| Numerical Model Study of the Tuscarawas River below Dover Dam, Ohio |
Sep-2009 |
58 pages |
| Authors:
Richard L Stockstill; Jane M Vaughan; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
 | The U.S. Army Corps of Engineers, Huntington District (LRH) has been charged with upgrading Dover Dam to meet hydrologic design standards and address stability issues. The LRH requested that the U. S. Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory (CHL), evaluate the flow conditions in the Tuscarawas River downstream of Dover Dam as part of a safety assurance program. The two-dimensional depth-averaged module of the Adaptive Hydraulics ... |
|
| Hydraulic Tomography and High-Resolution Slug Testing to Determine Hydraulic Conductivity Distributions - Year 3 |
DEC 2007 |
58 pages |
| Authors:
Carl D. McElwee; Rick Devlin; Brian Wachter; KANSAS UNIV LAWRENCE DEPT OF GEOLOGY
|
| A typical method used to determine fluid behavior in a geologic matrix near a well is a pumping test Here a pump is installed into a well and groundwater is removed or injected while water levels in surrounding observation wells are monitored. Then the aquifer parameters can be estimated by monitoring changes in water levels at observation wells at some distance These types of tests are typically large in scale, ... |
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| A GSSHA Model of the Perris Basin of the San Jacinto River Watershed, Riverside County, California |
JUN 2007 |
13 pages |
| Authors:
Moira T. Fong; Charles W. Downer; Aaron R. Byrd; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| This Coastal and Hydraulics Engineering Technical Note (CHETN) summarizes the results of the development and calibration of a Gridded Surface/Subsurface Hydrologic Analysis (GSSHA) (Downer et al 2005) model of the northwest region of the San Jacinto River Basin in Riverside County, CA, by the U.S. Army Engineer Research and Development Center (ERDC), in collaboration with The U.S. Army Engineer District, Los Angeles. |
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| Evaluation of Delft3D Performance in Nearshore Flows |
28 DEC 2006 |
27 pages |
| Authors:
Y. L. Hsu; James D. Dykes; Richard A. Allard; James M. Kaihatu; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The Delft3D modeling system, developed by Delft Hydraulics (www.wldelft.nl) is capable of simulating hydrodynamic processes due to waves, tides, rivers, winds, and coastal currents. It can be used to provide surf prediction for areas with complicated bathymetry where the use of a one-dimensional surf model is inappropriate. Delft3D has many model options and free parameters. The main objective of this investigation is to examine the effects of these selections on ... |
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| Predicting Sediment Transport Dynamics in Ephemeral Channels: A Review of Literature |
SEP 2006 |
9 pages |
| Authors:
Stephen H. Scott; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| The goal of this Coastal and Hydraulics Engineering Technical Note (CHETN) is to evaluate state-of-the-art research efforts concerning predicting sediment transport in desert ephemeral channels. The present day methods used to predict sediment transport were primarily formulated for application to perennial flow channels. Additionally, in the development of sediment transport relationships it is assumed that the sediment and water mixture is Newtonian, i.e., a linear relationship exists between the shear ... |
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| Application of the SAM Computer Program for Truckee River Stable Channel Analysis |
SEP 2006 |
15 pages |
| Authors:
Stephen H. Scott; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| The purpose of this Coastal and Hydraulics Engineering Technical Note (CHETN) is to demonstrate the utility of the SAM computer programs for evaluating the stability of a stream restoration design on the Truckee River. SAM is an integrated system of computer programs developed under the Flood Damage Reduction and Stream Restoration Research Program sponsored by the U.S. Army Corps of Engineers (USACE 2000). These programs are designed to satisfy the ... |
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| Geotextile Tube Structures Guidelines for Contract Specifications |
SEP 2006 |
15 pages |
| Authors:
Doyle L. Jones; Jack E. Davis; William R. Curtis; Cheryl E. Pollock; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| This Coastal and Hydraulics Engineering Technical Note (CHETN) provides an example set of contract specifications for the construction of sediment-filled geotextile tube structures. This technical note represents the state of practice within the U.S. Army Corps of Engineers and is an update of the material published in Wetlands Research Program Technical Note WG-RS- 3.2, January 1999 (Davis and Landin 1999). While the example presented here can be used as a ... |
