Atmospheric inputs to watersheds of the Luquillo Mountains in eastern Puerto Rico: Chapter D in Water quality and landscape processes of four watersheds in eastern Puerto Rico
Robert F. Stallard
Sheila F. Murphy, Robert F. Stallard, editor(s)
2012, Professional Paper 1789-D
Twenty years of precipitation-chemistry data from the National Atmospheric Deposition Program site at El Verde, Puerto Rico, demonstrate that three major sources control the composition of solutes in rain in eastern Puerto Rico. In order of importance, these sources are marine salts, temperate contamination from the Northern Hemisphere, and Sahara...
Landslides and sediment budgets in four watersheds in eastern Puerto Rico: Chapter F in Water quality and landscape processes of four watersheds in eastern Puerto Rico
Matthew C. Larsen
Sheila F. Murphy, Robert F. Stallard, editor(s)
2012, Professional Paper 1789-F
The low-latitude regions of the Earth are undergoing profound, rapid landscape change as forests are converted to agriculture to support growing population. Understanding the effects of these land-use changes requires analysis of watershed-scale geomorphic processes to better inform and manage this usually disorganized process. The investigation of hillslope erosion and...
Effects of earthworms on slopewash, surface runoff, and fine-litter transport on a humid-tropical forested hillslope in eastern Puerto Rico: Chapter G in Water quality and landscape processes of four watersheds in eastern Puerto Rico
Matthew C. Larsen, Zhigang Liu Liu, Xiaoming Zou
Sheila F. Murphy, Robert F. Stallard, editor(s)
2012, Professional Paper 1789-G
Rainfall, slopewash (the erosion of soil particles), surface runoff, and fine-litter transport were measured in tropical wet forest on a hillslope in the Luquillo Experimental Forest, Puerto Rico, from February 1998 until April 2000. Slopewash data were collected using Gerlach troughs at eight plots, each 2 square meters in area....
Externally triggered renewed bubble nucleation in basaltic magma: the 12 October 2008 eruption at Halema‘uma‘u Overlook vent, Kīlauea, Hawai‘i, USA
Rebecca J. Carey, Michael Manga, Wim Degruyter, Donald Swanson, Bruce F. Houghton, Tim R. Orr, Matthew R. Patrick
2012, Journal of Geophysical Research B: Solid Earth (117)
From October 2008 until present, dozens of small impulsive explosive eruptions occurred from the Overlook vent on the southeast side of Halema‘uma‘u Crater, at Kīlauea volcano, USA. These eruptions were triggered by rockfalls from the walls of the volcanic vent and conduit onto the top of the lava column. Here...
Developing accurate survey methods for estimating population sizes and trends of the critically endangered Nihoa Millerbird and Nihoa Finch.
P. Marcos Gorresen, Richard J. Camp, Kevin W. Brinck, Chris Farmer
2012, Technical Report HCSU-034
This report describes the results of a comparative study of bird survey methods undertaken for the purpose of improving assessments of the conservation status for the two endemic passerines on the Island of Nihoa—Nihoa Millerbird (Sylviidae: Acrocephalus familiaris kingi) and Nihoa Finch (Fringilidae: Telespiza ultima; also referred herein as millerbird...
Predicting biological condition in southern California streams
Larry R. Brown, Jason T. May, Andrew C. Rehn, Peter R. Ode, Ian R. Waite, Jonathan G. Kennen
2012, Landscape and Urban Planning (108) 17-27
As understanding of the complex relations among environmental stressors and biological responses improves, a logical next step is predictive modeling of biological condition at unsampled sites. We developed a boosted regression tree (BRT) model of biological condition, as measured by a benthic macroinvertebrate index of biotic integrity (BIBI), for streams...
The hydrology of a drained topographical depression within an agricutlural field in north-central Iowa
Jason L. Roth, Paul D. Capel
2012, Transactions of the American Society of Agricultural and Biological Engineers (55) 1801-1814
North-central Iowa is an agriculturally intensive area comprising the southeastern portion of the Prairie Pothole Region, a landscape containing a high density of enclosed topographical depressions. Artificial drainage practices have been implemented throughout the area to facilitate agricultural production. Vertical surface drains are utilized to drain the topographical depressions that...
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2011
James P. Dixon, Scott D. Stihler, John A. Power, Cheryl K. Searcy
2012, Data Series 730
Between January 1 and December 31, 2011, the Alaska Volcano Observatory (AVO) located 4,364 earthquakes, of which 3,651 occurred within 20 kilometers of the 33 volcanoes with seismograph subnetworks. There was no significant seismic activity above background levels in 2011 at these instrumented volcanic centers. This catalog includes locations, magnitudes,...
