Gary Wall
Gary Wall is the Associate Director for Science in the USGS New York Water Science Center (NYWSC).
Gary oversees NYWSC science activities in Upstate New York.
Professional Experience
Associate Director for Science in the USGS New York Water Science Center in Troy.
Education and Certifications
1995 – Ph.D. Geology, Rensselaer Polytechnic Institute
1990 – M.S. Geology, Rensselaer Polytechnic Institute
1989 – B.S. Geological Studies/Natural Science, Providence College.
Science and Products
Filter Total Items: 17
Surrogate analysis and index developer (SAID) tool and real-time data dissemination utilities
The use of acoustic and other parameters as surrogates for suspended-sediment concentrations (SSC) in rivers has been successful in multiple applications across the Nation. Critical to advancing the operational use of surrogates are tools to process and evaluate the data along with the subsequent development of regression models from which real-time sediment concentrations can be made available to
Authors
Marian M. Domanski, Timothy D. Straub, Molly S. Wood, Mark N. Landers, Gary R. Wall, Steven J. Brady
Maximum known stages and discharges of New York streams and their annual exceedance probabilities through September 2011
Maximum known stages and discharges at 1,400 sites on 796 streams within New York are tabulated. Stage data are reported in feet. Discharges are reported as cubic feet per second and in cubic feet per second per square mile. Drainage areas range from 0.03 to 298,800 square miles; excluding the three sites with larger drainage areas on the St. Lawrence and Niagara Rivers, which drain the Great Lake
Authors
Gary R. Wall, Patricia M. Murray, Richard Lumia, Thomas P. Suro
Sediment transport due to extreme events: The Hudson River estuary after tropical storms Irene and Lee
Tropical Storms Irene and Lee in 2011 produced intense precipitation and flooding in the U.S. Northeast,
including the Hudson River watershed. Sediment input to the Hudson River was approximately 2.7 megaton, about
5 times the long-term annual average. Rather than the common assumption that sediment is predominantly trapped
in the estuary, observations and model results indicate that approximat
Authors
David K. Ralston, John C. Warner, W. Rockwell Geyer, Gary R. Wall
Combined sewer overflows: an environmental source of hormones and wastewater micropollutants
Data were collected at a wastewater treatment plant (WWTP) in Burlington, Vermont, USA, (serving 30,000 people) to assess the relative contribution of CSO (combined sewer overflow) bypass flows and treated wastewater effluent to the load of steroid hormones and other wastewater micropollutants (WMPs) from a WWTP to a lake. Flow-weighted composite samples were collected over a 13 month period at th
Authors
P. J. Phillips, A.T. Chalmers, J.L. Gray, D.W. Kolpin, W.T. Foreman, G. R. Wall
Suspended sediment transport in the freshwater reach of the Hudson river estuary in eastern New York
Deposition of Hudson River sediment into New York Harbor interferes with navigation lanes and requires continuous dredging. Sediment dynamics at the Hudson estuary turbidity maximum (ETM) have received considerable study, but delivery of sediment to the ETM through the freshwater reach of the estuary has received relatively little attention and few direct measurements. An acoustic Doppler current
Authors
G. R. Wall, E.A. Nystrom, S. Litten
Use of an ADCP to compute suspended-sediment discharge in the tidal Hudson River, New York
Acoustic Doppler current profilers (ADCPs) can provide data needed for computation of suspended-sediment discharge in complex river systems, such as tidal rivers, in which conventional methods of collecting time-series data on suspended-sediment concentration (SSC) and water discharge are not feasible. Although ADCPs are not designed to measure SSC, ADCP data can be used as a surrogate under certa
Authors
Gary R. Wall, Elizabeth A. Nystrom, Simon Litten
Calculating mercury loading to the tidal Hudson River, New York, using rating curve and surrogate methodologies
Total mercury (THg) load in rivers is often calculated from a site-specific "rating-curve" based on the relation between THg concentration and river discharge along with a continuous record of river discharge. However, there is no physical explanation as to why river discharge should consistently predict THg or any other suspended analyte. THg loads calculated by the rating-curve method were compa
Authors
G. R. Wall, H. H. Ingleston, S. Litten
Proceedings of the Federal Interagency Workshop on Turbidity and other Sediment Surrogates, April 30-May 2, 2002, Reno, Nevada
No abstract available.
