Search
Now showing items 1-10 of 12
Applicability of Kinematic, Noninertia, and Quasi-Steady Dynamic Wave Models to Unsteady Flow Routing
Publisher: American Society of Civil Engineers
Abstract: Propagation of flood waves in an open channel can be mathematically approximated by the Saint-Venant equations (dynamic wave) or by their simplifications including the kinematic wave, noninertia wave, gravity wave, and ...
Evaluation of Probabilistic Point Estimate Methods in Uncertainty Analysis for Environmental Engineering Applications
Publisher: American Society of Civil Engineers
Abstract: This paper begins with a comprehensive review of various point estimate methods, with an emphasis on their differences and similarities in theory and application. The Rosenblueth probabilistic point estimate method is a ...
Application of Hilbert-Huang Transform Method for Analyzing Toxic Concentrations in the Niagara River
Publisher: American Society of Civil Engineers
Abstract: A novel application of the Hilbert-Huang transform (HHT) method for the analysis of nonstationary and nonlinear time series is proposed in this paper. The HHT is introduced to the field of water quality analysis both to ...
Uncertainty Analysis and Risk Assessment of DO Concentrations in the Buffalo River Using the Perturbance Moments Method
Publisher: American Society of Civil Engineers
Abstract: A three-point approximation method, the perturbance moments method (PMM), is applied to quantify the uncertainty of predicted dissolved oxygen (DO) concentrations in the Buffalo River that arise from data variability and ...
Stochastic Partial Differential Equation-Based Model for Suspended Sediment Transport in Surface Water Flows
Publisher: American Society of Civil Engineers
Abstract: A stochastic partial differential equation-based model has been derived based on the law of mass conservation and the Langevin equation of particle displacement to simulate suspended sediment transport in open-channel ...
Incorporating Reliability into the Definition of the Margin of Safety in Total Maximum Daily Load Calculations
Publisher: American Society of Civil Engineers
Abstract: In the calculation of the total maximum daily load (TMDL), the margin of safety (MOS) is an attempt to account for the uncertainties related to the conceptual representation of the system and the inherently random nature ...
Discrete-Time Markov Chain Model for Transport of Mixed-Size Sediment Particles under Unsteady Flow Conditions
Publisher: American Society of Civil Engineers
Three-State Continuous-Time Markov Chain Model for Mixed-Size Sediment Particle Transport
Publisher: American Society of Civil Engineers
Abstract: In this study, transport of mixed-size sediment particles under steady flow is described using the continuous-time Markov process. The continuous behavior of particle movement among the immobile bed material, bedload, and ...
Shallow Water Wave Propagation in Convectively Accelerating Open-Channel Flow Induced by the Tailwater Effect
Publisher: American Society of Civil Engineers
Abstract: Propagation of shallow water waves in viscous open-channel flows that are convectively accelerating or decelerating under gradually varying water surface profiles is theoretically investigated. Issues related to the ...
Quantifying the Uncertainty Associated with Estimating Sediment Concentrations in Open Channel Flows Using the Stochastic Particle Tracking Method
Publisher: American Society of Civil Engineers
Abstract: Suspended sediment concentrations are typically estimated using either the advection-diffusion equation or sediment rating curves in a deterministic manner. This study attempts to develop a stochastic approach for quantifying ...