U.S. Army Engineer Research and Development Center

Two-Dimensional Simulations of Long-Term Morphological Evolution Around Tidal Inlets

Tidal inlets connect bays or lagoons to the ocean and undergo continuous morphological changes under the action of tides and waves. Numerical simulations of long-term morphological evolution near tidal inlets are computationally expensive because small time steps are needed for n...

PTBU v1.0: Polar Thermal Breakwater Unit

The Polar Thermal Breakwater Unit (PTBU) is a hybrid coastal-protection concept that combines mechanical coastal protection with a sealed internal freshwater or low-salinity water core intended to undergo seasonal freezing and melting. The external form follows the logic of inter...

PTBU v1.0: Polar Thermal Breakwater Unit

The Polar Thermal Breakwater Unit (PTBU) is a hybrid coastal-protection concept that combines mechanical coastal protection with a sealed internal freshwater or low-salinity water core intended to undergo seasonal freezing and melting. The external form follows the logic of inter...

Evaluating spectral unmixing techniques using imaging spectroscopy data for retrieval of green, non-photosynthetic vegetation, and soil fractional cover

Estimates of fractional cover of green vegetation (GV), non-photosynthetic vegetation (NPV), and soil provide valuable information about the Earth system. As the new generation of Earth visible-to-shortwave infrared (VSWIR) imaging spectrometers take orbit, global fractional cove...

A data-driven channel infilling rate forecasting framework with quantified uncertainty for Southwest Pass and Houston Ship Channel

Dredging operations in navigational waterways are essential to maintain channel depth to ensure the safe passage of vessels. Existing shoaling forecasting tools often rely on heuristics or direct modeling of cumulative sedimentation, limiting lead time and predictive reliability....

Laboratory Experiment of a Live Dune Sample to Validate Vegetated Dune Response

Abstract Coastal dunes are naturally occurring barriers that serve as defense measures from wave action and storm inundation. To combat coastal erosion, sediment placement efforts consisting of man-made dune construction are commonplace to protect coastal communities and shorelin...

Assessing levee stability: an investigation into early indicators of internal erosion from culvert defects

Levee stability can be compromised by internal erosion associated with culvert defects, yet early-stage erosion may not produce visible surface deformation. This study investigates the hydro-mechanical response of levees subjected to defect-driven internal erosion using four 20g...

Multispecies Mesocosms Evaluating Ongoing PCB Recontamination of Novel In Situ Sediment Remedies

Novel thin-layer sand coverings for in situ sediment remediation may be vulnerable to recontamination, elevating bioavailable polychlorinated biphenyls (PCBs) within and just above the thin layer. A series of 3-month marine mesoscale experiments containing sheepshead minnows (Cyp...

A Modular Desert Archipelago Architecture for Integrated Solar-Driven Water Production, Thermal Management, Agriculture, and Resource Recovery: A Concept Paper

This concept paper proposes a modular, distributed desert architecture for integrated freshwater production, thermal management, agriculture, and resource recovery. The system is organized as an artificial functional archipelago of physically separated units rather than a single...

A Modular Desert Archipelago Architecture for Integrated Solar-Driven Water Production, Thermal Management, Agriculture, and Resource Recovery: A Concept Paper

This concept paper proposes a modular, distributed desert architecture for integrated freshwater production, thermal management, agriculture, and resource recovery. The system is organized as an artificial functional archipelago of physically separated units rather than a single...

Measuring Ocean Surface Waves

Abstract Propagating waves on the ocean surface can be represented as a stochastic process whose statistics are characterized by a spectrum. This paper reviews methods for measuring the wave spectrum and related quantities. Observations begin by sensing fluid dynamical properties...

Artificial Desert Archipelago Theory (ADAT)

Artificial Desert Archipelago Theory (ADAT) proposes a conceptual environmental and geoengineering framework for addressing water scarcity, desertification, and increasing thermal stress in arid and hyper-arid regions. The central concept is to investigate whether strategically d...

Collaborative Optimization of Mechanical and Alkali-Reduction Performance of Ecological Low-Alkali Porous Concrete Based on Alkalinity Gradient Regulation

Abstract Porous concrete (PC) is widely used in slope ecological restoration due to its good permeability and plantability. However, the synergistic evolution mechanism between its mechanical properties and pore alkalinity has not been systematically elucidated, which has become...