Authors
John R. Gray, G. Douglas Glysson
Regional patterns of pesticide concentrations in surface waters of New York in 1997
The predominant mixtures of pesticides found in New York surface waters consist of five principal components. First, herbicides commonly used on corn (atrazine, metolachlor, alachlor, cyanazine) and a herbicide degradate (deethylatrazine) were positively correlated to a corn-herbicide component, and watersheds with the highest corn-herbicide component scores were those in which large amounts of ro
Authors
Patrick J. Phillips, David A. Eckhardt, Douglas A. Freehafer, Gary R. Wall, H. H. Ingleston
Metolachlor and its metabolites in tile drain and stream runoff in the canajoharie creek watershed
Water samples collected during April−November 1997 from tile drains beneath cultivated fields in central New York indicate that two metabolites of the herbicide metolachlormetolachlor ESA (ethanesulfonic acid) and OA (oxanilic acid)can persist in agricultural soils for 4 or more years after application and that fine-grained soils favor the transport of metolachlor ESA over metolachlor and metolach
Authors
P. J. Phillips, G. R. Wall, E.M. Thurman, D. A. Eckhardt, J. Vanhoesen
Seasonal and spatial patterns of nitrate and silica concentrations in Canajoharie Creek, New York
The impact of nonpoint-source pollution on surface waters in agricultural watersheds is an emerging environmental issue. As part of the U.S. Geological Survey National Water Quality Assessment program in the Hudson River Basin, Canajoharie Creek was monitored for seasonal and spatial patterns of nutrient chemistry from March 1993 to January 1996. Nitrate and silica concentrations in Canajoharie Cr
Authors
G. R. Wall, P. J. Phillips, K. Riva-Murray
Pesticides in the Hudson River Basin, 1994-96
The occurrence, distribution, and temporal patterns of pesticide concentrations were studied in the Hudson River Basin during 1994 - 96. This article presents the results of three separate pesticide studies conducted as part of the U.S. Geological Survey (USGS) National Water Quality Assessment (NAWQA) program. Pesticides were found in all three studies, but rarely at concentrations exceeding any
Authors
G. R. Wall, P. J. Phillips
Search for New York Water Science Center Projects by County
Search for NYWSC projects by county name.
Geographical Information Systems (GIS)
Geographical Information Systems Information and Data
Our Science
The New York Water Science Center conducts research and investigations used across a broad range of industries and other services.
New York Flood Information
For emergency situations, please contact Chris Gazoorian, Surface Water Specialist at the USGS New York Water Science Center or call our general number (518) 285-5600 and follow the directions to leave voicemail which will be immediately forwarded to a responsible party and responded to as quickly as possible.
An Investigation into the Water Surface Elevation Changes of Moreau Lake, Moreau Lake State Park, Saratoga County, NY
Background: Moreau Lake is located within Moreau Lake State Park, a 4,100 acre park divided by the Hudson River in northern Saratoga and southern Warren Counties of upstate New York. Moreau Lake has a surface area of 128 acres, a watershed of 469 acres, and 3.6 miles of shoreline. The lake has a “normal” mean depth of 32 feet and a maximum depth of 50 feet. An outlet control structure at the so
New York State Flood Investigations
Flooding can be a serious problem in many parts of New York State. Information on floods and analyses of flood data are needed to aid in the design of bridges, culverts, dams, highways, and buildings, and for the prudent management of flood-prone areas. Documentation of floods and a more thorough understanding of flood hydrology and hydraulics will result in more effective management of flood...
New York Water Science Center Data Program
Objective: The USGS New York Water Science Center (NYWSC) works with other Federal agencies as well as with State, municipal, and tribal agencies to provide research and data about water-related issues. Relevance and Impact: The NYWSC leads the scientific and water-resources management communities by providing high-quality, timely, and unbiased scientific data, reports, and other information that
USGS Hudson River Watershed Suspended-Sediment Monitoring Network
The USGS NY Water Science Center maintains a network of near-real-time sensors to monitor the movement of suspended sediment into and through the freshwater reach of the tidal Hudson River. Information from this network helps quantify the movement of sediment in the watershed to assist resource managers and stakeholders reduce dredging costs, target resources to mitigate soil loss, and modify land...
