Filters: Tags: Soil (X)
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Geochemists have long recognized a correlation between rates of physical denudation and chemical weathering. What underlies this correlation? The Critical Zone can be considered as a feed-through reactor. Downward advance of the weathering front brings unweathered rock into the reactor. Fluids are supplied through precipitation. The reactor is stirred at the top by biological and physical processes. The balance between advance of the weathering front by mechanical and chemical processes and mass loss by denudation fixes the thickness of the Critical Zone reactor. The internal structure of this reactor is controlled by physical processes that create surface area, determine flow paths, and set the residence time of...
Electric utilities in the US have initiated forestry projects to conserve energy and to oset carbon dioxide (CO2) emissions. In 1995, 40 companies raised US$2.5 million to establish the non-pro®t UtiliTree Carbon Company which is now sponsoring eight projects representing a mix of rural tree planting, forest preservation, forest management and research eorts at both domestic (Arkansas, Louisiana, Mississippi, and Oregon) and international sites (Belize and Malaysia). The projects include extensive external veri®cation. Such forestry projects Ð properly documented, monitored and veri®ed Ð should be a component of domestic and international strategies to address greenhouse gas (GHG) emissions, due to GHG bene®ts,...
Categories: Publication;
Types: Citation;
Tags: Carbon dioxide,
Electric,
Forest,
Greenhouse,
Manage,
Geochemical data for soils collected in the United States and analyzed by the USGS. The data were originally entered into the in-house PLUTO database.
Shifts in plant community structure in shrub and grass-dominated ecosystems are occurring over large land areas in the western US. It is not clear what effect this vegetative change will have on rates of carbon and nitrogen cycling, and thus long-term ecosystem productivity. To study the effect of different plant species on the decomposability of soil organic substrates and rates of C- and N-cycling, we conducted laboratory incubations of soils from a 15-yr-old experimental plot where big sagebrush (Artemisia tridentata Nutt.) and crested wheatgrass (Agropyron desertorum [Fisch.] Schult.) plants had been planted in a grid pattern. Soil samples collected from beneath crested wheatgrass had significantly greater total...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Carbon storage,
Decomposition,
Gross mineralization,
Microbial biomass,
Nitrification,
An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site was instrumented to collect data on soil-water content, soil-water potential, ground water levels, major ions, pesticides, and nutrients from the unsaturated zone during 2002-2004. The data set was enhanced with site-specific information describing weather, soils, and agricultural practices. The Root Zone Water Quality Model was used to simulate physical, chemical, and biological processes occurring in the unsaturated zone. Model calibration to bromide tracer concentrations indicated flow occurred through the soil matrix. Simulated recharge rates were within...
The cold deserts of the Colorado Plateau contain numerous geologically and geochemically distinct sedimentary bedrock types. In the area near Canyonlands National Park in Southeastern Utah, geochemical variation in geologic substrates is related to the depositional environment with higher concentrations of Fe, Al, P, K, and Mg in sediments deposited in alluvial or marine environments and lower concentrations in bedrock derived from eolian sand dunes. Availability of soil nutrients to vegetation is also controlled by the formation of secondary minerals, particularly for P and Ca availability, which, in some geologic settings, appears closely related to variation of CaCO3 and Ca-phosphates in soils. However, the results...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Ecosystems,
bedrock,
desert,
foliar,
nutrient,
Our objective is to improve the scientific understanding of the modes, rates, and mechanisms of carbon stabilization and losses in soils from Alaska, California, and other Western states. We focus on the biophysical and microbial mechanisms that drive carbon gains and losses, and to use our data to improve models of soil carbon cycling. This catalog supports research from several projects focused on soil carbon cycling. It encompasses multiple types of datasets including environmental, ecological, biological, isotopic, mineralogical, genomic, flux, and modeled data from water, vegetation, soil, and atmospheric matrices. The catalog will be available online and to the public. Therefore, publication of data through...