Landslides in Colorado, USA--Impacts and loss estimation for 2010
Lynn M. Highland
2012, Open-File Report 2012-1204
The focus of this study is to investigate landslides and consequent losses which affected Colorado in the year 2010. By obtaining landslide reports from a variety of sources, this report will demonstrate the feasibility of creating a profile of landslides and their effects on communities. A short overview of the...
Investigation of land subsidence in the Houston-Galveston region of Texas by using the Global Positioning System and interferometric synthetic aperture radar, 1993-2000
Gerald W. Bawden, Michaela R. Johnson, Mark C. Kasmarek, Justin T. Brandt, Clifton S. Middleton
2012, Scientific Investigations Report 2012-5211
Since the early 1900s, groundwater has been the primary source of municipal, industrial, and agricultural water supplies for the Houston-Galveston region, Texas. The region's combination of hydrogeology and nearly century-long use of groundwater has resulted in one of the largest areas of subsidence in the United States; by 1979, as...
Compartment-based hydrodynamics and water quality modeling of a northern Everglades wetland, Florida, USA
Hongqing Wang, Ehab A. Meselhe, Michael G. Waldon, Matthew C. Harwell, Chunfang Chen
2012, Ecological Modelling (247) 273-285
The last remaining large remnant of softwater wetlands in the US Florida Everglades lies within the Arthur R. Marshall Loxahatchee National Wildlife Refuge. However, Refuge water quality today is impacted by pumped stormwater inflows to the eutrophic and mineral-enriched 100-km canal, which circumscribes the wetland. Optimal management is a challenge...
A basin-scale approach for assessing water resources in a semiarid environment: San Diego region, California and Mexico
L. E. Flint, A. L. Flint, Bernard J. Stolp, W.R. Danskin
2012, Hydrology and Earth System Sciences (16) 3817-3833
Many basins throughout the world have sparse hydrologic and geologic data, but have increasing demands for water and a commensurate need for integrated understanding of surface and groundwater resources. This paper demonstrates a methodology for using a distributed parameter water-balance model, gaged surface-water flow, and a reconnaissance-level groundwater flow model...
Wildlife contact analysis: Emerging methods, questions, and challenges
Paul C. Cross, Tyler G. Creech, Michael R. Ebinger, Dennis M. Heisey, Kathryn M. Irvine, Scott Creel
2012, Behavioral Ecology and Sociobiology (66) 1437-1447
Recent technological advances, such as proximity loggers, allow researchers to collect complete interaction histories, day and night, among sampled individuals over several months to years. Social network analyses are an obvious approach to analyzing interaction data because of their flexibility for fitting many different social structures as well as the...
Archive of digital chirp subbottom profile data collected during USGS cruise 10BIM04 offshore Cat Island, Mississippi, September 2010
Arnell S. Forde, Shawn V. Dadisman, Jack L. Kindinger, Jennifer L. Miselis, Dana S. Wiese, Noreen A. Buster
2012, Data Series 724
In September of 2010, the U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers (USACE), conducted a geophysical survey to investigate the geologic controls on barrier island framework of Cat Island, Miss., as part of a broader USGS study on Barrier Island Mapping (BIM). These surveys...
Archive of digital boomer subbottom profile data collected in the Atlantic Ocean offshore northeast Florida during USGS cruises 03FGS01 and 03FGS02 in September and October of 2003
Karynna Calderon, Arnell S. Forde, Shawn V. Dadisman, Dana S. Wiese, Daniel C. Phelps
2012, Data Series 670
In September and October of 2003, the U.S. Geological Survey (USGS), in cooperation with the Florida Geological Survey, conducted geophysical surveys of the Atlantic Ocean offshore northeast Florida from St. Augustine, Florida, to the Florida-Georgia border. This report serves as an archive of unprocessed digital boomer subbottom profile data, trackline...
Geologic assessment of undiscovered conventional oil and gas resources--Middle Eocene Claiborne Group, United States part of the Gulf of Mexico Basin
Paul C. Hackley
2012, Open-File Report 2012-1144
The Middle Eocene Claiborne Group was assessed using established U.S. Geological Survey (USGS) assessment methodology for undiscovered conventional hydrocarbon resources as part of the 2007 USGS assessment of Paleogene-Neogene strata of the United States part of the Gulf of Mexico Basin including onshore and State waters. The assessed area is...