|
| Modeling Free-Surface Flow Over a Weir |
AUG 2006 |
12 pages |
| Authors:
Richard Stockstill; Christopher Kees; Charlie Berger; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| This Coastal and Hydraulics Engineering Technical Note (CHETN) investigates the ability of a modeling scheme to compute not only the flow variables (pressure and velocity), but also the location of the free surface. The free-surface scheme is implemented in the three dimensional (3-D) Navier-Stokes module of the Adaptive Hydraulics (ADH) code and provides a means to model free-surface flow over a hydraulic structure. A review of existing methods of free-surface ... |
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| Hydraulic Design of Channels Conveying Supercritical Flow |
JUL 2006 |
40 pages |
| Authors:
Richard L. Stockstill; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| This is a review of the Hydrologic Criteria and Drainage Design Manual (Clark County Regional Flood Control District 1999) of the Clark County Regional Flood Control District (CCRFCD). Areas of needed research relative to channels conveying supercritical flow and corresponding channel appurtenances have been identified. The extension of features common to supercritical channel flow is presented. A case is made that extension of hydraulic design guidance of supercritical confluences (trapezoidal ... |
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| ADH Sediment Module Testing |
JUN 2006 |
15 pages |
| Authors:
Jennifer N. Tate; R. C. Berger; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The Kate Aubrey reach of the Mississippi River, located north of Memphis, TN, was used as a test domain for the ADaptive Hydraulics (ADH) sediment transport routines. This 27.4 km (17-mile) stretch of river experiences times of wetting and drying and contains several nonerodable dike structures and revetments. This reach is a good test condition for a model since there are two dike configurations in its history, one that did ... |
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| Hydraulic Geometry Analysis of the Lower Mississippi River |
28 OCT 2005 |
93 pages |
| Authors:
Philip J. Soar; Colin R. Thorne; Oliver P. Harmar; JBA CONSULTING ATHERSTONE (UNITED KINGDOM)
|
| The hydraulic geometry of the Lower Mississippi River is primarily the product of the action of natural flows acting on the floodplain materials over centuries and millennia to form an alluvial forming a channel. However, the modern channel has been modified by engineered channel improvements performed as part of the Mississippi River and Tributaries (MR&T) project. Channel improvement features include meander cutoffs, levees, diversion structures, bank stabilization, and low training ... |
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| Long Term Performance Assessment of a Permeable Reactive Barrier at Former Naval AITR Station Moffett Field |
JUL 2005 |
37 pages |
| Authors:
A. Gavaskar; W. S. Yoon; J. Sminchak; B. Sass; N. Gupta; J. Hicks; V. Lal; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| The primary objective of this report is to describe the results of the last round of monitoring conducted in July 2004, their relationship to the results of pervious rounds, and their implications for the longevity and hydraulic performance of the permeable reactive barrier (PRB). |
|
| Civil Works Operations & Maintenance Management Tools Research Program: Program Summary FY 2000 - FY 2002 |
JAN 2005 |
220 pages |
| Authors:
David T. Mckay; Stuart D. Foltz; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| The purpose of the Civil Works O&M Tools research and development program was to develop new decision support tools and improve old ones that could remove a degree of subjectivity from the business of developing and executing the O&M program. The products would help managers not so much by making decisions for them but by providing a structured basis of objectivity and fact as a platform to support decisions where ... |
|
| Unsteady Storm Drainage Modeling Within the U.S. Army Corps of Engineers GSSHA Model |
2004 |
95 pages |
| Authors:
Fred L. Ogden; CONNECTICUT UNIV STORRS OFFICE FOR SPONSORED PROGRAMS
|
| The ability to specifically simulate unsteady hydraulics in subsurface storm and tile drains was included in the formulation of the Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model. Simulations were performed to determine model sensitivity to parameters, and the hydrologic significance of subsurface drains. |
