WWRC 89-38
Water Quality Assessment in a Stochastic Stream Environment
Abstract
From a regulatory perspective, the management of stream
environments should reflect the uncertainty of the system which they are
trying to protect. In light of these factors, methodologies are presented
within this article to aid in the quantification of the uncertainty in the
mangement of stream water quality. Specifically, means are developed
for: (1) establishing the probability distribution of dissolved oxygen and
critical location in a stream; (2) finding the critical location under
uncertainty; and (3) quantifying the joint risk of violating a given water
quality standard with a known deficit over a specified length of the
stream environment.
Keywords: dissolved oxygen, biochemical oxygen demand,
Monte Carlo simulation, first-order uncertainty analysis, risk
assessment, Streeter-Phelps equations, probability distributions.
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