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Reliability-based Approach to Groundwater Remediation Design

Reliability-based Approach to Groundwater Remediation Design
Author: Jejung Lee
Publisher:
Total Pages:
Release: 2001
Genre:
ISBN:

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Two-dimensional and three-dimensional steady state groundwater flow and transient contaminant transport models are used to demonstrate this approach. By the reliability index analysis, the probability of success for several design alternatives including pump-and-treat methods and a no action treatment relying on the natural attenuation are quantitatively compared. The impact of additional sampling on the performance reliability also is evaluated. The reliability analysis shows that the reliability of design performance depends on both the uncertainty of the geological and hydrological model and the impact of this uncertainty on the performance model.


Least-Cost Groundwater Remediation Design Using Uncertain Hydrogeological Information

Least-Cost Groundwater Remediation Design Using Uncertain Hydrogeological Information
Author:
Publisher:
Total Pages: 5
Release: 2000
Genre:
ISBN:

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The main objective of this research is to develop a computer code that will facilitate design of robust risk based pump and treat groundwater remediation and management systems. The resulting systems will operate under both gradient and concentration constraints. The design is a least cost design. The element of risk in the remediation design considered in this work is that due to the uncertainty in the hydraulic conductivity of the contaminated aquifer in question. Considerable work has been done in the field of optimal groundwater remediation and management design. Existent design algorithms depend upon the reliability of the groundwater flow and transport models to predict the movement of contamination in a given aquifer. The reliability of these mathematical models is, in turn, dependent upon variables that describe the physical attributes of the aquifer in question. The hydraulic conductivity of the aquifer is the most influential of the state variables that are used to de scribe groundwater flow and transport. Many models assume the hydraulic conductivity is known with certainty. However, field data shows that the hydraulic conductivity is uncertain An immediate goal of this research is to successfully apply a new method of optimization to incorporate uncertainty in hydraulic conductivity into the groundwater remediation design subject to gradient and concentration constraints. In doing this, a new method of sampling uncertainty distributions has been formulated and successfully implemented. A new method of solving nonconvex optimization problems has also been successfully developed and applied. This method, called the tunneling method, is an efficient technique for solving optimization problems where multiple interior local minimum values exist in the feasible region (3). The results of this work provide a tool to create cost-effective design-risk-based groundwater-management systems.


Remediation Engineering

Remediation Engineering
Author: Suthan S. Suthersan
Publisher: CRC Press
Total Pages: 628
Release: 2016-11-25
Genre: Science
ISBN: 1498773362

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"This second edition of Remediation Engineering will continue to be the seminal handbook that regulators must have on-hand to address any of the remediation issues they are grappling with daily. The book is wide-ranging, but specific enough to address any environmental remediation challenge." —Patricia Reyes, Interstate Technology Regulatory Council, Washington, DC, USA "This book offers the researcher, teacher, practitioner, student, and regulator with state-of-the-art advances in conducting site investigations and remediation for common and emerging contaminants. It is revolutionary in its approach to conducting subsurface investigation, which greatly influences a successful and appropriate response in assessing and addressing environmental risk. This book is a giant leap forward in understanding how contaminates behave and how to reduce risk to acceptable levels in the natural world." —Daniel T. Rogers, Amsted Industries Incorporated, Chicago, Illinois, USA "This text is a superb reference and a good tool for learning about state-of-the-art techniques in remediation of soil and groundwater. [It] will become a ready reference at many companies as the engineering community creates increased value from remediation efforts around the world." —John Waites, AVX Corporation, Fountain Inn, South Carolina, USA Remediation Engineering was first published in 1996 and quickly became the go-to reference for a relatively young industry, offering the first comprehensive look at the state-of-the-science in treatment technologies of the time and the contaminants they applied to. This fully updated Second Edition will capture the fundamental advancements that have taken place during the last two decades within all the subdisciplines that form the foundation of the remediation engineering platform. It covers the entire spectrum of current technologies that are employed in the industry and also discusses future trends and how practitioners should anticipate and adapt to those needs. Features: Shares the latest paradigms in remediation design approach and contaminant hydrogeology Presents the landscape of new and emerging contaminants Details the current state of the practice for both conventional technologies, such as sparging and venting Examines newer technologies such as dynamic groundwater recirculation and injection-based remedies to address both organic and inorganic contaminants. Describes the advances in site characterization concepts such as smart investigations and digital conceptual site models. Includes all-new color photographs and figures.


Risk, Reliability and Sustainable Remediation in the Field of Civil and Environmental Engineering

Risk, Reliability and Sustainable Remediation in the Field of Civil and Environmental Engineering
Author: Thendiyath Roshni
Publisher: Elsevier
Total Pages: 554
Release: 2022-03-22
Genre: Technology & Engineering
ISBN: 0323856993

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Risk, Reliability and Sustainable Remediation in the Field of Civil and Environmental Engineering illustrates the concepts of risk, reliability analysis, its estimation, and the decisions leading to sustainable development in the field of civil and environmental engineering. The book provides key ideas on risks in performance failure and structural failures of all processes involved in civil and environmental systems, evaluates reliability, and discusses the implications of measurable indicators of sustainability in important aspects of multitude of civil engineering projects. It will help practitioners become familiar with tolerances in design parameters, uncertainties in the environment, and applications in civil and environmental systems. Furthermore, the book emphasizes the importance of risks involved in design and planning stages and covers reliability techniques to discover and remove the potential failures to achieve a sustainable development. Contains relevant theory and practice related to risk, reliability and sustainability in the field of civil and environment engineering Gives firsthand experience of new tools to integrate existing artificial intelligence models with large information obtained from different sources Provides engineering solutions that have a positive impact on sustainability


Integrated Characterization and Optimization Approach for Groundwater Engineering Systems

Integrated Characterization and Optimization Approach for Groundwater Engineering Systems
Author: Jonghyun Lee
Publisher:
Total Pages:
Release: 2014
Genre:
ISBN:

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As the reliability of water supply is threatened by climate change, increasing demand and potential contamination, sustainable management of groundwater resources is more important than ever. The current crisis calls for the development of a systematic and integrated management approach that employs a predictive modeling of complex subsurface physical, chemical and biological processes, utilizes a large volume of hydrogeological and geophysical measurements for accurate subsurface characterization, quantifies uncertainty regarding model prediction, and makes a series of optimal decisions for economic and reliable aquifer management plans. In this dissertation, I make contributions in three important topics, which are pivotal components of integrated groundwater resources management: groundwater flow modeling tailored for managed aquifer recharge and recovery, subsurface characterization methods using various types of measurements, and dual control strategy for remediation design. First, variably saturated groundwater flow modeling with a commercial software, FEFLOW, is presented especially designed for managed aquifer recharge and recovery (MAR) projects. This modeling approach is then used to design and construct an intermediate-scale laboratory aquifer at the Center for Experiment Study of Subsurface Environmental Processes at Colorado School of Mines, Colorado, which aims at testing and validating an integrated sensor-based MAR management framework. Next, a computationally efficient stochastic inversion approach, Principal Component Geostatistical Approach, is introduced to characterize large-scale subsurface properties with various types of measurements. Then, a novel subsurface characterization method, Bayesian total variation inversion approach, is developed with an emphasis on the discrete geologic feature identification. Lastly, an integrated simulation-optimization program tool, Stochastic Cost Optimization Toolkit (SCOTOOLKIT), is applied for the reliable and cost-efficient remediation plans to a DNAPL contaminated area at a U.S. Air Force Base in Dover, Delaware.