|
| Ice Engineering: Progress in Evaluating Surface Coatings for Icing Control at Corps Hydraulic Structures |
OCT 2003 |
9 pages |
| Authors:
Nathan D. Mulherin; Robert B. Haehnel; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
|
| Removal of accreted ice during the winter at Corps hydropower and navigation projects is time-consuming, costly, and sometimes hazardous. Annual maintenance costs incurred at Corps of Engineers projects as a result of ice problems were estimated by Haynes et al. (1993) to be $33 million in 1992 (Fig. 1). A previous issue of Ice Engineering (Haehnel 2002) described an ongoing icing research program at the Cold Regions Research and Engineering ... |
|
| Spreadsheet Accumulator Sizing for Hybrid Hydraulic Applications Using the Benedict-Webb-Rubin Equation of State |
SEP 2003 |
15 pages |
| Authors:
Wesley Bylsma; ARMY TANK-AUTOMOTIVE AND ARMAMENTS COMMAND WARREN MI
|
| A simple and effective method using optimization with the Benedict- Webb-Rubin equation of state is presented to size accumlator volumes in hyvrid hydraulic applications given the pre-charge, minimum and maximum operating pressures. |
|
| Determining the Stratification of Exchange Flows in Sea Straits |
2003 |
|
| Authors:
Lawrence J. Pratt; Karl R. Helfrich; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF PHYSICAL OCEANOGRAPHY
|
 | Our long-term goal is to contribute to the understanding of the dynamics and stratification of exchange flows such as in the Bab al Mandab and to understand the consequences for the circulation in the neighboring basins and/or marginal seas. One of the original objectives of the proposed work is to understand the effect of critical level mixing on the dynamics and stratification of sill flows. In particular, what happens when ... |
|
| Cost and Performance Report - Evaluating the Longevity and Hydraulic Performance of Permeable Reactive Barriers at Department of Defense Sites |
01 DEC 2002 |
70 pages |
| Authors:
Arun Gavaskar; Bruce Sass; Neeraj Gupta; Eric Drescher; Woong-Sang Yoon; BATTELLE MEMORIAL INST COLUMBUS OH
|
| The U.S. Department of Defense (DOD) Strategic Environmental Research and Development Program (SERDP) and Environmental Security Technology Certification Program (ESTCP) sponsored a project to assess performance and longevity issues at DOD permeable reactive barrier (PRIB) sites. The goal of this project was to evaluate short- and long-term performance issues associated with permeable reactive barriers (PRBs) installed at several United States Department of Defense (DoD) sites, A PRB is a passive, ... |
|
| Ice Engineering Facility (Ice Engineering. Number 34, August 2002) |
AUG 2002 |
5 pages |
| Authors:
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| The Ice Engineering Facility (IEF) is a unique hydraulic research facility located at the Cold Regions Research and Engineering Laboratory (CRREL) in Hanover, New Hampshire part of the Corps of Engineers' Engineer Research and Development Center (ERDC). IEF houses the coldrooms for sophisticated modeling of hydraulic processes in cold regions. The design and opening philosophy of the facility is to provide system flexibility for maximum capability in solving cold regions ... |
|
| Bluestone Lake Dam, West Virginia, Rating Curve and Overtopping Study |
MAR 2002 |
192 pages |
| Authors:
Billy D. Fuller; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICSLAB
|
| Experiments were conducted on a 1:65 scale model of the Bluestone Lake Dam located on the New River in West Virginia. The model was constructed to evaluate proposed structural modifications to increase the discharge capacity of the dam. |
|
| Hydraulic Properties of the Hemopump HP31: A Study of the Downstream Pressure Distribution |
25 OCT 2001 |
|
| Authors:
M. Grigioni; A. Carotti; C. Daniele; U. Morbiducci; C. D. Gaudio; ISTITUTO SUPERIORE DI SANITA ROME (ITALY) LAB OF BIOMEDICAL ENGINEERING
|
| The Hemopump was commercialized as an useful tool for the left ventricle assistance. Bioengineers and clinicians showed great interest to develop applications and to analyze its hydraulic behaviour; in this work an application for axial pump in different conditions is presented. A study of the spatial pressure distribution generated by the impeller of the Hemopump is investigated in highly accurate steady-flow conditions. The experimental set up adopted for this study ... |
|
| Hydraulic Design of Stream Restoration Projects |
SEP 2001 |
172 pages |
| Authors:
Ronald R. Copeland; Dinah N. McComas; Colin R. Thorne; Philip J. Soar; Meg M. Jonas; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICSLAB
