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Statistical Evaluation of Mechanistic Water‐Quality Models
Publisher: American Society of Civil Engineers
Abstract: Current practice for the verification of water‐quality simulation models is to use a combination of modeler judgment and graphical analysis to assess the adequacy of a model. Statistical testing of goodness‐of‐fit is ...
Confounding Effect of Flow on Estuarine Response to Nitrogen Loading
Publisher: American Society of Civil Engineers
Abstract: The total maximum daily load (TMDL) concept provides the basis for regulating pollution load from riverine sources to impaired water bodies. However, load is comprised of two components: flow and concentration. These two ...
Bayesian Model for Fate and Transport of Polychlorinated Biphenyl in Upper Hudson River
Publisher: American Society of Civil Engineers
Abstract: Modelers of contaminant fate and transport in surface waters typically rely on literature values when selecting parameter values for mechanistic models. While the expert judgment with which these selections are made is ...
Integrated Approach to Total Maximum Daily Load Development for Neuse River Estuary using Bayesian Probability Network Model (Neu-BERN)
Publisher: American Society of Civil Engineers
Abstract: We develop a probability network model to characterize eutrophication in the Neuse River Estuary, North Carolina, and support the estimation of a total maximum daily load (TMDL) for nitrogen. Unlike conventional simulation ...
Robust Multivariate Outlier Detection Methods for Environmental Data
Publisher: American Society of Civil Engineers
Abstract: Outliers are an inevitable concern that needs to be identified and dealt with whenever one analyzes a large data set. Today’s water quality data are often collected on different scales, encompass several sites, monitor ...
Two-Phase Monte Carlo Simulation for Partitioning the Effects of Epistemic and Aleatory Uncertainty in TMDL Modeling
Publisher: American Society of Civil Engineers
Abstract: A two-phase Monte Carlo simulation (TPMCS) uncertainty analysis framework is used to analyze epistemic and aleatory uncertainty associated with simulated exceedances of an in-stream fecal coliform (FC) water quality criterion ...
Comparison of Estuarine Water Quality Models for Total Maximum Daily Load Development in Neuse River Estuary
Publisher: American Society of Civil Engineers
Abstract: The North Carolina Division of Water Quality developed a total maximum daily load (TMDL) to reduce nitrogen inputs into the Neuse River Estuary to address the problem of repeated violations of the ambient chlorophyll