1,262 Matching Results

Search Results

Advanced search parameters have been applied.

Ballast Water Management to Combat Invasive Species

Description: The arrival of zebra mussels in the Great Lakes and their subsequent damage to city water supplies and electric utilities has focused significant attention on ballast water discharge by cargo ships as a high-risk mechanism for species invasion. New management efforts attempt to address this concern. Congress is considering legislative proposals to amend and reauthorize the Nonindigenous Aquatic Nuisance Prevention and Control Act, including specific provisions that would modify how ballast water is managed. This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Date: October 1, 2007
Creator: Buck, Eugene H.
Partner: UNT Libraries Government Documents Department

Ballast Water Management to Combat Invasive Species

Description: The 111th Congress may elect to consider legislation (H.R. 500 and S. 237) that has been introduced to amend and reauthorize the Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 to further study vessel ballast water management standards and modify how ballast water is handled. This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Date: July 8, 2010
Creator: Buck, Eugene H.
Partner: UNT Libraries Government Documents Department

Origins and Distribution of Saline Ground Waters in the Floridian Aquifer in Coastal Southwest Florida

Description: From introduction: Recognizing the need for comprehensive information about these waters of variable quality, the U.S. Geological Survey, in cooperation with the Southwest Florida Water Management District, investigated their character and distribution in the Mansota and lower Peace Basins (fig. 1). This report presents the results of the study. Principal objectives were to: (1) develop a better understanding of areal water-quality variations, and (2) relate the information developed to the extant concepts of the areal geohydrologic system.
Date: 1982
Creator: Steinkampf, W. C.
Partner: UNT Libraries Government Documents Department

Preliminary Evaluation of Lake Susceptibility to Water-Quality Degradation by Recreational Use, Alpine Lakes Wildness Area, Washington

Description: From introduction: This study was designed to make optimal use of existing data in a short period of time to fulfill an immediate need of the U.S. Forest Service for use in legislatively mandated wilderness-area planning.
Date: 1980
Creator: Gilliom, R. J.; Dethier, D. P.; Safioles, S. A. & Heller, P. L.
Partner: UNT Libraries Government Documents Department

Shallow Ground Water in the Boulder-Fort Collins-Greeley Area, Front Range Urban Corridor, Colorado, 1975-77

Description: From introduction: This investigation was made as part of a comprehensive geohydrologic study of the Front Range Urban Corridor in Colorado conducted by the U.S. Geological Survey. The purpose of the study was to delineate the areal extent of the aquifer, the altitude and configuration of the water table, and the gradient and underflow in various parts of the area, in order to better understand the quality of water moving into and through the aquifer.
Date: 1983
Creator: Schneider, Paul A., Jr.
Partner: UNT Libraries Government Documents Department

Municipal Solid-Waste Disposal and Ground-Water Quality in a Coastal Environment, West-Central Florida

Description: From introduction: This report explains how landfills can affect ground-water resources in a coastal environment. The report defines solid waste and briefly describes the four common methods for its disposal. The landfill method used in coastal west-central Florida is described in detail. It also presents hydrologic and geologic factors to be considered when locating landfills in a coastal environment and describes how to plan a water-quality monitoring program at a landfill site. Examples from other studies of the impact of landfills on ground water in coastal areas of west-central Florida are included.
Date: 1983
Creator: Fernandez, Mario, Jr.
Partner: UNT Libraries Government Documents Department

Water Resources of the Santa Fe River Basin, Florida

Description: From purpose and scope: The purpose of this report is to present an analysis of the stream-aquifer system of the Santa Fe River basin, including the quantity and quality of water available from each source and their interrelation. Much information is available in previously published reports, but the basin has not been previously evaluated as a hydrologic unit.
Date: 1983
Creator: Hunn, James D. & Slack, Larry J.
Partner: UNT Libraries Government Documents Department

Inland Travel of Tide-Driven Saline Water in the Altamaha and Satilla Rivers, Georgia, and the St. Mary's River, Georgia-Florida

Description: From introduction: The purpose of this study was to determine the distance the tide-driven saline water from the ocean traveled upstream and to define the specific-conductance and chloronity gradients in the lower reaches of the Altamaha, Satilla, and St. Marys Rivers during the high spring tide and low-flow event.
Date: 1983
Creator: Brooks, Myron H. & McConnell, James B.
Partner: UNT Libraries Government Documents Department

