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A Probabilistic Comparative Study of Various Base Isolation Systems?Nonstationary Earthquake Excitation
A probabilistic comparative study of various base isolation systems is carried out. The laminated rubber bearing with and without lead plug, the resilient-friction, and the EDF base isolation...

Reliability of Daniels-Systems Oscillators Including Dynamic Redistribution
The reliability of redundant systems under stationary Gaussian white noise excitation is investigated with emphasis on the dynamics of redistribution of internal forces after brittle failure...

Effect of Air Gap on Platform Reliability
A simplified reliability study of the effect of lateral wave forces impacting the deck of a fixed platform is presented. The reliability of the deck legs, considered the primary resistance...

Rainflow Cycles in Nonstationary Gaussian Processes
This paper develops a methodology for calculating the probability distribution for rainflow cycles in a nonstationary Gaussian process. The up- and downcrossing rates are estimated for...

Parameter Identification in Markov Damage Models
This paper is concerned with the identification of parameters in cumulative damage processes whose underlying statistics are Markov. We consider the problem of parameter estimation during...

Expert Systems for Drought Management: A Case Study
This paper describes the development and application of a computer model used by the Seattle Water Department (SWD) for operations during drought. This model provides guidance for initiating...

Assessing WQ Impacts Using a Hydraulic Model
Engineering projects may cause water quality impacts in estuarine systems. It is important to assess those impacts during the planning phase of the project so that mitigation measures...

Modeling Hydrologic Components of the Upper St. Johns River Project
Off-line stormwater management areas and riverine marsh conservation areas are the major components of the Upper St. Johns River Project, Florida. Dimensions and operations of these components...

Modeling Water Supply Benefits of a Shallow Lake in a River Reach
Minimum flow and level requirements based on ecological, water quality, recreation and other needs are established and used as limiting criteria in the development of a riverine lake as...

Sanitary Sewer Model with Database Management
While numerous water supply and stormwater system models existed, the few sanitary sewer models that were readily available were too simplistic for engineering design and master planning...

Sanitary Sewer System Modeling for Operation and Planning
Development of a Steady State Sanitary Sewer Simulation (S⁵) computer model helped Newport News, Virginia, enact an efficient sanitary sewer management...

Computer-Aided Wastewater Master Planning
Computerized wastewater collection system modeling is a tool now used by city planners and engineers to efficiently and accurately analyze present and future conditions. Once a model has...

Mass Transport Modeling of Pearl Harbor
The U.S. Navy is planning to implement the use of organotin antifouling paints into the fleet. Such paints are already in use by commercial vessels and private pleasure crafts. As part...

Spreadsheet Applications in Water Quality Management
The state regulatory environment requires simple, quick, easy to use and maintain water quality analysis tools. Therefore, for the evaluation of toxic substances, a new approach towards...

Revising a Reservoir Rule Curve for Multiple Uses
The Jackson Hydroelectric Project generates power, supplies municipal water, provides flood control, maintains anadromous fishery minimum instream flows and studies various reservoir rule...

Reservoir Safe Yield Evaluation Using Simulation
The safe yield available from surface water impoundments serving the City of Portsmouth, Virginia, was evaluated, and the sensitivity of the reservoir system to several factors was investigated....

Stochastic Model for the Management of a Stream-Aquifer System
The management of a system of groundwater and surface water requires that the hydraulic connection of the two sources be investigated. The inherent uncertainties that exist in the data,...

Conjunctive Use Study of Groundwater and Surface Water in Chino Basin, California
The purpose of this paper is to study the effects of artificial recharge on an already contaminated unconfined aquifer and propose optimal recharging and pumping schemes to prevent the...

Water Distribution Systems Analysis Package
A computer software package for water distribution systems analysis has been developed for the city of Fort Worth, Texas, to overcome the problems of time consumption and human error,...

Water Distribution Network Calibration Considering Multiple Loading Conditions
Through time a water distribution network's carrying capacity is reduced as material collects on pipe walls. The impact varies with each pipe in the system and occurs at an...

 

 

 

 

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