Science and Products
Filter Total Items: 17
Surrogate analysis and index developer (SAID) tool and real-time data dissemination utilities
The use of acoustic and other parameters as surrogates for suspended-sediment concentrations (SSC) in rivers has been successful in multiple applications across the Nation. Critical to advancing the operational use of surrogates are tools to process and evaluate the data along with the subsequent development of regression models from which real-time sediment concentrations can be made available to
Authors
Marian M. Domanski, Timothy D. Straub, Molly S. Wood, Mark N. Landers, Gary R. Wall, Steven J. Brady
Maximum known stages and discharges of New York streams and their annual exceedance probabilities through September 2011
Maximum known stages and discharges at 1,400 sites on 796 streams within New York are tabulated. Stage data are reported in feet. Discharges are reported as cubic feet per second and in cubic feet per second per square mile. Drainage areas range from 0.03 to 298,800 square miles; excluding the three sites with larger drainage areas on the St. Lawrence and Niagara Rivers, which drain the Great Lake
Authors
Gary R. Wall, Patricia M. Murray, Richard Lumia, Thomas P. Suro
Sediment transport due to extreme events: The Hudson River estuary after tropical storms Irene and Lee
Tropical Storms Irene and Lee in 2011 produced intense precipitation and flooding in the U.S. Northeast,
including the Hudson River watershed. Sediment input to the Hudson River was approximately 2.7 megaton, about
5 times the long-term annual average. Rather than the common assumption that sediment is predominantly trapped
in the estuary, observations and model results indicate that approximat
Authors
David K. Ralston, John C. Warner, W. Rockwell Geyer, Gary R. Wall
Combined sewer overflows: an environmental source of hormones and wastewater micropollutants
Data were collected at a wastewater treatment plant (WWTP) in Burlington, Vermont, USA, (serving 30,000 people) to assess the relative contribution of CSO (combined sewer overflow) bypass flows and treated wastewater effluent to the load of steroid hormones and other wastewater micropollutants (WMPs) from a WWTP to a lake. Flow-weighted composite samples were collected over a 13 month period at th
Authors
P. J. Phillips, A.T. Chalmers, J.L. Gray, D.W. Kolpin, W.T. Foreman, G. R. Wall
Suspended sediment transport in the freshwater reach of the Hudson river estuary in eastern New York
Deposition of Hudson River sediment into New York Harbor interferes with navigation lanes and requires continuous dredging. Sediment dynamics at the Hudson estuary turbidity maximum (ETM) have received considerable study, but delivery of sediment to the ETM through the freshwater reach of the estuary has received relatively little attention and few direct measurements. An acoustic Doppler current
Authors
G. R. Wall, E.A. Nystrom, S. Litten
Use of an ADCP to compute suspended-sediment discharge in the tidal Hudson River, New York
Acoustic Doppler current profilers (ADCPs) can provide data needed for computation of suspended-sediment discharge in complex river systems, such as tidal rivers, in which conventional methods of collecting time-series data on suspended-sediment concentration (SSC) and water discharge are not feasible. Although ADCPs are not designed to measure SSC, ADCP data can be used as a surrogate under certa
Authors
Gary R. Wall, Elizabeth A. Nystrom, Simon Litten
Calculating mercury loading to the tidal Hudson River, New York, using rating curve and surrogate methodologies
Total mercury (THg) load in rivers is often calculated from a site-specific "rating-curve" based on the relation between THg concentration and river discharge along with a continuous record of river discharge. However, there is no physical explanation as to why river discharge should consistently predict THg or any other suspended analyte. THg loads calculated by the rating-curve method were compa
Authors
G. R. Wall, H. H. Ingleston, S. Litten
Proceedings of the Federal Interagency Workshop on Turbidity and other Sediment Surrogates, April 30-May 2, 2002, Reno, Nevada
No abstract available.
