scholarly journals MODAL GRAIN SIZE EVOLUTION AS IT RELATES TO THE DREDGING AND PLACEMENT PROCESS - GALVESTON ISLAND, TEXAS

2020 ◽  
pp. 7
Author(s):  
Coraggio Maglio ◽  
Himangshu Das ◽  
Frederick Fenner
Keyword(s):  
Local Community ◽  
Settling Velocity ◽  
Army Corps ◽  
Army Corps Of Engineers ◽  
Engineer Research ◽  
Beach Sediment ◽  
Fine Sediments ◽  
Size Evolution ◽  
Return Channel ◽  
Development Center

During the fall and winter of 2015, a beneficial-use of dredged material project taking material from the Galveston Entrance Channel and placing it on a severely eroded beach of Galveston Island was conducted. This material was estimated to have 38percent fines. This operation was conducted again in the fall of 2019 and monitored for estimation of the loss of fines, changes in compaction and color from the dredging source to the beach. The local community and state funded the incremental cost at approximately $8 a cubic yard in 2015, and $10.5 a cubic yard in 2019 to have this material pumped to the beach. The projects were closely monitored by the U.S. Army Corps of Engineers (USACE) Engineer Research and Development Center (ERDC) and the USACE Galveston District. The data from this placement project was used to calculate and better understand the loss of fines during the dredging and placement process as well as aid in the generation of an empirical formula to estimate the loss of fine sediments during dredging and beach placement. This formula takes into account: losses due to dredging equipment operations, slope of the effluent return channel at the beach, sediment settling velocity, and sorting parameter.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/VQ36upT2iQo

scholarly journals Brunswick Harbor numerical model

2021 ◽  
Author(s):  
Jennifer McAlpin ◽  
Jason Lavecchia
Keyword(s):  
Army Corps ◽  
Army Corps Of Engineers ◽  
Engineer Research ◽  
Corps Of Engineers ◽  
Us Army ◽  
Navigation Channel ◽  
The Us ◽  
Model Setup ◽  
Hydraulics Laboratory ◽  
Development Center

The Brunswick area consists of many acres of estuarine and marsh environments. The US Army Corps of Engineers District, Savannah, requested that the US Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory, develop a validated Adaptive Hydraulics model and assist in using it to perform hydrodynamic modeling of proposed navigation channel modifications. The modeling results are necessary to provide data for ship simulation. The model setup and validation are presented here.

scholarly journals A bathymetric study of the forebay at the Old River Low Sill Structure from 1963 to 2019

2021 ◽  
Author(s):  
Julie Kelley ◽  
Joseph Dunbar ◽  
Maureen Corcoran
Keyword(s):  
Research And Development ◽  
New Orleans ◽  
Army Corps ◽  
Army Corps Of Engineers ◽  
Engineer Research ◽  
Corps Of Engineers ◽  
Development Center ◽  
Bathymetric Changes ◽  
The U.S

The purpose of this study is to use historical hydrographic surveys to quantify bathymetric changes in the forebay channel area of ORLSS over the last 56 yr. The results from this comparison support an ongoing geotechnical study led by Mr. Lucas Walshire, U.S. Engineer Research and Development Center (ERDC), for the U.S. Army Corps of Engineers, New Orleans District (USACE MVN).

scholarly journals Mobile Harbor, Alabama navigation study : ship simulation report

2021 ◽  
Author(s):  
Morgan Johnston ◽  
Sung-Chan Kim ◽  
Mary Allison
Keyword(s):  
Army Corps ◽  
Mobile Bay ◽  
Army Corps Of Engineers ◽  
Engineer Research ◽  
Corps Of Engineers ◽  
Us Army ◽  
Mobile Harbor ◽  
The Us ◽  
Cargo Capacity ◽  
Development Center

Mobile Bay is a large estuary located in the southwest corner of Alabama, which connects to the Gulf of Mexico. Mobile Harbor contains the only port in the state that supports ocean-going vessels. Some of the larger vessels calling on the port experience transit delays and limited cargo capacity, so a study was conducted by the US Army Corps of Engineers, Mobile District (CESAM), and the Alabama State Port Authority to investigate channel improvements. In 2017, the US Army Engineer Research and Development Center (ERDC) assisted CESAM in screening proposed deepening and widening alternatives in Mobile Bay by completing a Feasibility Level Ship Simulation (FLSS) study using the ERDC Ship/Tow Simulator. These lower-resolution databases from the FLSS study were used as a foundation to complete a more robust navigation study in 2020 to test the proposed modifications to Mobile Harbor. During this study, three main areas were focused on: a bend easing, a passing lane, and a turning basin. Testing of the proposed design was evaluated over the course of 2 weeks with eight pilots. Assessment of the proposed modifications was accomplished through analysis of ship simulations completed by experienced local pilots, discussions, track plots, run sheets, and final pilot surveys.

