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John D Gordon

John currently is the reports specialist for the Oklahoma-Texas Water Science Center (OTWSC). Prior to becoming a reports specialist, John served in a number of roles with the USGS, including as a studies chief for the OTWSC where he oversaw surface water, groundwater, and water-quality studies in south Texas.

Prior to becoming a studies chief for the OTWSC, John was the project chief of the Rocky Mountain Arsenal project for the Colorado Water Science Center (CWSC) where he led a team of hydrologist and hydrologic technicians collecting and analyzing various types of hydrogeologic data to assess surface water and groundwater contamination. He also served as the lead for a CWSC priority science topic regarding long-term drought and water supply planning issues, representing the USGS at water availability and flood task force meetings organized by the Colorado Water Conservation Board. Prior to joining the CWSC, John led external quality assurance studies for the National Atmospheric Deposition program to better understand trends in precipitation chemistry and initiated a sediment laboratory quality assurance program to assess the accuracy and precision of sediment analyses. John began his career as a hydrologist in the Arizona WSC where he collected and analyzed surface water, groundwater, and water-quality data.

Education and Certifications

  • John earned his Bachelor of Science degree from Colorado State University in Watershed Science and his Master of Science degree from Colorado School of Mines in Environmental Science and Engineering.

Science and Products

Filter Total Items: 13

Measuring U.S. Federal Agency progress toward implementation of alternative methods in toxicity testing

The U.S. Government Accountability Office (GAO) recommended to Congress that federal agencies establish a workgroup through ICCVAM to propose metrics for assessing progress on the development and promotion of alternative methods. This document describes the recommendations of the ICCVAM Metrics Workgroup.
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Ecosystems, Water Resources, Eastern Ecological Science Center, Patuxent Wildlife Research Center, Oklahoma-Texas Water Science Center

Regional regression equations for estimation of four hydraulic properties of streams at approximate bankfull conditions for different ecoregions in Texas

The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, assessed statistical relations between hydraulic properties of streams at approximate bankfull conditions for different ecological regions (ecoregions) in Texas. Data from more than 103,000 records of measured discharge and ancillary hydraulic properties were assembled from summaries of discharge measurements for 424
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Oklahoma Water Science Center, Oklahoma-Texas Water Science Center

Refining previous estimates of groundwater outflows from the Medina/Diversion Lake system, San Antonio area, Texas

IntroductionIn 2016, the U.S. Geological Survey (USGS), in cooperation with the San Antonio Water System, began a study to refine previously derived estimates of groundwater outflows from Medina and Diversion Lakes in south-central Texas near San Antonio. When full, Medina and Diversion Lakes (hereinafter referred to as the Medina/Diversion Lake system) (fig. 1) impound approximately 255,000 acre-
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Water Resources, Oklahoma-Texas Water Science Center

An overview of historical channel adjustment and selected hydraulic values in the Lower Sabine and Lower Brazos River Basins, Texas and Louisiana

The Sabine and Brazos are alluvial rivers; alluvial rivers are dynamic systems that adjust their geometry in response to changes in streamflow (discharge) and sediment load. In fluvial geomorphology, the term 'channel adjustment' refers to river channel changes in three geometric dimensions: (1) channel slope (profile); (2) the outline or shape, such as meandering or braided, projected on a horizo
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Water Resources, Oklahoma-Texas Water Science Center

Surface water-quality and water-quantity data from selected urban runoff-monitoring sites at the Rocky Mountain Arsenal, Commerce City, Colorado, water years 1988-2004

The U.S. Geological Survey has monitored the quality and quantity of streamflow at the Rocky Mountain Arsenal (RMA) northeast of Denver, Colorado, since the early 1990s in cooperation with the U.S. Army. This report, prepared in cooperation with the U.S. Fish and Wildlife Service, documents existing surface-water-quality conditions on the RMA. All RMA water-quality data for the Irondale Gulch and
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Water Resources, Colorado Water Science Center, Oklahoma-Texas Water Science Center

External quality-assurance results for the national atmospheric deposition program/national trends network, 2000-2001

Five external quality-assurance programs were operated by the U.S. Geological Survey for the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) from 2000 through 2001 (study period): the intersite-comparison program, the blind-audit program, the field-audit program, the interlaboratory-comparison program, and the collocated-sampler program. Each program is designed to measu

External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1997-99

Five external quality-assurance programs were operated by the U.S. Geological Survey for the National Atmospheric Deposition Program/ National Trends Network (NADP/NTN) during 1997 through 1999: the intersite-comparison program, the blind-audit program, the field- audit program, the interlaboratory-comparison program, and the collocated-sampler program. The intersite-comparison program assesses th

Laboratory performance in the Sediment Laboratory Quality-Assurance Project, 1996-98

This report describes the results of the first 3 years of an ongoing study of sediment laboratories used by the U.S. Geological Survey (USGS). The sediment laboratories currently in operation constitute the entire USGS national laboratory system for sediment analyses. As with all environmental data, physical sediment data can be expected to contain a certain amount of difference, whether the diffe

USGS ensures quality of acid rain network

USGS Tracks Acid Rain

The U.S. Geological Survey (USGS) has been actively studying acid rain for the past 15 years. When scientists learned that acid rain could harm fish, fear of damage to our natural environment from acid rain concerned the American public. Research by USGS scientists and other groups began to show that the processes resulting in acid rain are very complex. Scientists were puzzled by the fact that in

Evaluation of candidate rain gages for upgrading precipitation measurement tools for the National Atmospheric Deposition Program

The National Atmospheric Deposition Program (NADP) was established in 1977 to investigate atmospheric deposition and its effects on the environment. Since its establishment, precipitation records have been obtained at all NADP sites using a gage developed approximately 50 years ago-the Belfort 5-780 mechanical rain gage. In 1998 and 1999, a study was done by the U.S. Geological Survey to evaluate

U.S. Geological Survey Quality-Assurance Project for Sediment Analysis

Introduction Sediment is derived primarily from natural weathering of rock and is an assemblage of individual mineral grains that are then deposited by some physical agent, such as water, wind, ice, or gravity (Fetter, 1988). The U.S. Geological Survey (USGS) samples sediments and collects data on the amount of sediment in selected waterways. The most pressing sediment-related problems are asso
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myScience: USGS Citizen Science Project Discovery & Public Engagement Web Application

How can the public discover opportunities for participation in USGS scientific research? What citizen science projects are currently active within the USGS? How may PIs increase public engagement in and awareness of their citizen science projects? To address these questions, a web application leveraging existing Community for Data Integration (CDI) and USGS work was created to allow unprecedented
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Community for Data Integration (CDI)
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myScience: USGS Citizen Science Project Discovery & Public Engagement Web Application

How can the public discover opportunities for participation in USGS scientific research? What citizen science projects are currently active within the USGS? How may PIs increase public engagement in and awareness of their citizen science projects? To address these questions, a web application leveraging existing Community for Data Integration (CDI) and USGS work was created to allow unprecedented
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Science and Products