Water Quality of Alignment, Farquar, and Long Lakes in Apple Valley, Minnesota

Description: Abstract: Alimagnet, Farquar, and Long Lakes, in Apple Valley, Minnesota, were sampled from 1973-79 to determine their physical and chemical characteristics. A storm-sewer inlet to Alimagnet Lake was also sampled during two storms in 1978. The 1976-77 drought caused a more noticeable effect on the quality of the lakes than any other factor. Chloride concentrations were 10 to 15 milligrams per liter before the drought, but increased 2 to 4 times during the drought. Dissolved solids reacted similarly . Dissolved oxygen and pH were governed mainly by biological activity. In February 1977, dissolved-oxygen concentration was less than 0.5 milligrams per liter in the three lakes. Ratios between mean total nitrogen and mean total phosphorus ranged from 22:1 to 26:1. Tropic-state indices indicate that the lakes are eutrophic. Blue-green algae dominated the phytoplankton populations. Storms sampled at a storm-sewer inlet to Alimagnet Lake showed higher concentrations pf chromium, copper, nickel, and zinc than of lead, arsenic, cadmium, and mercury. Total phosphorus for the September 1978 storm had a concentration of 1.7 milligrams per liter, which means that approximately 29 pounds entered the lake during the 5.5-hour sampling period.
Date: June 1981
Creator: Have, Mark R.; Payne, Gregory A. & Ayers, Mark A.
Partner: UNT Libraries Government Documents Department

Assessment of Water Quality in Streams Draining Coal-Producing Areas in Ohio

Description: From introduction: In 1975 a project was begun to provide information on several aspects of coal hydrology in Ohio. The first phase was a reconnaissance of water-quality conditions in coal-mining regions. Phase one had two primary objectives; to document the occurrence of certain inorganic and organic constituents in waters of the coal-mining regions and to determine if the concentrations of those constituents were related to coal mining. The second phase of the project was a more detailed study of four basins sampled during the first phase.
Date: October 1981
Creator: Pfaff, Christine L.; Helsel, Dennis R.; Johnson, Dorothy P. & Angelo, Clifford G.
Partner: UNT Libraries Government Documents Department

A Reconnaissance of Ground-Water Contamination at Selected Landfills in Colorado

Description: Abstract: A reconnaissance study of eight landfills in Colorado shows that they have contaminated the shallow ground-water system. Contamination is indicated by values of specific conductance and concentrations of major ions and trace elements. Because only shallow ground water was sampled, it was not possible to determine whether deeper ground-water systems also are contaminated. The major effects on water quality caused by contaminants in the land-fills were increased salinity, nitrogen, iron, manganese, and phenols in the shallow ground-water system.
Date: 1983
Creator: Schneider, Paul A., Jr. & Turk, John T.
Partner: UNT Libraries Government Documents Department

Analysis of Stream Quality in the Yampa River Basin, Colorado and Wyoming

Description: From introduction: This report relates to the first of the above objectives by describing stream quality in the Yampa River basin through 1976, with particular emphasis on conditions from August 1975 through September 1976. The content of this report is, at times, relatively technical. This is intentional. The report is aimed not at planners and decision makers but rather at those persons assigned the task of having to design, implement, and interpret a river basin assessment. The techniques and procedures used to determine ambient stream quality in the Yampa River basin have been presented in detail so that their applicability to other river basins can be determined. For the planner and decision maker, the results presented in this report are summarized in less technical terms in phase-l (Steele and others, 1979) and phase-ll summary reports.
Date: April 1980
Creator: Wentz, Dennis A. & Steele, Timothy Doak
Partner: UNT Libraries Government Documents Department

Surface-Water Quality in the Campbell Creek Basin, Anchorage, Alaska

Description: From introduction: Data adequate to describe general flow conditions have been collected on most major streams in the Anchorage area, but comparable water-quality data needed to determine the effect of urbanization on the streams are scarce. Thus, in 1980 the U.S. Geological Survey, in cooperation with the Municipality of Anchorage, began a study of the effects of urban runoff on stream-water quality. A premise of the study was that urbanization does have an effect on the quality of surface runoff. The primary purpose of the study was to determine differences in water-quality characteristics between streams that drain natural and urban areas in Anchorage.
Date: 1983
Creator: Brabets, Timothy P. & Wittenberg, Loren A.
Partner: UNT Libraries Government Documents Department

Hydrogeologic and Water-Quality Characteristics of the St. Peter Aquifer, Southeast Minnesota

Description: From abstract: This report is one of a series on the hydrogeology and water quality of the 14 principal aquifers in Minnesota prepared by the U.S. Geological Survey. The U.S. Environmental Protection Agency requested these studies because of the need for information to develop its Underground Injection Control Program.
Date: 1983
Creator: Ruhl, J. F. & Wolf, R. J.
Partner: UNT Libraries Government Documents Department

Appraisal of Water-Quality Conditions, Lower Black River, Windsor County, Vermont

Description: From purpose and scope: The objectives of the study are to assess the overall water-quality conditions, discuss the variations in water quality and probable causes, evaluate the effects of secondary treated wastewater on impoundments, and analyze the effect of streamflow regulation on algal production within and downstream of impoundments.
Date: 1983
Creator: Toppin, Kenneth W.
Partner: UNT Libraries Government Documents Department

Hydrology of the Sand-and-Gravel Aquifer, Southern Okaloosa and Walton Counties, Northwest Florida

Description: From purpose and scope: This report presents those results of the investigation which pertain to the hydrogeology and availability and quality of water from the sand-and-gravel aquifer. It discusses the hydrogeologic characteristics, hydraulic properties, potential yield, and water quality of the aquifer.
Date: 1983
Creator: Hayes, Larry R. & Barr, Douglas E.
Partner: UNT Libraries Government Documents Department