# Estimation of Directional Spectra by ML/ME-Methods

*The paper discusses the statistical Maximum Likelihood (ML) and Entropy (ME) methods for estimation of directional wave spectra. A combined ML/ME method is derived, and a reduced version...*

Decay of Random Waves on Non-Monotonic Profiles

*A model is presented to calculate the decay of random waves in the surf zone with special focus on non-monotonic profiles. A wave-by-wave approach is employed to derive a model that requires...*

Propagation of Linear Gravity Waves Over Slowly Varying Depth and Currents

*A detailed derivation of some kinematic and dynamic properties linear surface gravity waves-current interaction. The obtained expressions, which are exact within the framework of linear...*

Comparisons of Directional Wave Analysis Methods

*Four methods analysing directional wave spectrum were testes and compared through numerical simulation. The four methods are (i) the truncated Fourier series (TFS), (ii) the Longuet-Higgins...*

Numerical Modeling of Waves in Harbors

*The numerical wave model HARBD has been used extensively for estimating waves in harbors. The model is used to simulate laboratory tests of long waves in a rectangular harbor with variable...*

Nonlinear Effects on Wave Envelope and Phase

*The representation of second-order random waves is examined in terms of the effect of second-order nonlinearities on the wave envelope and phase. Theoretical expressions describing the...*

Modeling Bottom Friction in Wind-Wave Models

*Effects of bottom friction in wind-wave models are investigated, with an emphasis on wave-induced bottom roughnesses (moveable-bed effects). A state-of-the-art bottom friction model is...*

Spectral Boussinesq Modelling of Breaking Waves

*Random waves passing over a shallow bar are considered, in particular the amplification of bound harmonics in shoaling water, their subsequent release in deepening water, and the role...*

Optimization of the Design and Operation of Soil Vapor Extraction Systems

*Volatile organic compounds (VOC's) immobilized within the soil unsaturated zone constitute a significant source of groundwater contamination. Soil vapor extraction systems (SVES's), which...*

Modeling Temperature Impacts on Salmon Survival

*Among research goals at the University of California-Davis are the development and application of mathematical models to study water quality impacts on threatened and endangered species....*

A Physically Based Conceptual Model for Simulating Contaminant Levels in Subsurface Water

*A conceptual physical model is developed to simulate solute transport and mixing in the vadose (unsaturated) and groundwater zones. The conceptual model couples lumped-parameters models...*

Optimal Operation of Soil Aquifer Treatment System

*Mathematical models based on nonlinear programming are developed for operating soil aquifer treatment(SAT) systems. The objective of these optimization models is to determine the operation...*

Willingness-to-Pay for Alternative Shortage Probability Distributions

*Mathematical programming is used to derive estimates of the willingness-to-pay of water service customers for improvements in water supply reliability. Reliability is represented as a...*

Economic Impacts of Severe and Sustained Drought

*A hydrologic-economic-legal impact model shows that a severe and sustained drought in the Colorado River Basin would cause acute economic damages to most instream water users, and to upper...*

Stochastic Optimal Control for Determination of Freshwater Inflows to Estuaries

*The objective of the research is to develop estuarine system management models based upon discrete-time stochastic optimal control. An analytical feedback control law is given. The control...*

Summer Engineering Outreach Program for Native Americans

*Minorities are significantly underrepresented in engineering, science and math fields in the United States. To attract and retain capable minority students will require the development...*

The Efficiency of Source Terms in Performance Assessments for Salt Repositories

Long-Term Effects of Neutron Absorber and Fuel Matrix Corrosion on Criticality

Modeling Infiltration Into a Tuff Matrix From a Saturated Vertical Fracture

Liquid Infiltration Through the Boiling-Point Isotherm in a Desiccating Fractured Rock Matrix

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