Skip to main content
Advanced Search

Filters: Types: Downloadable (X) > Extensions: Shapefile (X) > Types: Citation (X)

993 results (198ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
This report contains water-quality and sediment-quality data from samples collected in the Yukon River Basin from March through September during the 2004 water year (WY). Samples were collected throughout the year at five stations in the basin (three on the main stem Yukon River, one each on the Tanana and Porcupine Rivers). A broad range of physical, chemical, and biological analyses are presented.
thumbnail
This report contains water-quality and sediment-quality data from samples collected in the Yukon River Basin from March through September during the 2004 water year (WY). Samples were collected throughout the year at five stations in the basin (three on the main stem Yukon River, one each on the Tanana and Porcupine Rivers). A broad range of physical, chemical, and biological analyses are presented.
thumbnail
This report contains water-quality and sediment-quality data from samples collected in the Yukon River basin from March through September during the 2002 water year (WY). Samples were collected throughout the year at five stations in the basin (three on the main stem Yukon River, one each on the Tanana and Porcupine Rivers ). A broad range of physical, chemical, and biological analyses are presented.
thumbnail
The Yukon River Basin, which encompasses 330,000 square miles in northwestern Canada and central Alaska (Fig. 1), is one of the largest and most diverse ecosystems in North America. The Yukon River is also fundamental to the ecosystems of the eastern Bering Sea and Chukchi Sea, providing most of the freshwater runoff, sediments, and dissolved solutes. Despite its remoteness and perceived invulnerability, the Yukon River Basin is changing. For example, records of air temperature during 1961- 1990 indicate a warming trend of about 0.75 °C per decade at latitudes where the Yukon River is located. Increases in temperature will have wide-ranging effects on permafrost distribution, glacial runoff and the movement of carbon...
thumbnail
The history of water resources management in the Yukon has been characterized by conflict. This problem is due to the failure to address the interrelationships between water and land resources. Although many parts of the Yukon remain largely undisturbed wilderness areas, development pressures place increasing demands on Territorial water resources. To ensure these stresses do not degrade Yukon waters to the extent common in many Canadian regions, a reevaluation of the legal and administrative arrangements for water management in the Yukon is required. A majority of the legislation pertaining to water management in the Yukon was introduced in the 1970s and is unable to address many contemporary issues. The recent...
This report describes the quality of nutrient data in stream and ground-water samples collected in 52 NAWQA study units during water years 1992-2001 based on an analysis of contamination bias and sampling variability. The results of this QC analysis are compared to characteristics of the environmental data and to national water-quality standards and criteria to assess the potential effects of bias and variability on interpretation of the environmental data. The NAWQA study units that provided the QC data represent a broad array of hydrologic conditions in the 48 contiguous States and Alaska and Hawaii. The data were aggregated into a national data set during the spring of 2002 and were extensively reviewed.
thumbnail
Summary: "Little is known about natural attenuation of chlorinated solvents in subarctic ground water. This study aimed to better understand the biogeochemistry and microbiology associated with naturally occurring processes of contaminent removal at two hydrologically diverse sites near Fairbanks, Alaska. Six Mile Village, located several km north of the Tanana River, is hydrologically stable, experiencing minor fluctuations in ground-water levels. Fort Wainwright is located adjacent to the Chena River and is hydrologically dynamic, experiencing seasonal flow reversals and substantial fluctuations in water-table elevations. By comparing data collected seasonally and with data collected at the two sites, I determined...
thumbnail
A suite of subglacial water-pressure records from the 1996 summer field season at Trapridge Glacier, Yukon Territory, Canada, discloses a hydraulic event that cannot readily be explained by known forcings. We suggest that these records indicate covert failure of the pressure sensors caused by at least one large water-pressure pulse. The sign and magnitude of the pulse appears to have varied spatially and the pulse duration was less than the 2 min sampling interval of our data loggers. Laboratory experiments support this interpretation and indicate that the pulse magnitude exceeded 900 m of hydraulic head, roughly 15 times the ice-overburden pressure. Within glaciers, large water-pressure pulses can be generated...
thumbnail
This report contains water-quality and sediment-quality data from samples collected in the Yukon River Basin from March through September during the 2004 water year (WY). Samples were collected throughout the year at five stations in the basin (three on the main stem Yukon River, one each on the Tanana and Porcupine Rivers). A broad range of physical, chemical, and biological analyses are presented.
thumbnail
The article focuses on the snowpack conditions in the Pelly river watershed Yukon, Canada along with the level of snow water and its equivalence to no snow at Hoole river, Canada. (Copyright applies to all Abstracts.)
