Settings, US by Hancock, Tracy C, Sandstrom, Mark W, Vogel, Jason R, Webb, Richard MT, Bayless, ERandall, Barbash, Jack E

“…Pesticide transport through the unsaturated zone is a function of chemical and soil characteristics, application, and water recharge rate. The fate and…”
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Simulated Fate and Transport of Metolachlor in the Unsaturated Zone, Maryland, US by Bayless, ERandall, Capel, Paul D, Barbash, Jack E, Webb, Richard MT, Hancock, Tracy LConnell, Lampe, David C

“…An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site…”
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ATRAZINE AND METOLACHLOR OCCURRENCE IN SHALLOW GROUND WATER OF THE UNITED STATES, 1993 TO 1995: RELATIONS TO EXPLANATORY FACTORS1 by Kolpin, Dana W., Barbash, Jack E., Gilliom, Robert J.

“…Since 1991, the U.S. Geological Survey has been conducting the National Water Quality Assessment (NAWQA) Program to determine the quality of the Nation's water…”
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ATRAZINE AND METOLACHLOR OCCURRENCE IN SHALLOW GROUND WATER OF THE UNITED STATES, 1993 TO 1995: RELATIONS TO EXPLANATORY FACTORS 1 by Kolpin, Dana W., Barbash, Jack E., Gilliom, Robert J.

“…Since 1991, the U.S. Geological Survey has been conducting the National Water Quality Assessment (NAWQA) Program to determine the quality of the Nation's water…”
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Atrazine and metholachlor occurrence in shallow ground water of the United States, 1993- to 1195: Relations to explanatory factors by Kolpin, Dana W, Barbash, Jack E, Gilliom, Robert J

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