These data represent a one-time synoptic survey of sampled soils, pavement dust, and stream sediment in 10 urban watersheds in three regions of the United States (Pacific Northwest, northeast, and southeast) to evaluate sources of sediment and two groups of common urban contaminants: polycyclic aromatic hydrocarbons (PAHs) and metals. Analyses of samples from six of the watersheds included fallout radionuclides to facilitate identification of sediment sources to the streams. Scripts used in R to test selected explanatory variables for the urban contaminants using Generalize Additive Models (GAMs) are included. The data release also includes Geographic Information System (GIS) spatial layers that were developed for...
Core Research Center, cutting DZ13408, from well operated by AMERADA PETRRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "DZ13408", "API Num": "4304710033", "Operator": "AMERADA PETR", "Well Name": "1A UTE TRIBE", "Field": null, "State": "UT", "County": "UINTAH", "Thin Sec": "F", "Analysis": "F", "Latitude": "40.10197", "Longitude": "-109.76512", "coordinates_geohash": "9x1unhr6zm42", "Source": "FROM STATE RECORDS", "Min": "410", "Max": "6830", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/35250",...
Categories: Physical Item;
Tags: Holocene and Pleistocene(?),
Piedmont alluvium, undivided,
gravel,
sand,
soil
Core Research Center, cutting DZ00560, from well operated by CARTER OIL CORaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "DZ00560", "API Num": "4304720434", "Operator": "CARTER OIL CO", "Well Name": "1 USA (VERNAL UNIT)", "Field": "WILDCAT", "State": "UT", "County": "UINTAH", "Thin Sec": "F", "Analysis": "F", "Latitude": "40.30799", "Longitude": "-109.56811", "coordinates_geohash": "9x4j69ygjczw", "Source": "FROM STATE RECORDS", "Min": "90", "Max": "8894", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/30903",...
Categories: Physical Item;
Tags: Holocene and Pleistocene(?),
Piedmont alluvium, undivided,
gravel,
sand,
soil
Core Research Center, cutting HH01037, from well operated by TIPPERARY OILRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "HH01037", "API Num": "0500306001", "Operator": "TIPPERARY OIL", "Well Name": "1-32 STATE", "Field": null, "State": "CO", "County": "ALAMOSA", "Thin Sec": "F", "Analysis": "F", "Latitude": "37.670759", "Longitude": "-105.685048", "coordinates_geohash": "9wsy71f2pfkw", "Source": "FROM STATE RECORDS", "Min": "0", "Max": "8500", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/51157",...
Core Research Center, cutting BZ03227, from well operated by SHELLRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "BZ03227", "API Num": "4003305025", "Operator": "SHELL", "Well Name": "1 ENGLEBRECHT", "Field": "WILDCAT", "State": "SD", "County": "CUSTER", "Thin Sec": "F", "Analysis": "F", "Latitude": "43.507791", "Longitude": "-103.121681", "coordinates_geohash": "9xwxt2m568j6", "Source": "FROM STATE RECORDS", "Min": "315", "Max": "2850", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/3456",...
Categories: Physical Item;
Tags: Pleistocene,
Terrace gravel and alluvial-fan deposits,
gravel,
sand,
silt,
Core Research Center, cutting DZ15667, from well operated by COTTON PETROLEUM CORPRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "DZ15667", "API Num": "4304730159", "Operator": "COTTON PETROLEUM CORP", "Well Name": "1 BRUCHEZ", "Field": null, "State": "UT", "County": "UINTAH", "Thin Sec": "F", "Analysis": "F", "Latitude": "40.52978", "Longitude": "-109.80022", "coordinates_geohash": "9x1yt6jzj6tg", "Source": "FROM STATE RECORDS", "Min": "80", "Max": "4550", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/37467",...
Categories: Physical Item;
Tags: Upper Pleistocene,
Younger South Flank piedmont alluvium,
carbonate,
gravel,
sand,
Core Research Center, cutting DZ18908, from well operated by NATURAL GAS CORP. OF CALIF.Raw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "DZ18908", "API Num": "4304731198", "Operator": "NATURAL GAS CORP. OF CALIF.", "Well Name": "41-21-I FEDERAL", "Field": null, "State": "UT", "County": "UINTAH", "Thin Sec": "F", "Analysis": "F", "Latitude": "40.02131", "Longitude": "-109.89079", "coordinates_geohash": "9x1gemevnbzv", "Source": "FROM STATE RECORDS", "Min": "300", "Max": "5870", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/41879",...