thumbnail
The suite of measurement methods available to characterize fluxes between groundwater and surface water is rapidly growing. However, there are few studies that examine approaches to design of field investigations that include multiple methods. We propose that performing field measurements in a spatially telescoping sequence improves measurement flexibility and accounts for hydrologic scale while still allowing for parsimonious experimental design. We applied this spatially telescoping approach in a study of ground water-surface water (GW-SW) interaction during base flow conditions along Lucile Creek, located near Wasilla, Alaska. Catchment-scale data, including channel geomorphic indices and hydrogeologic transects,...
thumbnail
In this policy perspective, we outline several conditions to support effective science–policy interaction, with a particular emphasis on improving water governance in transboundary basins. Key conditions include (1) recognizing that science is a crucial but bounded input into water resource decision-making processes; (2) establishing conditions for collaboration and shared commitment among actors; (3) understanding that social or group-learning processes linked to science–policy interaction are enhanced through greater collaboration; (4) accepting that the collaborative production of knowledge about hydrological issues and associated socioeconomic change and institutional responses is essential to build legitimate...
thumbnail
In order to identify areas within the Mississipi River Basin (MRB) where implementing wildlife conservation actions could potentially provide the highest benefit to both local waters and the Gulf of Mexico the Miss. River Basin/Gulf Hypoxia Initiative identified a "Water Quality Priority Zone". This provisional zone of interest represents HUC-8 watersheds having the highest potential for nutrient export from agricultural sources (using nitrogen as a surrogate). The potential for nutrient export was determined using the 2002 SPARROW Mississippi/Atchafalaya River Basin Model and cropland data from the 2013 USDA-NASS Cropland Data Layer. As the results from the SPARROW model are somewhat dated (ca. 2002), we incorporated...
map background search result map search result map Water Quality Priority Zone (Draft - 2014) Using Water Isotope Tracers to Investigate Past and Present Water Balance Conditions in the Old Crow Flats, Yukon Territory Final report, water resources inventory and assessment, Yukon Flats National Wildlife Refuge (Water Years 1993-1998) Natural attenuation of chlorinated solvents in subarctic ground water Peel River Basin Water Quality Report Ground-water age and its water-management implications, Cook Inlet Basin, Alaska Spatially telescoping measurements for characterization of ground water - surface water interactions along Lucile Creek, Alaska Water and sediment quality in the Yukon River basin, Alaska, during water year 2003 Water and sediment quality in the Yukon River basin, Alaska, during water year 2002 Water and Sediment Quality in the Yukon River Basin, Alaska, During Water Year 2004 Water and sediment quality in the Yukon River basin, Alaska, during water year 2004 Water Quality in the Yukon River Basin Yukon Water An Assesment of climate Change Vulnerabilities Evidence for extreme pressure pulses in the subglacial water system Quality of Nutrient Data from Streams and Ground Water Sampled during Water Years 1992-2001 Are the Western water shrew (Sorex navigator) and American water shrew (Sorex palustris) morphologically distinct? Yukon Snow Survey Bulletin & Water Supply Forecast Are the western water shrew (Sorex navigator) and American water shrew (Sorex palustris) morphologically distinct? Evidence for extreme pressure pulses in the subglacial water system Natural attenuation of chlorinated solvents in subarctic ground water Spatially telescoping measurements for characterization of ground water - surface water interactions along Lucile Creek, Alaska Using Water Isotope Tracers to Investigate Past and Present Water Balance Conditions in the Old Crow Flats, Yukon Territory Yukon Snow Survey Bulletin & Water Supply Forecast Final report, water resources inventory and assessment, Yukon Flats National Wildlife Refuge (Water Years 1993-1998) Ground-water age and its water-management implications, Cook Inlet Basin, Alaska Quality of Nutrient Data from Streams and Ground Water Sampled during Water Years 1992-2001 Peel River Basin Water Quality Report Yukon Water An Assesment of climate Change Vulnerabilities Are the Western water shrew (Sorex navigator) and American water shrew (Sorex palustris) morphologically distinct? Are the western water shrew (Sorex navigator) and American water shrew (Sorex palustris) morphologically distinct? Water and sediment quality in the Yukon River basin, Alaska, during water year 2003 Water and sediment quality in the Yukon River basin, Alaska, during water year 2002 Water and Sediment Quality in the Yukon River Basin, Alaska, During Water Year 2004 Water and sediment quality in the Yukon River basin, Alaska, during water year 2004 Water Quality in the Yukon River Basin Water Quality Priority Zone (Draft - 2014)