The development of long-term mean annual total nitrogen and total phosphorus load models for Mississippi, U.S., using RSPARROW
Victor L. Roland II, Emily Gain, Matthew B. Hicks
2026, Water (18)
Water-quality degradation from nutrient pollution remains a major challenge for resource managers. Developing effective strategies requires tools to characterize nutrient sources and transport. This study used the RSPARROW framework to develop and assess new, smaller-scale models for Total Nitrogen (TN) and Total Phosphorus (TP) transport across Mississippi (MS). These state-level...
Mountain goat declines in a protected, interior, native population
Tabitha A. Graves, William Michael Janousek, Michael Yarnall, Jami Belt
2026, Ecosphere (17)
A shifting climate poses threats to alpine-adapted species including mountain goats. We used long-term (12 years) citizen science monitoring data and Bayesian N-mixture modeling to estimate population trends and drivers of population metrics among mountain goats in Glacier National Park (GNP). Median goats per site (n = 37 sites) declined by 45% (95%...
Miocene evolution of the Humboldt Current
John A. Barron, Thomas J. DeVries, Jason J. Coenen
2026, Palaeogeography, Palaeoclimatology, Palaeoecology (686)
Diatom records from the East Pisco Basin (EPB) of southern Peru and offshore Ocean Drilling Program (ODP) Hole 682 A reveal stepwise increases in the primary productivity of the Humboldt Current during the middle and late Miocene. Although diatoms are present back through the late middle Eocene, successively enhanced diatom production...
Compilation of a nationwide river image dataset for identifying river channels and river rapids via deep learning
Nicholas Brimhall, Kelvyn K. Bladen, Tom Kerby, Carl J. Legleiter, Cameron Swapp, Hannah Fluckiger, Julie E Bahr, Makenna Roberts, Kaden Hart, Christina L. Stegman, Brennan Bean, Kevin Moon
2026, Remote Sensing (18)
Remote sensing enables large-scale, image-based assessments of river dynamics, offering new opportunities for hydrological monitoring. We present a publicly available dataset consisting of 281,024 satellite and aerial images of U.S. rivers, constructed using an Application Programming Interface (API) and the U.S. Geological Survey’s National Hydrography Dataset. The dataset includes images,...
Distribution, abundance, breeding activities, and habitat use of the Least Bell's Vireo at Marine Corps Base Camp Pendleton, California—2020–24 summary report
Suellen Lynn, Alexandra Houston, Barbara E. Kus, Shannon M. Mendia
2026, Open-File Report 2025-1057
Executive Summary The purpose of this report is to provide the Marine Corps with a summary of abundance, breeding activity, demography, and habitat use of endangered Least Bell’s Vireos (Vireo bellii pusillus) at Marine Corps Base Camp Pendleton, California (MCBCP or Base). The report presents results of vireo surveys and monitoring...
Comparison of two precipitation gage networks in Cook County, Illinois
Kevin K. Johnson
2026, Scientific Investigations Report 2025-5102
The Cook County Precipitation Network is a set of 25 precipitation gages established within Cook County, Illinois, on approximately a 5- to 7-mile square grid and used by the U.S. Army Corps of Engineers to help account for diversions of water from Lake Michigan to the State of Illinois. The...
Harmonization of aggregated freshwater biotic data to support continental and global assessment
Jennifer Lento, Sarah M. Laske, Joseph M. Culp, Willem Goedkoop, Maria Kahlert, Danny C.P. Lau, Isabelle Lavoie, Jordan Musetta-Lambert, Jón S. Ólafsson, Kirsten S. Christoffersen
2026, PLOS Water (5)
Biodiversity loss and conservation are increasingly coming into focus in global policy fora, requiring information and assessments at wider spatial and temporal scales than previously considered. However, the monitoring framework required to support such data collection and assessment is lacking in many countries and is not harmonized...
Recent range expansion and documentation of a reproductive population of northern snakehead Channa argus (Cantor, 1842) in the Saint Francis River Drainage, Missouri
Edward M. Sterling, Taylor A. Bookout, Erin Holmes, Neil Baalman, Cody Henderson, Patrick Kroboth
2026, Records of Biological Invasions (15) 183-194
Northern snakehead Channa argus (Cantor, 1842) is an aquatic invasive fish species in the United States with first documented occurrence in the wild in the 2000s. Management efforts to control their populations in the eastern United States are ongoing. In the Mississippi River basin, limited resources have been allocated to...
Compounding of 100-year coastal floods by rainfall in an urban environment
Shima Kasaei, Phillip M. Orton, Thomas Wahl, David K. Ralston, John C. Warner
2026, Environmental Research Letters (21)
Coastal and pluvial flooding are both becoming more prevalent and severe due to climate change and urbanization in floodplains. The co-occurrence of these flood drivers is generally assumed to exacerbate the resulting flood impacts, a result referred to as compound flooding. However, few observational or modeling studies have investigated the...