|
| This document provides a systematic hydraulic design methodology to aid hydraulic engineers in the design of stream restoration projects. The objective is to achieve a channel design that fits into the natural system within the physical constraints imposed by other project objectives. In the Corps of Engineers, stream restoration projects are frequently associated with or part of a flood-control project. Thus, projects have more than one objective and compromises may ... |
|
| Performance Characteristics of a Rapidly Installed Breakwater System |
JUL 2001 |
250 pages |
| Authors:
Michael J. Briggs; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICSLAB
|
| This dissertation describes an integrated study of analytical, numerical, laboratory, and field modeling efforts to quantify the performance and response of a new type of rapidly installed breakwater system (RIBS) being developed at the U.S. Army Engineer Research and Development Center's (ERDC) coastal and Hydraulics Laboratory (CHL), located in Vicksburg, MS. RIB is a floating breakwater with two legs in a 'V' shape in plan view which provide a sheltered ... |
|
| Investigation on a Semi-Active Hydro Mount Using Mr Fluid# |
JUN 2001 |
10 pages |
| Authors:
R. Ay; M. F. Golnaraghi; A. Khajepour; WATERLOO UNIV (ONTARIO) DEPT OF MECHANICAL ENGINEERING
|
| Hydraulic engine mounts (hydro mounts) are passive devices used to isolate automobile engine vibration from the chassis at different automobile operating conditions. In this paper we introduce a semi-active hydro mount using Magneto Rheologic (MR) fluids. A semi- active hydro mount can be used to optimize the mount performance for a wider range of vehicle operating conditions. The MR fluid mount developed and mathematically modeled in this work can change ... |
|
| HyPAS User's Manual: A Hydraulic Processes Analysis System. An Extension for ArcView GIS, Version 4.0.1 |
JAN 2001 |
44 pages |
| Authors:
Thad C. Pratt; Daryl S. Cook; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICSLAB
|
| Modern electronic instrumentation produces large amounts of data. Often, this abundance of data is not fully utilized because the engineer or scientist does not have an effective way to visualize and analyze it within project time schedule. This problem can be minimized by a set of tools that provides ready capability to visualize, analyze, reduce, and efficiently plot data obtained from such instrumentation. Additionally, such a tool can take advantage ... |
|
| Determination of Resistance Due to Shrubs and Woody Vegetation |
OCT 2000 |
63 pages |
| Authors:
Gary E. Freeman; William H. Rahmeyer; Ronald R. Copeland; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICSLAB
|
| Flume studies were conducted to determine hydraulic resistance of flexible plants that deform with turbulent flow. Both partially submerged and fully submerged plants were studied. The flexible stems and varying shapes of a plant leaf mass greatly complicate the understanding of resistance. The deformation of plant shape with flow precludes the use of constant blockage or plant density in predicting resistance. This study considers the ... |
|
| New McAlpine Lock Flling and Emptying System, Ohio River, Kentucky Hydraulic Model Investigation |
SEP 2000 |
114 pages |
| Authors:
John E. Hite Jr; ARMY ENGINEER DISTRICT LOUISVILLE KY
|
| Navigation improvements at McAlpine Locks and Dam on the Ohio River include construction of another 365.76-m-(1,200-fl-) long lock chamber adjacent to the existing lock chamber. A previous model investigation of an in-chamber longitudinal culvert filling and emptying system (ILCS) with through-the-sill intakes and outlets revealed the ILCS design was feasible. The intake and outlet designs were changed and another model study, reported herein, was conducted to evaluate the hydraulic performance ... |
|
| Workshop on Standardizing Hydroacoustic Methods of Estimating Fish Passage for Lower Columbia River Dams |
SEP 2000 |
206 pages |
| Authors:
Gene R. Ploskey; Deborah S. Patterson; Carl R. Schilt; Michael E. Hanks; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
| The U. S. Army Engineer District, Portland, funded this research to evaluate possibilities for standardizing hydroacoustic methods for estimating fish passage through U. S. Army Corps of Engineers dams on the lower Columbia River, Washington and Oregon. The effort included this standardization workshop involving experts with fixed-aspect hydroacoustics, statistics, or fish passage. The goal of the workshop was to increase the consistency and comparability of ... |
|
| Robert Manning (A Historical Perspective) |
APR 2000 |
4 pages |
