UNT Research, Volume 16, 2006

UNT Research, Volume 16, 2006

Date: 2006
Creator: University of North Texas
Description: UNT Research magazine includes articles and notes about research at University of North Texas in various academic fields.
Contributing Partner: University Relations, Communications & Marketing department for UNT
Regional Assessment of Water Quality: Trinity River Basin

Regional Assessment of Water Quality: Trinity River Basin

Date: October 1992
Creator: Alan Plummer and Associates, Inc.
Description: The purpose of this study is "to identify significant issues affecting water quality" within the Trinity River watershed, located in the eastern half of Texas, "and to provide sufficient information for the Commission, river authorities, and other local government bodies to take appropriate corrective action necessary to maintain and improve the quality of [the] state's water resources" (p. [1]).
Contributing Partner: UNT Libraries
Radioecological Studies of the Hudson River

Radioecological Studies of the Hudson River

Date: 1973
Creator: New York University. Medical Center. Institute of Environmental Medicine.
Description: "This report summarizes the results of the Hudson River radioecological studies conducted in 1973" (p. 1). The study investigates the behavior of gamma-emitting radionuclides in the Hudson River and the accumulation of natural alpha-emitting radionuclides.
Contributing Partner: UNT Libraries
Simulation of local watershed nutrient and sediment delivery to Lake Texoma.

Simulation of local watershed nutrient and sediment delivery to Lake Texoma.

Date: May 2004
Creator: Upton, Alexandra C.
Description: A hydrologic model and watershed export model was used to estimate the loading of nutrients and total suspended solids from un-gaged local watersheds associated with Lake Texoma. Discharge to the reservoir from local watersheds was predicted using a modification of the curve number method in HEC Hydrologic Modeling System (HEC-HMS). Event mean concentrations were applied to land use to estimate loadings of nutrients and TSS. Total discharge from the local watersheds was estimated to be 3.02 x 107 cubic meters for a study window of March 1 to May 31, 1997, less than 10 percent of the input to the lake from the Red River and Washita River systems. Loadings were estimated to be 33,553 kg nitrogen, 4,401 kg phosphorus, and 3,423,140 kg TSS. The models and results obtained from their application appear to have potential utility for use in a water quality management decision support system for the reservoir.
Contributing Partner: UNT Libraries
Assessment of sediment runoff from natural gas well development sites.

Assessment of sediment runoff from natural gas well development sites.

Date: May 2007
Creator: Havens, David Loran
Description: Storm water sediment runoff from disturbed landscapes has the potential to impair aquatic environments. Small construction sites of 1-5 acres in the United States are currently regulated by the United States Environmental Protection Agency to minimize storm water runoff damages to the environment. Gas well construction sites are similar to other construction sites in how the landscape is altered, but are not similarly regulated. This study identified sediment runoff from gas well development sites by collecting it in traps and weirs, and by measuring sediment debris lobes. Sediment primarily consisted of silt and clay sized particles. Sediments from two gas well sites formed five debris lobes that ranged in size from 325 to 3,290 square feet. Sediment loadings estimated from the debris lobes averaged 57.1 tons per year/acre. Future studies should focus on further quantification of sediment movement off of gas well sites and identify effective erosion control methods.
Contributing Partner: UNT Libraries
Characterizing Storm Water Runoff from Natural Gas Well Sites in Denton County, Texas

Characterizing Storm Water Runoff from Natural Gas Well Sites in Denton County, Texas

Date: May 2008
Creator: Wachal, David J.
Description: In order to better understand runoff characteristics from natural gas well sites in north central Texas, the City of Denton, with assistance through an EPA funded 104b3 Water Quality Cooperative Agreement, monitored storm water runoff from local natural gas well sites. Storm water runoff was found to contain high concentrations of total suspended solids (TSS). Observed TSS concentrations resulted in sediment loading rates that are similar to those observed from typical construction activities. Petroleum hydrocarbons, in contrast, were rarely detected in runoff samples. Heavy metals were detected in concentrations similar to those observed in typical urban runoff. However, the concentrations observed at the gas well sites were higher than those measured at nearby reference sites. Storm water runoff data collected from these sites were used to evaluate the effectiveness of the water erosion prediction project (WEPP) model for predicting runoff and sediment from these sites. Runoff and sediment predictions were adequate; however, rainfall simulation experiments were used to further characterize the portion of the site where drilling and extraction operations are performed, referred to as the "pad site." These experiments were used to develop specific pad site erosion parameters for the WEPP model. Finally, version 2 of the revised universal ...
Contributing Partner: UNT Libraries
Evaluation Of WEPP For Runoff And Sediment Yield Prediction On Natural Gas Well Sites

Evaluation Of WEPP For Runoff And Sediment Yield Prediction On Natural Gas Well Sites

Date: 2008
Creator: Wachal, David J.; Harmel, R. Daren; Banks, Kenneth E. & Hudak, Paul F.
Description: This article discusses the evaluation of Water Erosion Prediction Project (WEPP) for runoff and sediment yield prediction on natural gas well sites, instead of focusing only on the effects on fields, rangelands, and forests.
Contributing Partner: UNT College of Arts and Sciences