D. K. Stevens

Publications141
h-index24
Citations1,866
Highly Influential Citations94
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An Innovative Index for Evaluating Water Quality in Streams
A water quality index expressed as a single number is developed to describe overall water quality conditions using multiple water quality variables. The index consists of water quality variables:… Expand
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Using Bayesian networks to model watershed management decisions: an East Canyon Creek case study
TLDR
An approach to developing and using Bayesian networks to model watershed management decisions is presented with a case study application to phosphorus management in Northern Utah, USA. Expand
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SURROGATE MEASURES FOR PROVIDING HIGH FREQUENCY ESTIMATES OF TOTAL SUSPENDED SOLIDS AND TOTAL PHOSPHORUS CONCENTRATIONS 1
Surrogate measures like turbidity, which can be observed with high frequency in situ, have potential for generating high frequency estimates of total suspended solids (TSS) and total phosphorus (TP)… Expand
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Conversion of trichloroacetic acid to dichloroacetic acid in biological samples.
Trichloroethylene (TCE) has been identified as an environmental contaminant in groundwater. Trichloroacetic acid (TCA), dichloroacetic acid (DCA), chloral hydrate (CH), trichloroethanol (TCOH), and… Expand
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A sensor network for high frequency estimation of water quality constituent fluxes using surrogates
TLDR
We describe the observing infrastructure required to make high frequency estimates of water quality constituent fluxes based on surrogate data at multiple sites within an environmental observatory. Expand
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Optimization of anaerobic hydrogen and methane production from dairy processing waste using a two-stage digestion in induced bed reactors (IBR)
Abstract This study investigated the effects of pH, temperature and hydraulic retention time (HRT) and organic loading rate (OLR) on hydrogen production from dairy processing waste (DPW) in… Expand
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Stability studies on the cyanobacterial nicotinic alkaloid anatoxin-A.
Anatoxin-a (ANTX-a) is a potent nicotinic cholinergic bicyclic secondary amine produced by some toxigenic strains of Anabaena spp. cyanobacteria (LD50 = 0.20-0.25 mg/kg i.p., mouse). Studies were… Expand
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Surrogate Measures for Providing High-frequency Estimates of Total Suspended Solids and Phosphorus Concentrations
Spackman Jones, Amber, David K. Stevens, Jeffery S. Horsburgh, and Nancy O. Mesner, 2010. Surrogate Measures for Providing High Frequency Estimates of Total Suspended Solids and Total Phosphorus… Expand
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Kinetics of chloral hydrate and its metabolites in male human volunteers.
Chloral hydrate (CH) is a short-lived intermediate in the metabolism of trichloroethylene (TRI). TRI, CH, and two common metabolites, trichloroacetic acid (TCA) and dichloroacetic acid (DCA) have… Expand
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Influence of sampling frequency on estimation of annual total phosphorus and total suspended solids loads
The determination of sediment and nutrient loads is typically based on the collection and analysis of grab samples. The frequency and regularity of traditional sampling may not provide representation… Expand
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