Operations Research, Systems Engineering and Industrial Engineering Commons^™

Reduced Recharge Capacity Of A Pump And Treat System, Cynthia L. Teeter, Douglas Gunnison, Norman R. Francingues, Mark E. Zappi

United States Army: Publications

The North Boundary treatment system at Rocky Mountain Arsenal (RMA), Commerce City, Colorado, involves pumping of contaminated groundwater from an unconfined aquifer from one side of a soil-bentonite (SB) slurry wall to three pulsed-bed activated carbon adsorbers and prefilter and postfilter systems. The treated water is injected into the unconfined aquifer on the other side of the slurry wall via 38 recharge wells and 15 recharge trenches, collectively referred to as the recharge system. Recharge capacity of the recharge system has declined over time, limiting the operating capacity of the system. Two probable causes for reduction of the recharge systems …

Design Of Pneumatic Diffuser System, Steven C. Wilhelms, Charles W. Downer, Richard E. Price

United States Army: Publications

During non-generation periods, leakage through the wicket gates of a hydroturbine often results in very poor quality water (low or zero dissolved oxygen) in the tailrace of the hydropower facility. Generally, the leakage rate is relatively small, usually about 5-10 cfs per turbine. A bottom-mounted diffuser system was designed based on laboratory-measured and manufacturer-supplied specifications about the gas transfer characteristics of the bubble plume generated by an 11- inch flexible head diffuser. The design criteria and the overall effectiveness of the system were evaluated in field tests at Lake Eufaula, Oklahoma. The analysis of field data is reported herein.

Treatment Of Contaminated Groundwater Using Chemical Oxidation, Mark E. Zappi, Beth C. Fleming, M. John Cullinane

United States Army: Publications

Chemical oxidation was evaluated for treatment of a groundwater contaminated with trichloroethylene, acetone, and other organic compounds as measured by the biochemical oxygen demand (BOD) test. Results indicated that maximum contaminant removal was obtained using a combination of hydrogen peroxide, high intensity ultraviolet light, and the addition of tungsten trioxide under acidic conditions.

Verification Techniques Used In Modeling Charleston Harbor, South Carolina, Samuel B. Heltzel

United States Army: Publications

Verification to field data provides a means to assess a model's ability to reproduce behavior of the natural system being modeled. Often neither time nor funds are available to collect extensive sets of field data, and alternate techniques are required. This study used the results of a laterally averaged model to provide limited verification for a two-dimensional depthaveraged hydrodynamic and sediment model.

This numerical model investigation used the US Army Corps of Engineers TABS-MD numerical modeling system for open channel flow and sedimentation. Boundary conditions and a verification data set were obtained from the laterally averaged numerical model FIne-Grained Bed …

Properties Of Solidified/Stabilized Chromium Contaminated Soil, Beth C. Fleming, M. John Cullinane, Jr

United States Army: Publications

Solidification/stabilization (S/S) of chromium contaminated soils is influenced by the oxidation state of the chromium. The sum of the hexavalent chromium and trivalent chromium represent the total chromium concentration which is used to determine whether the soil meets the criteria for chromium in the Toxicity Characteristic Leaching Procedure (TCLP) or whether the levels of chromium in applicable extractions are below the drinking water standard. Hexavalent chromium is the more mobile form of chromium and also the more toxic.
Seven vendors and the U.S. Army Engineer Waterways Experiment Station (WES) evaluated SIS treatment of chromium contaminated soils collected from a Superfund …

Flow Impingement Velocities, Snake River, Wyoming, Stephen T. Maynord

United States Army: Publications

Flow impingement, which occurs when approach channels direct flow into a bank line at large acute angles, results in flow concentration along bank lines, which creates large forces on bank material or bank protection. As part of studies conducted to determine the required riprap size for impinged flow, velocities were measured on the Snake River near Jackson, Wyoming. High velocities and steep water-surface slopes were observed at each impingement site.

