scholarly journals Three-dimensional contaminant plume dynamics in the vadose zone: Simulation of the 241-T-106 single-shell tank leak at Hanford

1990 ◽  
Author(s):  
J.L. Smoot ◽  
B. Sagar
Keyword(s):  
Vadose Zone ◽  
Three Dimensional ◽  
Contaminant Plume ◽  
Plume Dynamics ◽  
Single Shell

scholarly journals Three-dimensional modeling of nitrate-N transport in vadose zone: Roles of soil heterogeneity and groundwater flux

2018 ◽  
Vol 211 ◽  
pp. 15-25 ◽  
Author(s):  
Simin Akbariyeh ◽  
Shannon Bartelt-Hunt ◽  
Daniel Snow ◽  
Xu Li ◽  
Zhenghong Tang ◽  
...  
Keyword(s):  
Vadose Zone ◽  
Three Dimensional ◽  
Soil Heterogeneity ◽  
Three Dimensional Modeling ◽  
Groundwater Flux ◽  
Dimensional Modeling ◽  
Nitrate N

scholarly journals A Decentralized Framework for Parameter and State Estimation of Infiltration Processes

Mathematics ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 681
Author(s):  
Song Bo ◽  
Jinfeng Liu
Keyword(s):  
Parameter Estimation ◽  
State Estimation ◽  
Vadose Zone ◽  
Three Dimensional ◽  
Water Dynamics ◽  
Richards Equation ◽  
Soil Water Dynamics ◽  
Decentralized Estimation ◽  
Gravitational Forces ◽  
Estimation Scheme

The Richards’ equation is widely used in the modeling soil water dynamics driven by the capillary and gravitational forces in the vadose zone. Its state and parameter estimation based on field soil moisture measurements is important and challenging for field applications of the Richards’ equation. In this work, we consider simultaneous state and parameter estimation of systems described by the three dimensional Richards’ equation with multiple types of soil. Based on a study on the interaction between subsystems, we propose to use decentralized estimation schemes to reduce the complexity of the estimation problem. Guidelines for subsystem decomposition are discussed and a decentralized estimation scheme developed in the framework of moving horizon state estimation is proposed. Extensive simulation results are presented to show the performance of the proposed decentralized approach.

scholarly journals Characterization of Direct Push Vadose Zone Sediments from the 241-U Single-Shell Tank Farm

2007 ◽  
Author(s):  
Christopher F. Brown ◽  
Michelle M. Valenta ◽  
R. Jeffrey Serne ◽  
Bruce N. Bjornstad ◽  
David C. Lanigan ◽  
...  
Keyword(s):  
Vadose Zone ◽  
Direct Push ◽  
Tank Farm ◽  
Single Shell

Three-Dimensional Characterization of Contaminant Plumes

1996 ◽  
Vol 1526 (1) ◽  
pp. 177-182 ◽  
Author(s):  
Norman L. Jones ◽  
R. Jeffrey Davis
Keyword(s):  
Data Clustering ◽  
Three Dimensional ◽  
Gridded Data ◽  
Contaminant Plume ◽  
Interpolation Scheme ◽  
Contaminant Plumes ◽  
Simple Set ◽  
A Site ◽  
Contaminated Area

Before remediation of a site with contaminated soil or groundwater, the contaminant plume must first be characterized. This involves sampling the contaminant concentration at a set of locations in and around the contaminated area. To present the measured concentrations in a meaningful form, the concentrations are typically interpolated to the nodes of a three-dimensional grid, and the plume is visualized by constructing iso-surfaces from the gridded data. The critical step in this process is the interpolation stage. Improper application of an interpolation scheme can result in grossly misleading three-dimensional plume maps. There are a number of problems that often occur when interpolating contaminant plume data, including generation of negative concentrations, oscillation of interpolated values, improper estimation of maximum concentrations, and skewing of the results due to data clustering. These and other difficulties associated with plume characterization are discussed, along with a simple set of guidelines for detecting and overcoming these problems.

scholarly journals Geochemical Processes Data Package for the Vadose Zone in the Single-Shell Tank Waste Management Areas at the Hanford Site

2007 ◽  
Author(s):  
Kirk J. Cantrell ◽  
John M. Zachara ◽  
P. Evan Dresel ◽  
Kenneth M. Krupka ◽  
R. Jeffrey Serne
Keyword(s):  
Waste Management ◽  
Vadose Zone ◽  
Geochemical Processes ◽  
Hanford Site ◽  
Single Shell ◽  
Tank Waste
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