| Authors:
Craig Fischenich; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
|
| Lower Snake River Juvenile Salmon Migration Feasibility Report/ Environmental Impact Statement Appendix F, Hydrology/Hydraulics and Sedimentation |
DEC 1999 |
123 pages |
| Authors:
CORPS OF ENGINEERS WALLA WALLA WA WALLA WALLA DISTRICT
|
| The Corps of Engineers along with the Bonneville Power Administration, U.S. Environmental Protection Agency, and U.S. Bureau of Reclamation as cooperating agencies, analyzed four general alternatives intended to provide information on the technical, environmental, and economic effects of actions related to improving juvenile salmon passage. The four alternatives include Alternative (1) Existing Conditions (the no-action alternative) and three different ways to further improve juvenile salmon passage. The action alternatives are: ... |
|
| Evaluating 1 and 2D Dimensional Models for Floodplain Inundation Mapping |
SEP 1999 |
39 pages |
| Authors:
Malcom G. Anderson; Christopher N. Smith; Paul D. Bates; BRISTOL UNIV (UNITED KINGDOM) SCHOOL OF GEOGRAPHICAL SCIENCES
|
| The aim of this project is to undertake a feasibility study into the potential utility of integrating high resolution two dimensional finite element flow models and Geographical Information Systems technology. The initial phase of this research concerns the construction of an operational high resolution flow model for a 60km reach of the Missouri River between Gavins Point Dam and Maskell gauging station. Specifically, the contract seeks to produce a CRREL ... |
|
| Technology Evaluation Report for the NoVOCs(Trademark) Technology Evaluation Superfund Innovative Technology Evaluation Program. Volume II: appendix B: Hydrogeologic Investigation of the Aquifer Treated by the NoVOCs(Trademark) System |
SEP 1999 |
212 pages |
| Authors:
TETRA TECH INC SAN DIEGO CA
|
| In support of the U.S. Environmental Protection Agency (EPA) superfund Innovative Technology Evaluation (SITE) Program, Tetra Tech EM Inc. (Tetra Tech) is evaluating the MACTEC Inc. (MACTEC) NoVOCsTM in-well volatile organic compound (VOC) stripping system at Installation Restoration (IR) Site 9 at Naval Air Station (NAS) North Island in San Diego, California. The NoVOCs(Trademark) system is a patented recirculating well that is designed for the in situ remediation of groundwater ... |
|
| Hydraulic Evaluation of Discharge Over Submerged Rock Wing Dams on the Upper Mississippi River |
AUG 1999 |
5 pages |
| Authors:
Jon S. Hendrickson; Michelle J. Schneider; CORPS OF ENGINEERS ST PAUL MN ST PAUL DISTRICT
|
| This technical note presents prototype data and equations for predicting discharge over the top of submerged wing dams. This analysis was part of a study, done through the Corps of Engineers' Land Management System, to determine the impacts of zebra mussels on water quality and ecological conditions in the Upper Mississippi River (UMR). Wing dams (also called spur dikes) are rock structures constructed perpendicular to the flow direction in a ... |
|
| CRREL Ice Jam Database |
FEB 1999 |
24 pages |
| Authors:
Kathleen D. White; Heidi J. Eames; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| This report provides information on the CRREL Ice Jam Database and its potential use for analyzing ice-related flooding problems. Rivers in the northern United States are subject to ice jams that cause flooding; block hydropower and water supply intakes; delay or stop navigation; damage riverine structures such as locks, dams, bridges, dikes, levees, and wingwalls; and decrease downstream discharge. The lack of readily available information on historical ice events hinders ... |
|
| User's Manual for LOCKSIM: Hydraulic Simulation of Navigation Lock Filling and Emptying Systems |
JAN 1999 |
191 pages |
| Authors:
Gerald A. Schohl; TENNESSEE VALLEY AUTHORITY NORRIS
|
| LOCKSIM (LOCK SIMulator) is a numerical model for simulation of one- dimensional transient filling and emptying flow in navigation locks. Part I of this user's manual describes the application of LOCKSIM to navigation locks and provides two detailed example applications. Part II provides detailed descriptions for operating LOCKSIM, interpreting its output, and specifying its input. LOCKSIM was designed as a general-purpose simulator, applicable to nearly any type of filling and ... |
|
| Estimated Hydraulic Properties for the Surficial - and Bedrock-Aquifer System, Meddybemps, Maine |
1999 |
33 pages |
| Authors:
Forest P. Lyford; Stephen P. Garabedian; Bruce P. Hansen; DEPARTMENT OF THE INTERIOR WASHINGTON DC
|
