Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
Filter Total Items: 3787
A new formula for the analytical solution of the radial dispersion problem
A new formula is presented for the analytical solution of the radial dispersion problem, which analyzes the dispersive transport of a tracer in radial flow from a recharge well. This formula is simpler than a solution presented by previous investigators, but the two solutions are shown to be equivalent. Because the analytical solution consists of an integral of an oscillatory function, it is evalu
Authors
Paul A. Hsieh
Chemical qualities of water that contribute to human health in a positive way
The emphasis on harmful substances that may occur in potable waters has almost obscured the fact that important beneficial constituents are commonly present.The chemical substances in water that make positive contributions to human health act mainly in two ways: (i) nutritionally, by supplying essential macro and micro elements that the diet (excluding water) may not provide in adequate amounts (f
Authors
Howard C. Hopps
Discussion of "Aquifer test analysis in fractured rocks with linear flow pattern"
No abstract available
Authors
Paul A. Heish
Groundwater transport of strontium 90 in a glacial outwash environment
As part of the investigation of groundwater contamination at a uranium-scrap recovery plant at Wood River Junction, Rhode Island, laboratory experiments led to the development of a model for predicting the transport of strontium 90 in glacial outwash sediments based on an approximate mechanism for ion exchange. The multicomponent system was simplified to two components by regarding all exchangeabl
Authors
Kenneth L. Kipp, Kenneth G. Stollenwerk, David B. Grove
Modeling contamination of shallow unconfined aquifers through infiltration beds
We model the transport of a simply reactive contaminant through an infiltration bed and underlying shallow, one-dimensional, unconfined aquifer with a plane, steeply sloping bottom in the assumed absence of dispersion and downgradient dilution. The effluent discharge and ambient groundwater flow under the infiltration beds are presumed to form a vertically mixed plume marked by an appreciable radi
Authors
D.W. Ostendorf
Predictive accuracy of a ground-water model--Lessons from a postaudit
Hydrogeologic studies commonly include the development, calibration, and application of a deterministic simulation model. To help assess the value of using such models to make predictions, a postaudit was conducted on a previously studied area in the Salt River and lower Santa Cruz River basins in central Arizona. A deterministic, distributed-parameter model of the ground-water system in these all
Authors
Leonard F. Konikow
Discussion of "Aquifer test analysis in fractured rocks with linear flow pattern" by Z. Sen
No abstract available.
Authors
Paul A. Heish
Physio-chemical processes affecting copper, tin and zinc toxicity to algae: A review
This chapter focuses on the physic-chemical processes affecting copper, zinc, and tin toxicity to algae. Both Cu and Zn are essential algal micronutrients, cofactors in numerous biochemical processes. The availability of a nutrient or toxic substance can be significantly affected by precipitation. Methods for modeling the effects of adsorption–desorption reactions have been previously reviewed. Us
Authors
James S. Kuwabara
Parameters affecting the partition coefficients of organic compounds in solvent-water and lipid-water systems
No abstract available.
Authors
C. T. Chiou, J.H. Block
Metabolism of reduced methylated sulfur compounds in anaerobic sediments and by a pure culture of an estuarine methanogen
Addition of dimethylsulfide (DMS), dimethyldisulfide (DMDS), or methane thiol (MSH) to a diversity of anoxic aquatic sediments (e.g., fresh water, estuarine, alkaline/hypersaline) stimulated methane production. The yield of methane recovered from DMS was often 52 to 63%, although high concentrations of DMS (as well as MSH and DMDS) inhibited methanogenesis in some types of sediments. Production o
Authors
R.P. Kiene, Ronald S. Oremland, Anthony Catena, Laurence G. Miller, D.G. Capone
Variability in the fractionation of Cu, Ag, and Zn among cytosolic proteins in the bivalve Macoma balthica
Gel filtration chromatographs of cytosols from the clam Macorna balthica analysed from both field and laboratory treated specimens showed that uptake of Cu, Ag, and Zn in the metallothionein-like protein (MLP) pool follows exposure both in nature and in the laboratory. Specimens collected from San Francisco Bay over 18 mo showed strong temporal variability in the fractionation of the metals among
Authors
C. Johansson, Daniel J. Cain, Samuel N. Luoma
Digital image measurement of the area and anatomical structure of tree rings
A microcomputer coupled to a video digitizer was used to develop methods for measuring areas of tree rings and for delineating and measuring microscopic anatomical features. Digitally imaged areas of individual rings of a loblolly pine cross section were within 2.6% of areas measured with a planimeter and were more accurate than areas calculated from radius widths. Various anatomical features were
Authors
Thomas M. Yanosky, Charles J. Robinove