Publications

Sources and transport for phosphorous and nitrogen to the Tualatin River, Oregon, were characterized for summer (May through October) low-flow conditions during 1991, 1992, and 1993. Mass balances for water and chemical constituents, which were generated for the main-stem river, provide important context for nutrient-reduction efforts in the basin.

IntroductionVirginia Beach is a rapidly growing city of more than 425,000 people. Sources of fresh water within the city, however, are limited. Prior to 1998, the Virginia Beach Public Utilities Department met the city's water needs by purchasing treated drinking water from the City of Norfolk. Because Norfolk had to meet its own requirements, the amount of water available to Virginia Beach was li

As part of the Northern Rockies Intermontane Basins study of the National Water-Quality Assessment Program, data collected between 1974 and 1996 were compiled to describe contaminants in tissue of riverine species. Tissue-contaminant data from 11 monitoring programs and studies representing 28 sites in the study area were summarized. Tissue-contaminant data for most streams generally were lacking.

An inventory of public water-supply systems in Tennessee in 1995 indicated that 530 public water-supply systems supplied water to 4.42 million people, or 84 percent of Tennessee's population. Public-supply water withdrawals totaled 779 million gallons per day, 64 percent (500 million gallons per day) of which was from surface-water sources. All of the surface-water withdrawals for public-water sup

A monitoring program for nitrate in ground water in and near Torrington, Wyoming was conducted by the Town of Torrington from April 1994 through March 1997, and cooperatively by the Town of Torrington and the U.S. Geological Survey from May 1997 through August 1998. Trends in nitrate concentrations were determined for the period of time covered by both monitoring programs. A significant trend was

Many contaminants introduced into the environment by human activities are hydrophobic, meaning they are relatively insoluble in water and, thus, are associated primarily with sediments. These contaminants include the organochlorine pesticides DOT and chlordane, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) from industrial facilities and urban areas, and heavy metals

Severe flooding in parts of south-central Texas resulted from a major storm during October 17–18, 1998. The flooding occurred in parts of the major streams and tributaries of the San Jacinto, San Benard, Colorado, Lavaca, Guadalupe, and San Antonio River Basins. Peak gage height, peak streamflow, and documentation of the significance of the peaks were compiled for the streamflow-gaging stations wh

Stream stage and discharge and the quality of water flowing from Rattlesnake Creek into the Quivira National Wildlife Refuge in south-central Kansas are being monitored by the U.S. Geological Survey in cooperation with the U.S. Fish and Wildlife Service using an innovative, real-time monitoring approach. Continuously recorded data and data from periodic collection of water-quality samples are bein

A numerical ground-water flow model of a hypothetical basin typical of those in the Puget Sound Lowland of western Washington simulated effects of ground-water withdrawals on rates of natural discharge to streams and springs. The model was calibrated to natural conditions and simulated effects by varying distance from well to stream, presence of confining layers, pumping rate, depth of pumped aqui

The discharge, water temperature, and water quality of the Tualatin River in northwestern Oregon was simulated with CE-QUAL-W2, a two-dimensional, laterally averaged model developed by the U.S. Army Corps of Engineers. The model was calibrated for May through October periods of 1991, 1992, and 1993. Nine hypothetical scenarios were tested with the model to provide insight for river managers and re

No abstract available.

Tissue samples of whole body white sucker (Catostomus commersoni) were collected at 15 sites and smallmouth bass (Micropterus dolomieu) were collected at 5 sites during 1992 in the Lower Susquehanna River Basin to determine the occurrence and distribution of 28 selected organochlorine compounds as part of the U.S. Geological Survey’s National Water-Quality Assessment (NAWQA) Program. Only 12 of th