Browsing Civil Engineering by Issue Date
Now showing items 1-20 of 254
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Theory and High-Resolution Finite Element Analysis of 2-D and 3-D Effective Permeabilities in Strongly Heterogeneous Porous media"
(Computational Mechanics Pub, 1992)Starting from the premise that Darcy's law applies with a random hydraulic conductivity field K(x) defined on a support ω, we consider steady state flow in a larger domain Ω driven by statistically independent random source ... -
Effective Hydraulic Conductivity of Bounded, Strongly Heterogeneous Porous Media
(American Geophysical Union, 1996)We develop analytical expressions for the effective hydraulic conductivity Ke of a three‐dimensional, heterogeneous porous medium in the presence of randomly prescribed head and flux boundaries. The log hydraulic conductivity ... -
Analytical model for intersection sight distance on 3-d highway alignments
(Transportation Research Board of the National Academies, 1996)Intersection sight distance is the adequate sight distance to be provided at two-way stop controIIed intersection. Current AASHTO poIicy provides an equation and charts for the required at-grade intersection sight distance ... -
Multiple decision-making criteria in the transport and burial of hazardous and radioactive wastes
(Springer-Verlag, 1999)We evaluate the application of various statistical measures for the identification of optimal financial strategies in environmental projects that may be burdened by the consequences of low-probability, high-cost events. ... -
Assessing Risk Retention Strategies for Environmental Project Management
(Geo science world, 1999)Environmental companies face the risk of liability claims that can, significantly, affect their resources and financial future. At the same time most small- and medium-sized companies do not rely on sophisticated risk-management ... -
Environmental risk and liability management and its influence on profitability
(Wiley online library, 1999)Managing environmental risk and liability for corporations and consultants requires a prudent combination of insurance techniques, company risk control plans, pollution prevention, and the proper allocation of retention ... -
Working Interest Optimization in the Transport and Burial of Hazardous Wastes
(Willey Blackwell, 2000)One of the major concerns decision makers face in deciding whether to accept a contract for transport and burial of hazardous wastes is whether there will be spillage during transportation and/or leakage after burial, both ... -
Numerical Estimation of Effective Hydraulic Conductivity in Leaky Heterogeneous Aquitards
(Geo science world, 2000-01-01)We perform high-resolution Monte Carlo simulations to study steady-state flow in three-dimensional leaky heterogeneous aquitards. The vertical extend of the aquitards is finite, and constant-mean head boundaries apply in ... -
Optimal involvement in multiple environmental projects under budgetary constraints
(Springer, 2000-11)Environmental companies bidding on multiple projects are presented with the opportunity for diversification in several areas of the environmental market but, also, with the risk of exposure to uncertain events that can ... -
Environmental Concerns: Catastrophic Events and Insurance
(Springer, 2002)With ongoing reduction of engagement of public authorities in infrastructure development, private companies have to consider their responsibility in the case of catastrophic events, i.e. they must be aware of, and be able ... -
Subsurface Flow and Transport: A Stochastic Approach,
(2002)This book describes a major method in modeling the flow of water and transport of solutes in the subsurface, a subject of considerable interest in the exploitation and preservation of water resources. The stochastic approach ... -
Option Coverage Techniques for Environmental Projects
(American Society of Civil Engineers, 2002-01-01)Environmental firms are faced both with the prospect of liability claims that may arise long after activities at a project have been completed and the impact of catastrophic events that can severely threaten a firm’s ... -
Control Function Measures for Hydrodynamic Problems
(Plenum Publishers, 2002-04)This short paper shows that different choices made for control functions of information in hydrodynamic flow problems can have significant implications for interpretations of the system. Using as a simple illustration the ... -
Infiltration in Stratified, Heterogeneous Soils: Relative Importance of Parameters and Model Variations
(Willey, 2002-11-13)This study presents a framework that accounts for the uncertainty, relative importance, and relative contribution of uncertain and spatially variable parameters and the influence of statistical model assumptions in problems ... -
Stochastic Methods for Flow in Porous Media: Coping with Uncertainties
(Elsevier, 2003)This volume systematically introduces a number of stochastic methods used by researchers in the community in a tutorial way and presents methodologies for spatially and temporally stationary as well as nonstationary flows. ... -
Resource allocation in environmental projects under uncertain physical and economic conditions
(Geo Sciecne world, 2003-03-01)This article advocates the idea for a rationale allocation of resources to reduce the physical and economic uncertainties that dominate the performance of an environmental project through the integration of scientific and ... -
Limiting Risk in Environmental Problems:Corporate Budget Constraints and Minimum Involvement
(Geo Sciecne world, 2003-06-01)For a given opportunity in which a company can invest to perform environmental remediation for profit, the influences of value, cost, success probability, and corporate risk tolerance provide an optimal working interest ... -
Analysis of process controls in land surface hydrological cycle over the continental United States
(Wiley Online Library, 2004)The paper uses two years (1997–1999) of data from the North American Land Data Assimilation System at National Centers for Environmental Prediction to analyze the variability of physical variables contributing to the ... -
Numerical investigation of the anisotropic hydraulic conductivity behavior in heterogeneous porous media.
(Springer, 2004-06)The behavior of the mean equivalent hydraulic conductivity normal and parallel to stratification (K1, and K2, respectively) is studied here through Monte Carlo simulations of three-dimensional, steady-state flow in ... -
Groundwater Modeling of a Complex Hydrologic System in South Carolina Through the Use of Analytic Elements
(Springer, 2004-07)The objective of this study is to evaluate the use of the Analytical Element Method (AEM) toward multiobjective, multiscale, ongoing modeling needs at complex hydrologic sites such as those managed by the US Department of ...