Revised Hydraulic Design Of The Los Angeles County Flood Control System, Michael E. Mulvihill, Scott E. Stonestreet

United States Army: Publications

The US Army Engineer District, Los Angeles, recently completed a study regarding the adequacy of an existing flood control system in Los Angeles County. Results of this study indicate that the level of protection afforded by the system is as low as 25-year in heavily urbanized areas. The Corps of Engineers plans to increase the capacity in two mainstem channels, raising the level of protection to greater than 1OO-year, by constructing parapet walls on top of existing levees and modifying constrictive bridges. A physical model study will be conducted to aid in analysis of complex design problems and will provide …

Levee/Floodwall Freeboard Design For An Urban Flood Control Project, Daniel B. Pridal, Edward F. Sing

United States Army: Publications

A methodology for the design of levee/floodwall freeboard using evolving guidelines based on the concept of superiority is presented. A case study illustrating the application of the freeboard design guidelines to the Truckee Meadows Project is shown. The Truckee Meadows Project provides a 100 year level of flood protection through the Reno-Sparks, Nevada metropolitan area along an approximate ten mile reach of the Truckee River. Major features of the project include levees, floodwalls, channel modifications, bridge replacement or reconstruction, a detention basin, and drainage improvements. The project is presently in the Preconstruction, Engineering and Design (PED) Phase within the Sacramento …

Removal Of Extremely Low Levels Of Munitions In A Drinking Water Supply, R. Mark Bricka, Wayne Sharp

United States Army: Publications

Past military operations have resulted in the contamination of soils by chemical munitions such as RDX, HMX and TNT (contaminant description, page 2) . The migration of water through the soils can transport the contaminants into groundwater and contaminate drinking water sources . Many military munitions are known or suspected to be carcinogenic and, therefore, must be removed from drinking water .

Analyses Of Special Hazards And Flooding Problems In Tropical Island Environments, Robert C. Macarthur, Douglas L. Hamilton, Michael D. Harvey, Hudson W. Kekaula

United States Army: Publications

Data and results summarized in this paper show that development of urban projects and design of flood control works in tropical island catchments must consider clear water flooding as well as special hazards such as landslides, flow bulking, high sediment concentrations, mud and debris flows and flow avulsions. The needs for and methods to estimate peak flows, event volumes and the potential extent and depths of flooding during severe storm events in urbanizing tropical environments are described.

Contaminant Groundwater Interception - Rma, S. Paul Miller, William L. Murphy

United States Army: Publications

Resolution of groundwater contamination is the major environmental concern at most contamination sites. At some sites immediate control is required to prevent further damage. This paper describes a pioneer groundwater interception and treatment system developed and evaluated at a major Army installation.

Grab Samplers For Benthic Macroinvertebrates In The Lower Mississippi River, C. Rex Bingham, David B. Mathis, Larry G. Sanders, Eva Mclemore

United States Army: Publications

Data from 24 grab samples, eight each taken with the Standard Ponar, Petite Ponar, and Shipek grabs from a backwater habitat were statistically compared using one-way analysis of variance. Total grabs produced 5696 organisms and 24 distinct taxa. Results showed no difference in catch efficiency among grab samplers for distinct taxa, total densities, and densities of the dominant taxa: Lirceus sp., Ilyodrilus templetoni, Hexagenia sp., Limnodrilus cervix, Limnodrilus hoffmeisteri, Sphaerium sp., and immature Ilyodrilus. The Petite Ponar grab captured significantly fewer immature Limnodrilus. This was attributed to clumped distribution of these worms rather than difference …

Guide To The Preparation Of Military Reports Of A Technical Nature, The Engineer School, Fort Belvoir, Virginia, Robert L. Bolin Depositor

United States Army: Publications

This is a brief text prepared for instructional purposes at the US Army Engineer School at Fort Belvoir, VA.

The manuscript covering the preparation of a technical report has been prepared for two reasons: first, to serve as a basic text for instructing student officers in the techniques of report writing and second, to serve as a means of reference. Student officers cannot be expected to retain in their minds all the minute details of report writing to which they are exposed during their period of school training. Considerable time may elapse after graduation and before they are called on …

Intelligence Sections In The Offices Of Chiefs Of Arms And Services (Ag 321.19mid 6 Sept. 1940), Emory S. Adams

United States Army: Publications

This document consists of a memorandum instructing senior staff officers in the headquarters of the War Department to set up intelligence sections in their offices. Those senior Army staff officers included the Chief of the Air Corps, the Chief of the Chemical Warfare Service, the Chief of Engineers, the Chief of Ordnance, the Chief Signal Officer , the Quartermaster General, and the Surgeon General. Also included are a “Distribution Sheet” showing who copies were sent to and a letter from the National Archives forwarding the memorandum to Robert L. Bolin.

The memorandum was a charter for organizations that grew into …