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Tag: hydrology
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  • January

    The "New" National Inventory of Dams (NID)'s Redesigned Website Now With Flood Inundation Maps to Download and ‘Share’

    The NID is the central repository for information about dams in the U.S. and its territories that
  • December

    Congratulating Achievements - IWR ANNUAL AWARDS Recap

    Employee recognition at the Institute for Water Resources (IWR) is all about acknowledging the hard
  • May

    Remembering a Memphis District hero, brother

    The Memphis District and Chasteen family recently lost a beloved member to a hard-fought battle with cancer. Darian Chasteen, who most recently held the Hydraulics and Hydrology Branch Deputy Chief title, passed away on May 7, 2021. While no longer physically with us, his legacy will forever live on. Chasteen served more than 30 years with the U.S. Army Corps of Engineers, Memphis District. During that time, he made many friends and touched numerous lives. In honor of his life and the contributions he made, we take a look back at his life, happy and thankful to have known such a person.
  • Hydrology? District team provides professional water resources expertise, support

    Flowing through the U.S. Army Corps of Engineers, Omaha District’s area of responsibility, the Missouri River is the longest in the U.S. and its basin (watershed) covers more than 500 thousand square miles. The District’s hydrology section team plays a vital role in supporting this important civil works mission and helping to manage this precious natural resource.
  • October

    ERDC researchers use numerical modeling to assist with hurricane preparations

    As a tropical system approaches the coastline and the intensity and impact of the storm becomes evident, officials and first responders brace for landfall by staging equipment and readying personnel for the aftermath. To assist in these efforts, researchers at the U.S. Army Engineer Research and Development Center (ERDC) are using numerical modeling systems to help U.S. Army Corps of Engineers (USACE) districts better prepare for storms.
  • February

    Builders of Bulwark: Norfolk H&H engineer illustrates the heart, path of a problem-solver

    There are creative kids who want to produce art; there are athletic kids who seek sports; and maybe, there are the engineering kids who want to problem-solve. And if that’s the case, people like Leah Weaver would be their inspiration.
  • June

    Retiree Bob Sneed receives Distinguished Civilian Employee Recognition Award

    RIDGETOP, Tenn. (June 8 2018) – The retired water manager best known for overseeing water releases during the May 2010 flood of the Cumberland River received the Distinguished Civilian Employee Recognition Award today during the Engineer Day Picnic at Smiley Hollow.
  • September

    Albuquerque District’s Brown selected for ERDC University

    District Hydrologic Engineer Stephen Brown is one of the initial participants in the ERDC University pilot program. His work focuses on modeling applications of the Las Conchas wildfire burn scar in northern New Mexico and has widespread future application opportunities.
  • Gathright Dam pulse release underway

    At 6 a.m. today, operators at Gathright Dam near Covington, Virginia began conducting a pulse release. The pulse will gradually increase and peak at 3,500 cubic feet per second by 9 a.m. The maximum surge will last two hours, begin to gradually decrease at 11 a.m., and return to 240 cfs by 1:30 p.m.
  • February

    Engineering: It's not just for the boys

    About 350 middle and high school-age girls and their parents explored career paths in STEM (science, technology, engineering and mathematics) during the 3rd Annual Girls Engineer It Day, Feb. 1, 2014 at Woodville Tomkins High School.

News Releases

Results:
Tag: hydrology
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  • PUBLICATION NOTICE: Utilizing Stream Flows to Forecast Dredging Requirements

    Abstract: In recent years, the United States Army Corps of Engineers (USACE) has spent an average of approximately a billion dollars annually for navigation channel maintenance dredging. To execute these funds effectively, USACE districts must determine which navigation channels are most in need of maintenance dredging each year. Traditionally, dredging volume estimates for Operations and Maintenance budget development are based on experiential knowledge and historic averages, with the effects of upstream, precipitation-driven streamflows considered via general-rule approximations. This study uses the Streamflow Prediction Tool, a hydrologic routing model driven by global weather forecast ensembles, and dredging records from the USACE Galveston District to explore relationships between precipitation-driven inland channel flow and subsequent dredged volumes in the downstream coastal channel reaches. Spatially based regression relationships are established between cumulative inland flows and dredged volumes. Results in the test cases of the Houston Ship Channel and the Sabine-Neches Waterway in Texas indicate useful correlations between the computed streamflow volumes and recorded dredged volumes. These relationships are stronger for channel reaches farther inland, upstream of the coastal processes that are not included in the precipitation-driven hydrologic model.
  • Lakeville resident selected for prestigious award

    ST. PAUL, Minn. – The U.S. Army Corps of Engineers Headquarters in Washington, D.C., recently selected Lakeville, Minnesota, resident and St. Paul District senior hydraulic engineer Ann Banitt as the recipient of its Hydrology, Hydraulics and Coastal Community of Practice Professional of the Year Award.
  • PUBLICATION NOTICE: Spatial Analysis of Precipitation and Snow Water Equivalent Extremes for the Columbia River Basin

    Abstract: Recent advances in the spatial statistics of extremes and model calibration were applied to develop and deliver areal-exceedance estimates for precipitation (PREC), by season and duration, and snow water equivalent (SWE), by cool season month and for the water year, for 758 delineated sub-basins of the Columbia River Basin (CRB), which correspond to a new CRB hydrology model watershed delineation. Understanding that future US Army Corps of Engineers, Northwestern Division, mission requirements may change, project execution also included the development and delivery of an application guidance document to credibly compute areal-exceedance estimates, including uncertainty, for PREC or SWE for any arbitrary area within the CRB. R, a free software environment for statistical computing and graphics (https://www.r-project.org/), and QGIS, a free and open source geographic information system (https://qgis.org/en/site/index.html), were the primary tools used for product development and delivery. The following R software packages were primarily used during project execution: evd, Glmnet, maps, raster, rgdal, SDMTools, sp, and SpatialExtremes.
  • PUBLICATION NOTICE: Analysis of Snow Water Equivalent Annual Maxima in the Upper Connecticut River Basin Using a Max-Stable Spatial Process Model

    Abstract: Recent advances from the science of spatial extremes and model regularization were applied to develop areal-based extremes of snow water equivalent (SWE) data for the upper Connecticut River Basin. Development of areal-based SWE exceedance probability estimates are of relevance for cool season probabilistic flood hazard analyses (PFHA). The approach profiled in this case study is applicable for other hydrometeor-ological variables of relevance to PFHA. The methodology conforms with Extreme Value Theory (EVT) for the analysis of spatial extremes; hence, there is a firm theoretical basis for extrapolation. Trend surface development is guided by EVT theory and recent advances for regularizing general linear models. R, a free software environment for statistical computing and graphics, and QGIS, a free and open-source geographic information system, were the primary tools used for product development and delivery. The following R software packages were primarily used during project execution: evd, Glmnet, maps, raster, rgdal, SDMTools, sp, and SpatialExtremes. R software packages exist in the public domain and support PFHA analyses of varying complexities. Their application herein is not an endorsement or recommendation. It is recommended that one would need to evaluate any particular R software package regarding its suitability for use for any specific application.