• ERDC researcher earns patent for high performance photocatalytic material

    Dr. Emily Asenath-Smith's determination to develop low energy solutions to remediate water led her to develop U.S. Patent No. 11,298,689, awarded April 12, 2022, for “Multi-spectral photocatalytic compounds.”
  • Two LRD teammates awarded FY22 Financial Managers of the Year

    On Tuesday, June 28, USACE Deputy Director of Resource Management Col. Rodney Gibson announced that not one, but two members from the Great Lakes and Ohio River Division Resource Management team were selected for FY 2022 USACE Financial Manager of the Year Awards.
  • Knarr assumes command of USACE Little Rock District

    Col. Damon M. Knarr assumes command of the U.S. Army Corps of Engineers Little Rock District during a July 12 ceremony at the Robinson Center in downtown Little Rock.
  • Savings lead to SAVE Award for Middle East District

    Value methodology is a process that analyzes the different parts of a project, product, or process to ensure an optimal balance among factors such as cost, time, and safety according to the Society of American Value Engineering (SAVE). Although value engineering is not unique to USACE, every USACE district incorporates value engineering processes into their work. It’s not only mandated by law but has proven again and again to achieve the best results for both the Corps and its mission partners. In fact, USACE has gotten so good at the VE process that they recently won six out of the eight awards presented at a SAVE summit in June of this year.
  • A Tutorial on the Rapid Distortion Theory Model for Unidirectional, Plane Shearing of Homogeneous Turbulence

    Abstract: The theory of near-surface atmospheric wind noise is largely predicated on assuming turbulence is homogeneous and isotropic. For high turbulent wavenumbers, this is a fairly reasonable approximation, though it can introduce non-negligible errors in shear flows. Recent near-surface measurements of atmospheric turbulence suggest that anisotropic turbulence can be adequately modeled by rapid-distortion theory (RDT), which can serve as a natural extension of wind noise theory. Here, a solution for the RDT equations of unidirectional plane shearing of homogeneous turbulence is reproduced. It is assumed that the time-varying velocity spectral tensor can be made stationary by substituting an eddy-lifetime parameter in place of time. General and particular RDT evolution equations for stochastic increments are derived in detail. Analytical solutions for the RDT evolution equation, with and without an effective eddy viscosity, are given. An alternative expression for the eddy-lifetime parameter is shown. The turbulence kinetic energy budget is examined for RDT. Predictions by RDT are shown for velocity (co)variances, one-dimensional streamwise spectra, length scales, and the second invariant of the anisotropy tensor of the moments of velocity. The RDT prediction of the second invariant for the velocity anisotropy tensor is shown to agree better with direct numerical simulations than previously reported.
  • Historic building to be removed from Illinois Waterway Project Office site

    In early August, the U.S. Army Corps of Engineers, Rock Island District, will dispose of a building identified as a contributing element to the Illinois Waterway Project Office, which is listed on the National Register of Historic Places. The building, located at 257 Grant Street in Peoria, Illinois, is no longer structurally sound and repairs are not feasible. Demolition and disposal of the building has been coordinated with the Illinois State Historic Preservation Office in accordance with Section 106 of the National Historic Preservation Act.
  • Corps to host meeting with landowners for the Western Everglades Restoration Project

    The U.S. Army Corps of Engineers, Jacksonville District and the South Florida Water Management District will host a follow-up meeting with interested landowners regarding the Western Everglades Restoration Project (WERP) on August 10, 2022.
  • Relief well installation project substantially complete

    A Memphis District Project Delivery Team recently completed work to construct 25 new relief wells in Scott County, Missouri. To execute the project, a contract for $1,630,303.15 was awarded to VuCon, LLC., in August 2018. The contract was administered by the Memphis District’s Caruthersville Area Office, and the job was declared substantially complete June 24, 2022.
  • Boronic Acid Functionalized Ferrocene Derivatives Towards Fluoride Sensing

    Abstract: In this technical report (TR), a robust, readily synthesized molecule with a ferrocene core appended with one or two boronic acid moieties was designed, synthesized, and used toward F- (free fluoride) detection. Through Lewis acid-base interactions, the boronic acid derivatives are capable of binding with F- in an aqueous solution via ligand exchange reaction and is specific to fluoride ion. Fluoride binding to ferrocene causes significant changes in fluorescence or electrochemical responses that can be monitored with field-portable instrumentation at concentrations below the WHO recommended limit. The F- binding interaction was further monitored via proton nuclear magnetic resonance spectroscopy (1H-NMR). In addition, fluorescent spectroscopy of the boronic acid moiety and electrochemical monitoring of the ferrocene moiety will allow detection and estimation of F- concentration precisely in a solution matrix. The current work shows lower detection limit (LOD) of ~15 µM (285 μg/L) which is below the WHO standards. Preliminary computational calculations showed the boronic acid moieties attached to the ferrocene core interacted with the fluoride ion. Also, the ionization diagrams indicate the amides and the boronic acid groups can be ionized forming strong ionic interactions with fluoride ions in addition to hydrogen bonding interactions.
  • More than just inspections: IG office provides oversight, assistance across Army Corps of Engineers

    Each year, the commanding general of the Army Corps directs the IG office to conduct inspections on various topics. This year, the IG office is inspecting logistics, the telework program, and human resources support for military members.