History of earthquakes and tsunamis along the eastern Aleutian-Alaska megathrust, with implications for tsunami hazards in the California Continental Borderland
Holly F. Ryan, Roland E. von Huene, Ray E. Wells, David W. Scholl, Stephen Kirby, Amy E. Draut
Julie A. Dumoulin, C. Dusel-Bacon, editor(s)
2012, Professional Paper 1795-A
During the past several years, devastating tsunamis were generated along subduction zones in Indonesia, Chile, and most recently Japan. Both the Chile and Japan tsunamis traveled across the Pacific Ocean and caused localized damage at several coastal areas in California. The question remains as to whether coastal California, in particular...
Archive of digital boomer subbottom data collected during USGS cruise 05FGS01 offshore east-central Florida, July 17-29, 2005
Arnell S. Forde, Shawn V. Dadisman, Dana S. Wiese, Daniel C. Phelps
2012, Data Series 647
In July of 2005, the U.S. Geological Survey (USGS), in cooperation with the Florida Geological Survey (FGS), conducted a geophysical survey of the Atlantic Ocean offshore of Florida's east coast from Flagler Beach to Daytona Beach. This report serves as an archive of unprocessed digital boomer subbottom data, trackline maps,...
Surface-water radon-222 distribution along the west-central Florida shelf
Christopher G. Smith, L. L. Robbins
2012, Open-File Report 2012-1212
In February 2009 and August 2009, the spatial distribution of radon-222 in surface water was mapped along the west-central Florida shelf as collaboration between the Response of Florida Shelf Ecosystems to Climate Change project and a U.S. Geological Survey Mendenhall Research Fellowship project. This report summarizes the surface distribution of...
Mapping plant species ranges in the Hawaiian Islands: developing a methodology and associated GIS layers
Jonathan P. Price, James D. Jacobi, Samuel M. Gon III, Dwight Matsuwaki, Loyal Mehrhoff, Warren Wagner, Matthew Lucas, Barbara Rowe
2012, Open-File Report 2012-1192
This report documents a methodology for projecting the geographic ranges of plant species in the Hawaiian Islands. The methodology consists primarily of the creation of several geographic information system (GIS) data layers depicting attributes related to the geographic ranges of plant species. The most important spatial-data layer generated here is...
Sample design effects in landscape genetics
Sara J. Oyler-McCance, Bradley C. Fedy, Erin L. Landguth
2012, Conservation Genetics
An important research gap in landscape genetics is the impact of different field sampling designs on the ability to detect the effects of landscape pattern on gene flow. We evaluated how five different sampling regimes (random, linear, systematic, cluster, and single study site) affected the probability of correctly identifying the...
Generation of a U.S. national urban land use product
James A. Falcone, Collin G. Homer
2012, Photogrammetric Engineering and Remote Sensing (78) 1057-1068
Characterization of urban land uses is essential for many applications. However, differentiating among thematically-detailed urban land uses (residential, commercial, industrial, institutional, recreational, etc.) over broad areas is challenging, in part because image-based solutions are not ideal for establishing the contextual basis for identifying economic function and use. At present no...
Decision-support systems for natural-hazards and land-management issues
Laura Dinitz, William Forney, Kristin Byrd
2012, Fact Sheet 2012-3001
Scientists at the USGS Western Geographic Science Center are developing decision-support systems (DSSs) for natural-hazards and land-management issues. DSSs are interactive computer-based tools that use data and models to help identify and solve problems. These systems can provide crucial support to policymakers, planners, and communities for making better decisions about...
Geophysical studies in the vicinity of Blue Mountain and Pumpernickel Valley near Winnemucca, north-central Nevada
David A. Ponce
2012, Open-File Report 2012-1207
From May 2008 to September 2009, the U.S. Geological Survey (USGS) collected data from more than 660 gravity stations, 100 line-km of truck-towed magnetometer traverses, and 260 physical-property sites in the vicinity of Blue Mountain and Pumpernickel Valley, northern Nevada (fig. 1). Gravity, magnetic, and physical-property data were collected to...
Archive of single-beam bathymetry data collected during USGS cruise 07CCT01 nearshore of Fort Massachusetts and within Camille Cut, West and East Ship Islands, Gulf Islands National Seashore, Mississippi, July 2007
Nancy T. DeWitt, James G. Flocks, B.J. Reynolds, Mark Hansen
2012, Data Series 722
The Gulf Islands National Seashore (GUIS) is composed of a series of barrier islands along the Mississippi - Alabama coastline. Historically these islands have undergone long-term shoreline change. The devastation of Hurricane Katrina in 2005 prompted questions about the stability of the barrier islands and their potential response to future...