Conducting feasibility assessments of potential conservation reintroductions: A case study with the imperiled foothill yellow-legged frog, Rana boylii
Daniel Macias, Patrick M. Kleeman, Michelle L. Hladik, Kelly L. Smalling, Paul G. Johnson, Daniel A. Grear, Jonathan P. Rose, Brian J. Halstead
2026, Natural Areas Journal (46) 31-43
Conservation translocations are an increasingly common and often necessary component of recovering species that have become extirpated from portions of their range. Understanding and ameliorating potential threats that reduce the likelihood of successful population establishment at recipient sites is a key component of successful translocation planning. We examined multiple potential...
Hydrologic dynamics of ephemerally flooded playas in a dryland environment
Charles R. Kimsal, Enrique R. Vivoni, Osvaldo E. Sala, H. Curtis Monger, Owen P. McKenna
2026, Water Resources Research (62)
Ephemerally flooded playas are common in the southwestern United States and globally in drylands. Often formed in closed basins, playas are depressions which inundate infrequently from local precipitation and streamflow produced near the playa or from upland areas. Few studies have quantified the hydrologic connectivity between upland catchments and playas...
Monitoring recreation on federally managed lands and waters—Aspects of visitor use
Emily J. Wilkins, Dieta Hanson, Whitney Boone, Spencer A. Wood, Christian S.L. Crowley, Rudy Schuster
2026, Preprint
Federally managed public lands and waters receive about 1 billion recreational visits each year. Data on these visitors can aid in guiding policy decisions, managing resources effectively, and communicating the economic contributions of lands and waters. This report explores the methods used by agencies to collect data on aspects of...
An integrated mudstone facies classification scheme and revised interpretation of the sedimentologic processes driving carbon burial in the Cenomanian–Turonian Greenhorn Formation, Colorado, U.S.A.
Jason A. Flaum, Katherine L. French, Justin E. Birdwell, Kira K. Timm
2026, Journal of Sedimentary Research (96) 1-23
Standardizing facies descriptions has proven key to integrating interpretations of depositional processes and environments from sedimentologic observations with geochemistry data for mudstone lithologies. Because of their fine-grained nature, high degree of compaction, and heterogeneous composition, standardizing methods for mudstone descriptions has proven difficult, but it is critical...
Groundwater tracing used to delineate recharge areas and map karst groundwater pathways for subterranean streams at Oregon Caves National Monument and Preserve
Benjamin V. Miller
2026, Scientific Investigations Report 2025-5084
Oregon Caves National Monument and Preserve in southwestern Oregon is a 4,554-acre area managed by the National Park Service that is home to several cave systems, including Oregon Caves, which is the longest cave in Oregon, with 3.03 miles of mapped passages. Because of the interconnected nature of karst hydrologic...
A review and synthesis of post-wildfire shifts in hydrologic processes and streamflow generation mechanisms
Brian A. Ebel, John C. Hammond, Michelle A. Walvoord, Trevor Fuess Partridge, David M. Rey, Sheila F. Murphy
2026, Environmental Research: Water (1)
Critical water supply watersheds in the western United States (WUS) are impacted by wildfires, with potential negative effects on water quality and quantity. Scientific understanding is currently insufficient to deliver estimates of wildfire consequences for water quantity that are regionally accurate. Regional variability in the directionality and...
Computation of regional groundwater budgets for the Virginia Coastal Plain aquifer system
Jason P. Pope, Alison D. Gordon, Ryan S. Frederiks
2026, Preprint
Computation of detailed groundwater flow budgets for subdivisions of Virginia’s Coastal Plain aquifer system has enabled quantification and more thorough understanding of groundwater flow within this important water resource. A zone budget analysis conducted on previously published groundwater models of the Virginia Coastal Plain and Virginia Eastern Shore shows that...
More water, more of the time: Spatial changes in flooding over 83 years in the upper Mississippi River floodplain and relationships with streamgage-derived proxies
Molly Van Appledorn, Nathan R. De Jager, Jason J. Rohweder, Marcella Windmuller-Campione, Daniel Griffin
2026, Water Resources Research (62)
The hydrologic regime of the upper Mississippi River (UMR) has become wetter, with greater discharges, longer-lasting high-flow conditions, and seasonal shifts in these patterns over the past several decades. How these changes are expressed spatially as floodplain inundation area, frequency, depth, duration, and timing is not well understood. It is...