| Analytical and numerical-modeling methods were used to estimate hydraulic properties of the aquifer system underlying the Eastern Surplus Company Superfund Site in Meddybemps, Maine. Estimates of hydraulic properties are needed to evaluate pathways for contaminants in ground water and to support evaluation and selection of remediation measures for contaminated ground water at this site. |
|
| Time-Dependent Stratified Flow Over Topography: Waves and Rotating Hydraulics |
31 DEC 1998 |
|
| Authors:
Karl R. Helfrich; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| This grant has supported study in the general area of time-dependent rotating hydraulics and nonlinear waves. Two recent projects have been completed. The first is a study of the fully nonlinear dam break problem in a rotating channel. One focus of this work has been to study of the characteristics and dynamics of the shocks and bores. The second project is an extension of Long's classic problem of upstream influence ... |
|
| Evaluation of Infrasound and Strobe Lights for Redistributing Migrant Salmon Smolts in the McNary Juvenile Bypass: 1997 |
DEC 1998 |
32 pages |
| Authors:
Peter N. Johnson; Gene R. Ploskey; ASCI CORP VICKSBURG MS
|
| We assessed the use of infrasound and strobe lights for redistributing yearling and subyearling migrant salmonids away from dewatering screens in the McNary Juvenile Bypass System. Infrasound signals were generated using two devices: a pump with a rotary valve and reciprocating pistons. We evaluated the former device operating at 20 Hz in spring based upon differences in mean counts of migrant smolts across the channel during hourly sound%-on and sound-off ... |
|
| Hydraulic Test Loop for Nonflammable Hydraulic Fluid |
SEP 1998 |
52 pages |
| Authors:
William E. Likos; SOUTHWEST RESEARCH INST SAN ANTONIO TXTARDEC FUELS AND LUBRICANTS RESEARCH FACILITY
|
| A test stand was constructed to evaluate the suitability of the non- flammable hydraulic fluid, chlorotrifluoroethylene (CTFE) for Army applications. The test loop consists primarily of stainless steel and elastomers suited to the CTFE fluid. A 150-hp electric motor, capable of speeds from 0 to 1800 rpm drives a 40 gpm, 4500 psi, variable displacement hydraulic pump. The test apparatus features a "bootstrap" reservoir that utilizes the output ... |
|
| Hydroacoustic Evaluations of Juvenile Salmonid Passage at Bonneville Dam Including Surface-Collection Simulations |
APR 1998 |
200 pages |
| Authors:
Gene R. Ploskey; Peter N. Johnson; William T. Nagy; Mike G. Burczynski; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| Ths technical report describes results of studies conducted by the U. S. Army Engineer District, Portland, and the U.S. Army Engineer Waterways Experiment Station to resolve critical uncertainties in the implementation of surface-collector technologies and the estimation of Fish Passage Efficiency (FPE) for juvenile salmon at the Bonneville Project. The goals of this study were to (a) provide biological information necessary to facilitate the design and placement of a surface-collector ... |
|
| Hydraulic Impacts of Riparian Vegetation; Summary of the Literature |
MAY 97 |
63 pages |
| Authors:
J. C. Fischenich; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
|
| Healthy riparian vegetation tends to stabilize streambanks, provides shade that prevents excessive water temperature fluctuations, performs a vital role in nutrient cycling and water quality, improves aesthetic and recreational benefits of a site, and is immensely productive as wildlife habitat. This report summarizes existing techniques for the prediction of resistance coefficients associated with riparian vegetation. |
|
| Future Needs in Wetland Hydrology and Hydraulics |
MAR 1997 |
6 pages |
| Authors:
Jack Davis; Raymond Walton; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| This Technical Note identifies future research needs for improving the predictive capability of the Wetlands Dynamic Water Budget Model (WDWBM) for computer simulations of wetland hydrology and hydraulics. The WDWBM was based on a number of models in common use and incorporates many of these models' theories and approaches. An underlying objective was to keep the model relatively simple and efficient, so that it could simulate year-to-year variations. While many ... |
|
| Wetlands Dynamic Water Budget Model |
MAR 1997 |
7 pages |
| Authors:
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| The hydraulic and hydrologic characteristics of a wetland influence all wetland functions, and consequently are of primary importance in evaluating these functions. The processes by which water is introduced to, temporarily stored in, and removed from a wetland are commonly known as the "water budget." A Wetlands Dynamic Water Budget Model (WDWBM) has been developed through the Wetlands Research Program (WRP) at the U.S. Army Engineer Waterways Experiment Station to ... |
