Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9967
Growth rates for immature Kemp’s ridley sea turtles from a foraging area in the northern Gulf of Mexico
Examining vital rates helps clarify how environmental characteristics, biological resources and human activities affect population growth. Carapace lengths were gathered for 241 Kemp’s ridley Lepidochelys kempii sea turtles that were marked and recaptured (n = 23) between 2011 and 2019 at a foraging location in northwest Florida, USA. There was a strong correlation between length, width and weight
Authors
Margaret Lamont, Darren Johnson
Improved prediction of management-relevant groundwater discharge characteristics throughout river networks
Groundwater discharge zones connect aquifers to surface water, generating baseflow and serving as ecosystem control points across aquatic ecosystems. The influence of groundwater discharge on surface flow connectivity, fate and transport of contaminants and nutrients, and thermal habitat depends strongly on hydrologic characteristics such as the spatial distribution, age, and depth of source groun
Authors
Janet R. Barclay, J. Jeffrey Starn, Martin A. Briggs, Ashley Helton
Pesticide mixtures show potential toxicity to aquatic life in U.S. streams, water years 2013-2017
During water years (WY) 2013–2017, the U.S. Geological Survey, National Water-Quality Assessment (NAWQA) Project, sampled the National Water Quality Network – Rivers and Streams (NWQN) year-round and reported on 221 pesticides at 72 sites across the United States in agricultural, developed, and mixed land use watersheds. The Pesticide Toxicity Index (PTI) was used to estimate the potential chronic
Authors
S. Alex Covert, Megan E. Shoda, Sarah M. Stackpoole, Wesley W. Stone
Simulating wave runup on an intermediate–reflective beach using a wave-resolving and a wave-averaged version of XBeach
The prediction of wave runup, as well as its components, time-averaged setup and the time-varying swash, is a key element of coastal storm hazard assessments, as wave runup controls the transitions between morphodynamic response types such as dune erosion and overwash, and the potential for flooding by wave overtopping. While theoretically able to simulate the dominant low-frequency swash, previou
Authors
A.F. de beer, R.T. McCall, Joseph W. Long, M.F.S. Tissier, A.J.H.M. Reniers
The Everglades Depth Estimation Network (EDEN) surface-water interpolation model, version 3
The Everglades Depth Estimation Network (EDEN) is an integrated network of water-level gages, interpolation models that estimate daily water-level data at ungaged locations, and applications that generate derived hydrologic data across the freshwater part of the Greater Everglades landscape. Version 3 (V3) of the EDEN interpolation surface-water model is the most recent update, replacing the versi
Authors
Saira Haider, Eric Swain, James Beerens, Matthew D. Petkewich, Bryan McCloskey, Heather Henkel
Modeling soil porewater salinity in mangrove forests (Everglades, Florida, USA) impacted by hydrological restoration and a warming climate
Hydrology is a critical driver controlling mangrove wetlands structural and functional attributes at different spatial and temporal scales. Yet, human activities have negatively affected hydrology, causing mangrove diebacks and coverage loss worldwide. In fact, the assessment of mangrove water budgets, impacted by natural and human disturbances, is limited due to a lack of long-term data and infor
Authors
Xiaochen Zhao, Victor H. Rivera-Monroy, Hongqing Wang, Zuo Xue, Cheng-Feng Tsai, C. S. Willson, E. Castañeda-Moya, Robert R. Twilley
Total water level data from the January and March 2018 nor’easters for coastal areas of New England
During winter 2017–18 coastal areas of New England were impacted by the January 4, and March 2–4, 2018, nor’easters. The U.S. Geological Survey (USGS), under an interagency agreement with the Federal Emergency Management Agency (FEMA), collected total water level data (the combination of tide, storm surge, wave runup and setup, and freshwater input) using the North American Vertical Datum of 1988
Authors
Gardner C. Bent, Nicholas J. Taylor
Observed and modeled mercury and dissolved organic carbon concentrations and loads at control structure S-12D, Florida Everglades, 2013–17
Mercury (Hg) has been a contaminant of concern for several decades in South Florida, particularly in the Florida Everglades. The transport and bioavailability of Hg in aquatic systems is intimately linked to dissolved organic carbon (DOC). In aquatic systems, Hg can be converted to methylmercury (MeHg), which is the form of Hg that bioaccumulates in food webs. The bioaccumulation of MeHg poses sig
Authors
Amanda Booth, Brett A. Poulin, David P. Krabbenhoft
Phytoremediation of slightly brackish, polycyclic aromatic hydrocarbon‐contaminated groundwater from 250 ft below land surface: A pilot‐scale study using salt‐tolerant, endophyte‐enhanced hybrid poplar trees at a Superfund site in the Central Valley of Ca
Slightly brackish groundwater contaminated by polycyclic aromatic hydrocarbons (PAHs) at a Superfund site in the Central Valley of California was pumped from 250 feet below land surface to a water storage tank using solar power and then gravity‐fed into 18, 330‐gallon intermediate bulk containers (totes) as follows:(1)Five totes contained planting medium with three salt‐tolerant hybrid poplar tree
Authors
James E. Landmeyer, Steven Rock, John Freeman, Greg Nagle, Mark Samolis, Herb Levine, Anna-Marie Cook, Harry O'Neill
Occurrence and spatiotemporal dynamics of pharmaceuticals in a temperate-region wastewater effluent-dominated stream: Variable inputs and differential attenuation yield evolving complex exposure mixtures
Effluent-dominated streams are becoming increasingly common in temperate regions and generate complex pharmaceutical mixture exposure conditions that may impact aquatic organisms via drug–drug interactions. Here, we quantified spatiotemporal pharmaceutical exposure concentrations and composition mixture dynamics during baseflow conditions at four sites in a temperate-region effluent-dominated stre
Authors
Hui Zhi, Dana W. Kolpin, R. D. Klaper, Luke R. Iwanowicz, Shannon M. Meppelink, Gregory H. LeFevre
Compounds of emerging concern detected in water samples from potable water and wastewater treatment plants and detected in water and bed-sediment samples from sites on the Trinity River, Dallas, Texas, 2009–13
The population in the Dallas-Fort Worth metropolitan area in northern Texas is rapidly growing, resulting in a rapid increase in the demand for potable water and an increase in the discharge of wastewater treatment plant effluent. An assessment of compounds of emerging concern (CECs) in samples collected at potable water and wastewater treatment plants in Dallas and downstream from Dallas in the T
Authors
Christopher J. Churchill, Stanley Baldys III, Cathina L. Gunn, Craig A. Mobley, Daniel P. Quigley
Methods for estimating selected low-flow frequency statistics and mean annual flow for ungaged locations on streams in Alabama
Streamflow data and statistics are vitally important for proper protection and management of the water quality and water quantity of Alabama streams. Such data and statistics are generally available at U.S. Geological Survey streamflow-gaging stations, also referred to as streamgages or stations, but are often needed at ungaged stream locations. To address this need, the U.S. Geological Survey, in
Authors
Toby D. Feaster, Katharine Kolb, Jaime A. Painter, Jimmy M. Clark