Recent Efforts on Blast Damage Mitigation for Dams

2011 ◽  
Vol 82 ◽  
pp. 428-433 ◽  
Author(s):  
Michael K. Sharp ◽  
Yazmin Seda-Sanabria ◽  
Enrique E. Matheu
Keyword(s):  
Homeland Security ◽  
Collaborative Research ◽  
Army Corps ◽  
Army Corps Of Engineers ◽  
Department Of Homeland Security ◽  
Protective Measures ◽  
Damage Prediction ◽  
Blast Damage ◽  
Development Center ◽  
The U.S

This paper describes collaborative research efforts conducted between the U.S. Army Corps of Engineers (USACE) and the U.S. Department of Homeland Security (DHS). The USACE, through its U.S. Army Engineer Research and Development Center (ERDC), has focused efforts on the development of a collaborative research program to address technical gaps related to risk and blast mitigation for dams. These research efforts involve experimental and analytical tasks designed to improve blast damage prediction capabilities for dams, navigation locks, and levee systems resulting from vehicle and waterborne delivery scenarios. The outcomes from these efforts can inform USACE’s priorities, which include refining the current understanding of the effects of potential attacks, the vulnerabilities and weaknesses of its critical assets to various threat conditions, and the local and regional consequences of those attacks in order to develop appropriate protective measures and recovery technologies.

scholarly journals TRACING ESTUARINE SEDIMENTS BY NEUTRON ACTIVATION

1976 ◽  
Vol 1 (15) ◽  
pp. 116
Author(s):  
Richard M. Ecker ◽  
John F. Sustar ◽  
William T. Harvey
Keyword(s):  
San Francisco ◽  
Research Laboratory ◽  
Estuarine Sediments ◽  
Disposal Site ◽  
Army Corps ◽  
Army Corps Of Engineers ◽  
Corps Of Engineers ◽  
Stanford Research Institute ◽  
Fine Sediments ◽  
The U.S

Tracing the movement of dredged sediments in north San Francisco Bay was accomplished jointly by the San Francisco District of the U.S. Army Corps of Engineers, Explosive Excavation Research Laboratory (now the Explosive Effects Division of the Weapon Effects Laboratory, U.S. Army Waterways Experiment Station), and the Stanford Research Institute. The study involved developing a technique which would permit the longterm tracing of fine sediments dredged from Mare Island Strait after disposal at the Carquinez Strait disposal site; application of the tracer; disposal of the tagged sediment for the February-March 1974 dredging of Mare Island Strait; sampling bottom sediments throughout the study area for a 10-month period; and, quantitative analysis of the collected samples.

scholarly journals Experiments on settling column to determine the settling velocity of cohesive sediments

2015 ◽  
Vol 18 (3) ◽  
pp. 19-28
Author(s):  
Trung Vinh Bao Nguyen ◽  
Phuoc Luong Hong Vo
Keyword(s):  
Settling Velocity ◽  
Research Area ◽  
Cohesive Sediment ◽  
Ho Chi Minh City ◽  
Army Corps ◽  
Cohesive Sediments ◽  
Army Corps Of Engineers ◽  
High Concentration ◽  
Environmental Laboratory ◽  
Settling Column

In order to get the accurate settling velocity of cohesive sediments, experiments on site are required. However, in the reality, this task is very difficult to be realized. The study presents a method including three step to determine the settling velocity of the sediment in laboratory conditions. Firstly, design and build up an experiment on settling column based on the design of The Environmental Laboratory, U.S Army Corps of Engineers. Secondly, do the experiments with different cases such as in standards, with salinities, in high concentration, etc. to determine the settling velocity of sand and silt. Thirdly, determine the settling velocity of cohesive sediment in Nang Hai area, Can Gio (Ho Chi Minh City) in the laboratory. In addition, using the result to determine the characteristic coefficients a, b, m, n, and to establish the empirical formula for the settling velocity in the research area.

Study on Settling Efficiency of Sedimentation Basin of Coca Codo Sinclair Hydropower Station in Ecuador

2012 ◽  
Vol 238 ◽  
pp. 298-303
Author(s):  
Xuan Ying Guo ◽  
Song Wei Chen ◽  
Dong Po Sun
Keyword(s):  
South America ◽  
United States Army ◽  
Volcanic Ash ◽  
Settling Velocity ◽  
The United States ◽  
Alkaline Condition ◽  
Hydropower Station ◽  
Army Corps ◽  
Army Corps Of Engineers ◽  
Discharge Method

Ecuador is located in South America, and sediment of CCS hydropower station is mainly volcanic ash. This paper makes a study on settling efficiency of sedimentation with the quasi-hydrostatic settlement method and unsaturated sediment discharge method. The result shows that settling efficiency of the two methods are close to each other. Further more, the paper makes a study on settling velocity in different calculation methods, including the method of hydraulic engineering design manual, Zhang Ruijin calculation method and method of the United States Army Corps of Engineers. The settling velocity of volcanic ash under the weak alkaline condition and the influences of temperature on settling velocity are studied by testing. It can provide a reference for design of hydropower station in the surrouding area of South America

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