• Portion of Rend Lake Bike Trail Closing for Archery Event

    Rend Lake College is hosting the USA Archery Collegiate 3D Regionals at North Marcum Archery Complex September 20-22, 2024. An estimated 130 shooters from 8 colleges and 3 states will be participating in the three-day event at Rend Lake.
  • Automated Built-Up Infrastructure Land Cover Extraction Using Index Ensembles with Machine Learning, Automated Training Data, and Red Band Texture Layers

    Abstract: Automated built-up infrastructure classification is a global need for planning. However, in-dividual indices have weaknesses, including spectral confusion with bare ground, and computational requirements for deep learning are intensive. We present a computationally lightweight method to classify built-up infrastructure. We use an ensemble of spectral indices and a novel red-band texture layer with global thresholds determined from 12 diverse sites (two seasonally varied images per site). Multiple spectral indexes were evaluated using Sentinel-2 imagery. Our texture metric uses the red band to separate built-up infrastructure from spectrally similar bare ground. Our evaluation produced global thresholds by evaluating ground truth points against a range of site-specific optimal index thresholds across the 24 images. These were used to classify an ensemble, and then spectral indexes, texture, and stratified random sampling guided training data selection. The training data fit a random forest classifier to create final binary maps. Validation found an average overall accuracy of 79.95% (±4%) and an F1 score of 0.5304 (±0.07). The inclusion of the texture metric improved overall accuracy by 14–21%. A comparison to site-specific thresholds and a deep learning-derived layer is provided. This automated built-up infrastructure mapping framework requires only public imagery to support time-sensitive land management workflows.
  • Dare County dredging permits suspended for repeated noncompliance

    The U.S. Army Corps of Engineers (USACE) Wilmington District suspended Dare County’s permits authorizing work in federal and non-federal channels in Oregon and Hatteras Inlet complexes due to a third recorded instance of noncompliance.
  • ‘We have the responsibility’: Missouri River fish and wildlife mitigation project a vital undertaking

    After Lewis and Clark ended their journey westward in 1806, an expedition known as the Corps of Discovery, the Missouri River would prove to be a vital link between the east and west. Flowing right through the heartland, the Missouri River is the longest river in the U.S. and is an important economic resource to the region, the nation and the world. Before the Missouri River became the navigation hub it is today, it was an untamed, wild body of water prone to flooding, known for changing paths, with a floodplain as wide as a mile in some places. By the late 19th century, the government realized the value the river could have on westward expansion and began the process of taming the river.
  • The Military and Planning for Lithium-Ion Battery Recycling

    Purpose: Understanding the military challenges related to lithium-ion battery disposal and learning about current and future trends in recycling efforts can inform safer and less environmentally destructive end-of-life solutions. Established lead-acid battery recycling methods were compared to the still-evolving lithium-ion battery recycling processes. Executive Order (EO) 13817, EO 13953, and EO 14017 have prioritized the identification of critical minerals, including minerals necessary for lithium-ion battery production, and the need to strengthen supply chains as vital to national security. To support this national security effort, the military may be able to contribute to the domestic supply through employing efficient recycling practices and encouraging industry to move towards standardization. Evolving recycling practices, including efforts to eliminate hazards in spent lithium-ion batteries, may be able to help the military dispose of these items more safely and cost-effectively, especially in contingency locations.
  • Automated Mapping of Land Cover Type within International Heterogenous Landscapes Using Sentinel-2 Imagery with Ancillary Geospatial Data

    Abstract: A near-global framework for automated training data generation and land cover classification using shallow machine learning with low-density time series imagery does not exist. This study presents a methodology to map nine-class, six-class, and five-class land cover using two dates of a Sentinel-2 granule across seven international sites. The approach uses a series of spectral, textural, and distance decision functions combined with modified ancillary layers to create binary masks from which to generate a balanced set of training data applied to a random forest classifier. For the land cover masks, stepwise threshold adjustments were applied to reflectance, spectral index values, and Euclidean distance layers, with 62 combinations evaluated. Global and regional adaptive thresholds were computed. An annual 95th and 5th percentile NDVI composite was used to provide temporal corrections to the decision functions, and these corrections were compared against the original model. The accuracy assessment found that the regional adaptive thresholds for both the two-date land cover and the temporally corrected land cover could accurately map land cover type within nine-class, six-class, and five-class schemes. Lastly, the five-class and six-class models were compared with a manually labeled deep learning model (Esri), where they performed with similar accuracies. The results highlight performance in line with an intensive deep learning approach, and reasonably accurate models created without a full annual time series of imagery.
  • Opportunities for Upper Mississippi River System Sand to Support Coastal Beach Nourishment

    Abstract: This research presents an opportunity to review the concept, status, and cost of using Upper Mississippi River (UMR) riverine dredged sand to nourish coastal beaches for increased resilience. Several dredged placement sites, transport modes, commercial and industrial uses, and end-point destinations will be identified in regional assessments and several specific UMR sediment to Great Lakes beneficial use projects will be reviewed here and assessed in greater detail during this research investigation.
  • Norfolk District Schedules Aerial Mosquito Treatment at Craney Island on September 20

    NORFOLK, Va. — The Norfolk District, U.S. Army Corps of Engineers, has scheduled aerial mosquito treatment on Sep 20th, over the federal property on Craney Island.
  • Washington Aqueduct wins regional awards for best tasting drinking water, advances to national competition

    The Washington Aqueduct earned multiple taste test awards for drinking water produced at its
  • Using iThenticate for ERDC Publications: Avoiding and Addressing Unintentional Plagiarism

    Abstract: The US Army Engineer Research and Development Center (ERDC) conducts world-class research that supports national endeavors and the Army mission. To demonstrate the reliability of ERDC’s research and to preserve ERDC’s reputation, it is critical that ERDC publications meet quality standards. This includes reviewing publications for potential copyright infringement, which adds another level of assurance to the quality and integrity of ERDC’s published works. Therefore, this report aims to explain the benefits and purpose behind implementing iThenticate, a powerful antiplagiarism tool, into the ERDC In-formation Technology Laboratory–Information Science and Knowledge Management (ISKM) Branch’s publication process and to present thorough guidance on using iThenticate effectively. To accomplish this, this document outlines the basics of copyright law, how to use iThenticate, and how to provide proper attributions for both text and images. With this information, ISKM editors will be able to better communicate to authors the results of iThenticate reviews and to propose solutions for any issues that iThenticate may highlight.