Biophysical controls on sediment erodibility in shallow estuarine embayments
Jessica R. Lacy, Samantha C. McGill, Janet Thompson, Rachel Allen, Francis Parchaso, David Hart, Lukas T. WinklerPrins, Joseph K. Fackrell, Andrew W. Stevens
2026, JGR Biogeosciences (131)
The erodibility of cohesive sediment is known to vary both spatially and temporally but the factors governing its variation are not well understood. We conducted a field investigation of the influence of hydrodynamic forcing, sediment properties, and benthic infauna on erodibility in the muddy shallows of San Pablo and Grizzly...
The contribution of a surge event to infilling in a barrier-enclosed estuary: Insights from field observations
Sanne M. Vaassen, Karin R. Bryan, Andrew Swales, Joel Carr, Conrad A. Pilditch
2026, Earth Surface Processes and Landforms (51)
Many estuaries worldwide face increasing sediment loading caused by catchment land use change and intensification, creating subsequent adverse effects on estuarine ecosystems. Extreme weather events can disproportionately alter sediment pathways and loading. Although storm-driven sediment exchange has been widely examined at open coasts and inlets, key transport mechanisms within constricted,...
The magmatic-hydrothermal system of the Three Sisters volcanic cluster, Oregon, imaged from field gravity measurements
Helene Le Mevel, Nathan Lee Andersen, Annika E. Dechert, Josef Dufek
2026, JGR Solid Earth (131)
From 2019 to 2024, gravity surveys were conducted at the Three Sisters volcanic cluster (TSVC), measuring 246 gravity sites using a spring relative gravimeter. We calculated the residual Bouguer anomaly and identified three main zones with negative anomalies, ranging from −4 to −8 mGal, located southwest and west of South...
Bird predation obscures detection of acoustic telemetry tags in fish
Richard Kraus, James J. Roberts, Mark Richard Dufour, Branden E. Kohler
2026, Animal Biotelemetry (14)
Increasing application of acoustic telemetry for determining survival, migration and habitat use of fishes highlights the need to improve interpretation of tracks that end abruptly: when is fishing mortality, predation, or some other cause to be inferred? Significant technological advances have led to the development of tags that “sense” predation...
Identifying headwater streams across the conterminous United States
Charles R. Lane, Ellen D’Amico, Jay R. Christensen, Heather E. Golden, Frederick Y. Cheng, John C. Hammond, Admin Husic, Kristin L. Jaeger, C. Nathan Jones, Christa A. Kelleher, Li Li, D. Tyler Mahoney, Hilary K. McMillan, Adam N. Price, Roy Sando, Catalina Segura, Erin C. Seybold, Adam S. Ward, Margaret Zimmer
2026, Ecosystems (29)
Headwater streams play critical roles in hydrologic and biogeochemical processes and functions, yet their spatial distribution and land cover context remain poorly understood at continental scales, and no dedicated geospatial dataset exists. Building from a high-resolution conterminous United States (CONUS) hydrography network dataset, we quantified the spatial...
Characterizing the influence of remotely sensed wetland and lake water storage on discharge using LSTM models
Melanie K. Vanderhoof, William Keenan, Wayana Dolan, Heather E. Golden, Charles R. Lane, Jay R. Christensen, Kylen Solvik, Adnan Rajib
2026, Hydrological Sciences Journal (71) 410-436
Globally, many wetlands and lakes are at risk for further loss, which can amplify downstream consequences of flood and drought events. We derived remotely sensed based time series of surface water storage (SWstorage) to determine when and where accounting for SWstorage dynamics improves predictions of river discharge. We...
Evaluation of water quality in the Langford Valley–Irwin Groundwater Subbasin, Fort Irwin National Training Center, California, 1993–2019
Jill N. Densmore, John A. Izbicki, Meghan C. Dick, Sandra Bond
2026, Scientific Investigations Report 2025-5105
The U.S. Army Fort Irwin National Training Center (NTC), 120 miles northeast of Los Angeles in the Mojave Desert of California, obtains its potable water supply from the Bicycle Valley and Langford Valley groundwater basins; Langford Valley groundwater basin is further subdivided into the Langford Well Lake and Irwin groundwater...
Assessment of water and proppant quantities associated with hydrocarbon production from the Haynesville Formation within the onshore United States and State waters of the Gulf Coast Basin, 2024
Rand Gardner, Jason A. Flaum, Seth S. Haines, Justin E. Birdwell, Scott A. Kinney, Brian A. Varela, Katherine L. French, Janet K. Pitman, Stanley T. Paxton, Tracey J. Mercier, Christopher J. Schenk, Heidi M. Leathers-Miller, Hannah D. Shook
2026, Fact Sheet 2025-3053
Building on a geology-based assessment of undiscovered, technically recoverable hydrocarbon resources within the Haynesville Formation, the U.S. Geological Survey estimated the water and proppant necessary for development of the remaining resources associated with the Haynesville Sabine Uplift Continuous Gas Assessment Unit. Additionally, projections have been made on the volume...