|
| New Criteria to Reduce Project Costs |
JAN 97 |
12 pages |
| Authors:
Fred E. Camfield; COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS
|
| Laboratory investigations were recently conducted at the U.S. Army Engineer Waterways Experiment Station (WES) Coastal and Hydraulics Laboratory (CHL) to improve design criteria for selectively placed armor stone on coastal structures to reduce the cost of future construction. Present field practice is to place quarrystone armor units to provide the best fit obtainable for particular site conditions. The selective placement of quarrystones one at a time to achieve the best ... |
|
| Debris Control at Hydraulic Structures, Contract Modification: Management of Woody Debris in Natural Channels and at Hydraulic Structures |
NOV 96 |
59 pages |
| Authors:
N. Wallerstein; C. R. Thorne; S. Abt; NOTTINGHAM UNIV (UNITED KINGDOM) DEPT OF GEOGRAPHY
|
| This report contains a compilation of results and conclusions from four research projects assessing the impact of Large Woody Debris (LWD) on channel geomorphology in the Yazoo Basin, Northern Mississippi, and the impact and control of LWD at hydraulic structures. The long-term aim of this research is an improved understanding of the basin-wide impact of LWD dynamics in unstable and stable channel environments, the development of coherent basin-wide debris management ... |
|
| Equipment for Contaminated Sediment Dredging |
SEP 96 |
95 pages |
| Authors:
Trimbak M. Parchure; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB
|
| Under the research program entitled Improvement of Operations and Maintenance Techniques (IOMT), a survey of portable hydraulic dredges was undertaken at the Hydraulics Laboratory of Waterways Experiment Station, Vicksburg, MS. Technical Report HL-83-4 (Clark 1983) was published on this study in March 1983. Under the program Dredging Operations Technical Support (DOTS), the guidance provided in the earlier Technical Report was updated and expanded in order to address the aspect of ... |
|
| Bibliography on Tidal Hydraulics. Supplement No. 11. Supplementary Material, Compiled from June 1986 to June 1995. Tidal Flows in Rivers and Harbors |
AUG 96 |
264 pages |
| Authors:
COMMITTEE ON TIDAL HYDRAULICS (ARMY) WASHINGTON DC
|
| CONTENTS: Theoretical Considerations; Sedimentation; Salinity Effects; Contamination; Regulation and Improvement; Modeling and Other Laboratory Experiments; Surveys and Instruments; and Basic Physical Data. |
|
| Hydraulic Impulse Speargun. |
17 JUN 1996 |
16 pages |
| Authors:
Laurent Bissonnette; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A hydraulic speargun has an elongated elastomeric bladder for charging the gun. One end of the bladder selectively communicates with the breech chamber at the end of the gun barrel. The other end of the bladder is connected to a pump for inflating the bladder with water under pressure. A plug and dart assembly is breech loaded into the barrel. A trigger opens a valve to release the water pressure ... |
|
| Status of HEC Next Generation Software Development Project |
JUN 1996 |
31 pages |
| Authors:
Darryl Davis; Arlen Feldman; Mike Burnham; John Peters; Gary Brunner; HYDROLOGIC ENGINEERING CENTER DAVIS CA
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| This document consists of four papers which were presented at a special session of the American Society of Civil Engineers' North American Water and Environment Congress, June 1996, in Anaheim, California. The papers summarize the current status of the U.S. Army Corps of Engineers Hydrologic Engineering Center's (HEC) 'Next Generation (NexGen) Software Development Project'. The NexGen project is both a change to the modern windows, graphic- user-interface, computer environment and ... |
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| Bridge Hydraulic Analysis with HEC-RAS |
APR 96 |
22 pages |
| Authors:
Vernon Bonner; Gary Brunner; HYDROLOGIC ENGINEERING CENTER DAVIS CA
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| The Hydrologic Engineering Center (HEC) is developing next generation software for one-dimensional river hydraulics. The HEC-RAS River Analysis System is intended to be the successor the current steady-flow HEC-2 Water Surface Profiles Program as well as provide unsteady flow, sediment transport, and hydraulic design capabilities in the future. A common data representation of a river network and bridge data is used by all modeling methods. This paper presents the bridge ... |
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