Water Quality Aspects of an Intermittent Stream and Backwaters in an Urban North Texas Watershed

Water Quality Aspects of an Intermittent Stream and Backwaters in an Urban North Texas Watershed

Date: August 2002
Creator: Taylor, Ritchie Don
Description: Pecan Creek flows southeast through the City of Denton, Texas. Characterized as an urban watershed, the basin covers approximately 63.5 km2. Pecan Creek is an intermittent stream that receives nonpoint runoff from urban landuses, and the City of Denton's wastewater treatment plant, Pecan Creek Water Reclamation Plant, discharges effluent to the stream. Downstream from the City of Denton and the wastewater treatment plant, Pecan Creek flows about 6,000 m through agricultural, pasture, and forested landscapes into Copas Cove of Lake Lewisville, creating backwater conditions. Pecan Creek water quality and chemistry were monitored from August 1997 to October 2001. Water quality was influenced by seasonal, spatial, climatic, and diurnal dynamics. Wastewater effluent discharged from the Pecan Creek Water Reclamation Plant had the greatest influence on water quality of the stream and backwaters. Water quality monitoring of Pecan Creek demonstrated that dissolved oxygen standards for the protection of aquatic life were being achieved. Water quality modeling of Pecan Creek was completed to assess future increases in effluent flow from the Pecan Creek Water Reclamation Plant. Water quality modeling indicated that dissolved oxygen standards would not be achieved at the future effluent flow of 21 MGD and at NPDES permitted loadings. Model results ...
Contributing Partner: UNT Libraries
Clean Water Act and Pollutant Total Maximum Daily Loads (TMDLs)

Clean Water Act and Pollutant Total Maximum Daily Loads (TMDLs)

Date: January 17, 2014
Creator: Copeland, Claudia
Description: This report discusses the total maximum daily load (TMDL) program which regulates pollutants to ensure that water quality standards can be attained; section 303(d) of the Clean Water Act requires states to identify waters that are impaired by pollution, even after application of pollution controls. The report focuses on new challenges facing the TMDL program, including more complex TMDLs, larger scale impairments, and nonpoint sources.
Contributing Partner: UNT Libraries Government Documents Department
Bacterial Survey of Representative Denton County Wells with Special Reference to Sanitation

Bacterial Survey of Representative Denton County Wells with Special Reference to Sanitation

Date: June 1937
Creator: Roberts, Sally Stevens
Description: This thesis aimed to study the seventy-two representative wells of Denton County and to determine the possibilities of infection with typhoid organism. The sanitary survey and the test for Colon-Aerogenes bacteria show that 55% of the 72 wells studied are unsanitary, 27% are sanitary, and 18% are doubtful.
Contributing Partner: UNT Libraries
Ballast Water Management to Combat Invasive Species

Ballast Water Management to Combat Invasive Species

Date: June 10, 2008
Creator: Buck, Eugene H.
Description: This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Contributing Partner: UNT Libraries Government Documents Department
Controversies over Redefining “Fill Material” Under the Clean Water Act

Controversies over Redefining “Fill Material” Under the Clean Water Act

Date: April 20, 2009
Creator: Copeland, Claudia
Description: This report discusses the Clean Water Act that contains two different permitting regimes: (1) Section 402 permits (called the National Pollutant Discharge Elimination System, or NPDES, permit program) address the discharge of most pollutants, and (2) Section 404 permits address the discharge of dredged or fill material into navigable waters of the United States at specified sites. These permit programs differ in nature and approach.
Contributing Partner: UNT Libraries Government Documents Department
Wastewater Treatment: Overview and Background

Wastewater Treatment: Overview and Background

Date: March 20, 2008
Creator: Copeland, Claudia
Description: The Clean Water Act prescribes performance levels to be attained by municipal sewage treatment plants in order to prevent the discharge of harmful wastes into surface waters.
Contributing Partner: UNT Libraries Government Documents Department
Clean Water Act Section 401: Background and Issues

Clean Water Act Section 401: Background and Issues

Date: March 20, 2008
Creator: Copeland, Claudia
Description: Report discussing specifics of the U.S. Clean Water Act. Section 401 of the Clean Water Act requires that an applicant for a federal license or permit provide a certification that any discharges from the facility will comply with the act, including water quality standard requirements. Disputes have arisen over the states' exercise of authority under Section 401. For the most part, the debate over the Section 401 certification issue has been between states and hydropower interests.
Contributing Partner: UNT Libraries Government Documents Department
Stormwater Permits: Status of EPA's Regulatory Program

Stormwater Permits: Status of EPA's Regulatory Program

Date: May 27, 2008
Creator: Copeland, Claudia
Description: This report discusses the regulation of stormwater drainage. Stormwater discharge systems are the pipes and sewer lines that carry rainwater or snow melt, but not domestic sanitary wastes, away from urban areas and commercial and industrial facilities. For many years the focus of the nation's water quality programs was on controlling pollutants associated with industrial process wastewaters and municipal sewage discharges.
Contributing Partner: UNT Libraries Government Documents Department
Water Quality Issues in the 112th Congress: Oversight and Implementation

Water Quality Issues in the 112th Congress: Oversight and Implementation

Date: May 30, 2012
Creator: Copeland, Claudia
Description: This report discusses water quality legislation. A number of Clean Water Act issues have been the subject of congressional oversight and legislation, including the environmental and economic impacts of Chesapeake Bay restoration efforts, federal promulgation of water quality standards in Florida, regulation of surface coal mining activities in Appalachia, and other CWA regulatory actions. Congressional interest in several of these issues has been reflected in debate over policy provisions of legislation providing FY2012 appropriations for EPA (P.L. 112-74).
Contributing Partner: UNT Libraries Government Documents Department
Water Quality Issues in the 112th Congress: Oversight and Implementation

Water Quality Issues in the 112th Congress: Oversight and Implementation

Date: April 9, 2012
Creator: Copeland, Claudia
Description: This report discusses water quality legislation. A number of Clean Water Act issues have been the subject of congressional oversight and legislation, including the environmental and economic impacts of Chesapeake Bay restoration efforts, federal promulgation of water quality standards in Florida, regulation of surface coal mining activities in Appalachia, and other CWA regulatory actions. Congressional interest in several of these issues has been reflected in debate over policy provisions of legislation providing FY2012 appropriations for EPA (P.L. 112-74).
Contributing Partner: UNT Libraries Government Documents Department
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