Categories: Physical Item;
Tags: Holocene and Pleistocene(?),
Piedmont alluvium, undivided,
gravel,
sand,
soil
Winter climate change has the potential to have a large impact on coastal wetlands in the southeastern U.S. Warmer winter temperatures and reductions in the intensity of freeze events would likely lead to mangrove forest range expansion and salt marsh displacement in parts of the U.S. Gulf of Mexico and Atlantic coast. The objective of this research was to better understand some of the ecological implications of mangrove forest migration and salt marsh displacement. The potential ecological effects of mangrove migration are diverse ranging from important biotic impacts (e.g., coastal fisheries, land bird migration; colonial nesting wading birds) to ecosystem stability (e.g., response to sea level rise and drought;...
Winter climate change has the potential to have a large impact on coastal wetlands in the southeastern U.S. Warmer winter temperatures and reductions in the intensity of freeze events would likely lead to mangrove forest range expansion and salt marsh displacement in parts of the U.S. Gulf of Mexico and Atlantic coast. The objective of this research was to better understand some of the ecological implications of mangrove forest migration and salt marsh displacement. The potential ecological effects of mangrove migration are diverse ranging from important biotic impacts (e.g., coastal fisheries, land bird migration; colonial nesting wading birds) to ecosystem stability (e.g., response to sea level rise and drought;...
This data set presents attributes of floodplain ecosystem characteristics including floodplain soil denitrification, floodplain soil biogeochemistry, floodplain vegetation, floodplain sedimentation, floodplain and channel morphometry, stream discharge and water quality, floodplain climate, floodplain physiographic region, and catchment land cover. Attributes are associated with 18 floodplains of the Chesapeake Bay watershed. For many of these attributes, mean values are summaries of multiple measurements made within each floodplain site.
Categories: Data;
Tags: Maryland,
Pennsylvania,
USGS Science Data Catalog (SDC),
Virginia,
West Virginia,
In a study conducted by the U.S. Geological Survey (USGS) and the New Hampshire Department of Environmental Services, detectable concentrations of per- and polyfluoroalkyl substances (PFAS) were found in the soil at every site despite targeting locations with no known PFAS sources (Santangelo and others, 2022). The widespread distribution of PFAS concentrations in New Hampshire has since sparked critical interest into understanding whether recharge to groundwater contains significant concentrations of PFAS after infiltration through soils. To address this concern, the USGS implemented a pilot study designed to evaluate whether PFAS infiltrate through shallow soil into shallow groundwater. Five sites were selected...
Categories: Data;
Tags: Eastern United States,
Environmental Health,
Hydrology,
New Hampshire,
Northeast,
Final Report - Executive Summary: This final project report is prepared to summarize the research project titled “Assessing evapotranspiration rate changes for proposed restoration of the forested uplands of the Desert Landscape Conservation Cooperatives (LCC)” for the Desert LCC of the Bureau of Reclamation as a requirement for closing out the project. This report includes the scope of work, summary of research project, results, and conclusions.Among all of the components of the terrestrial water cycle, evapotranspiration (ET) consumes the largest amount of water. Accurate estimation of ET is very important to understand the influence of ET to the hydrologic response of recharge and runoff processes in the water...
Categories: Data,
Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2012,
ATMOSPHERE,
ATMOSPHERE,
ATMOSPHERIC WATER VAPOR,
ATMOSPHERIC WATER VAPOR,
A battery of questions was developed and applied to different stakeholders immersed in knowledge of the condition and the use of grazing of grasslands. One hundred people were surveyed amongst livestock producers (both from private ranches and from communal ejidos), and students and researchers at regional institutions involved in agricultural sciences in different states of Mexico: Coahuila, Durango, San Luis Potosí, and Jalisco. The objective of the survey was to determine aspects of stakeholders’ interpretation of the condition of grasslands in their region under conditions of extensive grazing, such as soil condition, harvest efficiency, vegetation condition, openness to community organizing of grazing, capacity...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Mexico,
Spanish,
cultural,
desertification,
economic,
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