Authors
John R. Gray, G. Douglas Glysson
Regional patterns of pesticide concentrations in surface waters of New York in 1997
The predominant mixtures of pesticides found in New York surface waters consist of five principal components. First, herbicides commonly used on corn (atrazine, metolachlor, alachlor, cyanazine) and a herbicide degradate (deethylatrazine) were positively correlated to a corn-herbicide component, and watersheds with the highest corn-herbicide component scores were those in which large amounts of ro
Authors
Patrick J. Phillips, David A. Eckhardt, Douglas A. Freehafer, Gary R. Wall, H. H. Ingleston
Metolachlor and its metabolites in tile drain and stream runoff in the canajoharie creek watershed
Water samples collected during April−November 1997 from tile drains beneath cultivated fields in central New York indicate that two metabolites of the herbicide metolachlormetolachlor ESA (ethanesulfonic acid) and OA (oxanilic acid)can persist in agricultural soils for 4 or more years after application and that fine-grained soils favor the transport of metolachlor ESA over metolachlor and metolach
Authors
P. J. Phillips, G. R. Wall, E.M. Thurman, D. A. Eckhardt, J. Vanhoesen
Seasonal and spatial patterns of nitrate and silica concentrations in Canajoharie Creek, New York
The impact of nonpoint-source pollution on surface waters in agricultural watersheds is an emerging environmental issue. As part of the U.S. Geological Survey National Water Quality Assessment program in the Hudson River Basin, Canajoharie Creek was monitored for seasonal and spatial patterns of nutrient chemistry from March 1993 to January 1996. Nitrate and silica concentrations in Canajoharie Cr
Authors
G. R. Wall, P. J. Phillips, K. Riva-Murray
Pesticides in the Hudson River Basin, 1994-96
The occurrence, distribution, and temporal patterns of pesticide concentrations were studied in the Hudson River Basin during 1994 - 96. This article presents the results of three separate pesticide studies conducted as part of the U.S. Geological Survey (USGS) National Water Quality Assessment (NAWQA) program. Pesticides were found in all three studies, but rarely at concentrations exceeding any
Authors
G. R. Wall, P. J. Phillips
Search for New York Water Science Center Projects by County
Search for NYWSC projects by county name.
Geographical Information Systems (GIS)
Geographical Information Systems Information and Data
Our Science
The New York Water Science Center conducts research and investigations used across a broad range of industries and other services.
New York Flood Information
For emergency situations, please contact Chris Gazoorian, Surface Water Specialist at the USGS New York Water Science Center or call our general number (518) 285-5600 and follow the directions to leave voicemail which will be immediately forwarded to a responsible party and responded to as quickly as possible.
An Investigation into the Water Surface Elevation Changes of Moreau Lake, Moreau Lake State Park, Saratoga County, NY
Background: Moreau Lake is located within Moreau Lake State Park, a 4,100 acre park divided by the Hudson River in northern Saratoga and southern Warren Counties of upstate New York. Moreau Lake has a surface area of 128 acres, a watershed of 469 acres, and 3.6 miles of shoreline. The lake has a “normal” mean depth of 32 feet and a maximum depth of 50 feet. An outlet control structure at the so
New York State Flood Investigations
Flooding can be a serious problem in many parts of New York State. Information on floods and analyses of flood data are needed to aid in the design of bridges, culverts, dams, highways, and buildings, and for the prudent management of flood-prone areas. Documentation of floods and a more thorough understanding of flood hydrology and hydraulics will result in more effective management of flood...
New York Water Science Center Data Program
Objective: The USGS New York Water Science Center (NYWSC) works with other Federal agencies as well as with State, municipal, and tribal agencies to provide research and data about water-related issues. Relevance and Impact: The NYWSC leads the scientific and water-resources management communities by providing high-quality, timely, and unbiased scientific data, reports, and other information that
USGS Hudson River Watershed Suspended-Sediment Monitoring Network
The USGS NY Water Science Center maintains a network of near-real-time sensors to monitor the movement of suspended sediment into and through the freshwater reach of the tidal Hudson River. Information from this network helps quantify the movement of sediment in the watershed to assist resource managers and stakeholders reduce dredging costs, target resources to mitigate soil loss, and modify land...