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  • ERDC-CERL advances environmental DNA capabilities for military installations

    The U.S. Army Engineer Research and Development Center’s Construction Engineering Research Laboratory (ERDC-CERL) is strengthening the mission of expanding the Department of War’s ability to use environmental DNA (eDNA) as a natural resource management tool in maintaining Department of War training lands.

  • Taking Out the Middleman: On-Site E. Coli Testing at Carters Lake Saves Time, Money, and Lives

    When thousands of swimmers flock to the emerald waters of Carters Lake each summer, water safety is paramount. Until recently, verifying that the lake's designated swim beaches met stringent federal and state water quality standards meant collecting water samples, driving them down to a contract laboratory in Calhoun, and waiting nearly a week for results.

  • Union Grove Campground at Stillhouse Hollow Lake Reopens Following Construction Improvements

    The U.S. Army Corps of Engineers at Stillhouse Hollow Lake is excited to announce Union Grove Campground has reopened following the completion of major construction improvements, with campsites 1–12 now available for public use.

  • 25 Years After 9/11, Army Corps Looks Back on Historic Emergency Response

    It’s been a quarter century since the worst terror attack in U.S. history when hijackers crashed airliners into the Twin Towers of the World Trade Center in New York City and the Pentagon in Washington D.C. The Towers collapsed within hours, the world was changed forever, and the New York District of the Army Corps of Engineers ─ assisted by Corps personnel from other Districts ─ embarked on a massive disaster response like no other.

  • USACE Historians help bring ‘Steel and Stone’ exhibit to life

    Twenty-five years after America faced one of its darkest days on September 11, 2001, the National Museum of the United States Army’s new exhibit is highlighting the extraordinary stories of U.S. Army Corps of Engineers service, resilience, and engineering ingenuity.

  • Looking Back at Ground Zero, Part 3

    Third and final part of a series highlighting the firsthand experiences of Omaha District employees who supported search and recovery efforts at Ground Zero following the terrorist attacks on Sept. 11, 2001. The series is in recognition of the 25th anniversary of the September 11th attacks.

  • MKARNS Nav Notice SWL 26-32 Scheduled Lock Closure Update

    The partial closure of James A. Trimble Lock and Dam No. 13 (NM 292.8) has been extended through November 18, 2026.

  • Evaluating the Impact of Installation of Coastal Structure on Sediment Transport

    Abstract: A coastal wave, hydrodynamic and sediment transport model was developed and applied for a small port in an estuarine system. The study focused on evaluating the installation of coastal structures at the modular causeway mooring field of the port, aiming to reduce sedimentation, maximize the usable waterway, and mitigate the potential for impact on the wetland adjacent to the mooring area. The model performance on sediment transport and morphology change was demonstrated by the comparison of survey data and model calculations. The modeled current fields support a plausible sediment source concerning the material accretion and channel infilling in the mooring field. The installation of a solid structure, a riprap or a sheet pile, surrounding the mooring field can act as a sediment barrier in the study area, which can reduce current and erosion in the identified sediment source area behind the mooring field and result in less sediment supply to the mooring field and the channel area over built structures.

  • Decadal Data Set of Hourly Beach Profile Evolution in Duck, NC

    Abstract: This paper presents initial results of a decadal dataset of sub-aerial beach profile evolution collected at the U.S. Army Engineer Research and Development Center’s Field Research Facility in Duck, NC using a stationary terrestrial lidar scanner (TLS) mounted above the dune. The data are processed using an automated work flow in near realtime and are made public for the coastal science and engineering community to use at (https://chlthredds.erdc.dren.mil/). At submission, the data set consisted of 48,911 processed cross-shore profiles that passed the automated quality assurance quality control checks (81% of the 60,6046 collected scans). A basic description of the dataset is provided, including example storm impact and beach recovery sequences, and an initial investigation is presented that relates pre-storm beach morphology, storm wave power, and profile response and highlights the importance of initial beach state.

  • L‐Band InSAR Snow Water Equivalent Retrieval Uncertainty Increases with Forest Cover Fraction

    Abstract: There is a pressing need for global monitoring of snow water equivalent (SWE) at high spatiotemporal resolution, and L‐band (1–2 GHz) interferometric synthetic aperture radar (InSAR) holds promise. However, the technique has not seen extensive evaluation in forests. We evaluated this technique across varying forest canopy conditions using eight InSAR pairs collected at the Fraser Experimental Forest, Colorado, USA by NASA UAVSAR during the 10‐week NASA SnowEx 2021 Campaign. Compared with in situ measurements, we found root mean squared errors (RMSEs) of 14–17 mm for SWE changes in forest cover fractions (FCF) < 0.40, but RMSEs increased to 33–40 mm at FCF > 0.50. Statistical distributions between normalized lidar snow depths and normalized UAVSAR SWE were similar at FCF < 0.5, but diverged at FCF > 0.50. Thus, the upcoming NISAR L‐band satellite has strong potential for global snowpack monitoring, including below sparse to moderate forest cover.