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We report chemical analyses of stream-water, stream-sediment, soil, soil-water, bedrock, and vegetation samples collected from the headwaters of the Delta River (Tangle Lakes District, Mount Hayes 1:250,000-scale quadrangle) in east-central Alaska for the period June 20-25, 2006. Additionally, we present mineralogic analyses of stream sediment, concentrated by panning. The study area includes the southwestward extent of the Bureau of Land Management (BLM) Delta River Mining District (Bittenbender and others, 2007), including parts of the Delta River Archeological District, and encompasses an area of about 500 km2(approximately bordered by the Denali Highway to the south, near Round Tangle Lake, northward to the...
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To test the response of the dry Kluane boreal forest ecosystem (Yukon, Canada) to increased rainfall as predicted from climate change scenarios I irrigated three 1.5 ha forest stands from 1995-1999, to double baseline summer rainfall levels. I tested if various biotic and abiotic components of this ecosystem would react to the reduction of the summer water deficit relative to three control stands. I predicted that in response to irrigation: (1) growth (or biomass) in some species of plants would increase, (2) red-backed voles would in turn increase in numbers with greater plant-food availability because they are food-limited herbivores, (3) mushroom biomass would increase, (4) decomposition would increase, and hence...
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Many northern lake-rich regions are undergoing pronounced hydrological change, yet inadequate knowledge of the drivers of these landscape-scale responses hampers our ability to predict future conditions. We address this challenge in the thermokarst landscape of Old Crow Flats (OCF) using a combination of remote sensing imagery and monitoring of stable isotope compositions of lake waters over three thaw seasons (2007?2009). Quantitative analysis confirmed that the hydrological behavior of lakes is strongly influenced by catchment vegetation and physiography. Catchments of snowmelt-dominated lakes, typically located in southern peripheral areas of OCF, encompass high proportions of woodland/forest and tall shrub vegetation...
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This document presents the results of surface-water-quality data retrievals for Yukon-Charley Rivers National Preserve from six of the United States Environmental Protection Agency's (EPA) national databases: (1) Storage and Retrieval (STORET) water quality database management system; (2) River Reach File (RF3); (3) Industrial Facilities Discharge (IFD); (4) Drinking Water Supplies (DRINKS); (5) Flow Gages (GAGES); and (6) Water Impoundments (DAMS). The document provides: (1) a complete inventory of all retrieved water quality data, water quality stations, and the entities responsible for data collection; (2) descriptive statistics and appropriate graphical plots of water quality data characterizing annual and seasonal...
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Over the past fifty years Alaska has experienced an increase in mean annual temperature. This warming may be causing significant changes in hydrology and permafrost dynamics. In recent decades, Native Americans and land managers have reported losses of water bodies and surface water area in interior Alaska. We conducted a study to determine the degree to which these informal observations were representative of a regional trend in surface water area loss. This study examines closed-basin water bodies in nine regions across Alaska: 1) Copper River Basin, 2) Talkeetna, 3) Tetlin National Wildlife Refuge, 4) Denali National Park, 5) Innoko Flats National Wildlife Refuge, 6) Minto Flats State Game Refuge, 7) Stevens...
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Growing season CH4 fluxes were monitored over a two year period following the start of ecosystem-scale manipulations of water table position and surface soil temperatures in a moderate rich fen in interior Alaska. The largest CH4 fluxes occurred in plots that received both flooding (raised water table position) and soil warming, while the lowest fluxes occurred in unwarmed plots in the lowered water table treatment. A combination of treatment and soil hydroclimate variables explained more than 70% of the variation in ln-transformed CH4 fluxes, with mean daily water table position representing the strongest predictor. We used quantitative PCR of the -subunit of mcr operon to explore the influence of soil climate...
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The Chulitna River basin in southwest Alaska drains an area of about 1,160 square miles, with the lower 158 square miles of the basin in Lake Clark National Park and Preserve. Water from this basin influences Lake Clark ecosystems that support salmon that, in part, sustain the Bristol Bay fishery. An area of about 391 square miles in the upper part of the Chulitna River basin has been staked for mining development (1,670 claims), and a proposed large scale copper-gold-molybdenum mine (Pebble Mine) lies adjacent to the Chulitna River drainage. The U.S. Geological Survey in cooperation with the National Park Service conducted a water-quality assessment of the Chulitna River from October 2009 to June 2012. Discrete...
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The Yukon River basin is a vast and diverse ecosystem covering more than 330,000 square miles, an area larger than Texas. Approximately 126,000 people live within the basin and depend on the Yukon River and its tributaries for drinking water, commerce, and recreational and subsistence fish and game resources. Much of the Yukon River basin is underlain by permafrost containing vast amounts of organic carbon and nutrients. Recent climatic warming of the basin has resulted in lengthening of the growing season, melting of permafrost, deepening of the soil active layer, drying of upland soils, and shrinking of wetlands. These mostly terrestrial effects also affect the hydrology of the basin, changing the timing, magnitude,...
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A stream water temperature monitoring project has been initiated by the U.S. Fish and Wildlife Service, Office of Subsistence Management, at 29 stream locations throughout Alaska. Temperature monitoring will augment fisheries studies currently being conducted at these locations. The temperature monitoring project is being developed to provide consistent temperature data, from standard collection and reporting methods, for subsistence fishery management and to evaluate climate influence on stream temperatures and fish habitat. Stream water and air temperature loggers were checked for accuracy and distributed along with deployment instructions and data sheets to 29 sampling locations in 2008 and 2009. Sampling...
map background search result map search result map Baseline Water Quality Data Inventory and Analysis: Yukon-Charley Rivers National Preserve Effects of water addition on biotic and abiotic components of a dry boreal forest in the Yukon Using Remote Sensing to Examine Changes of Closed-basin Surface Water: Area in Interior Alaska from 1950-2002 Energy and Water Cycles in a High-Latitude, North-Flowing River System A semi-automated tool for surface water mapping with RADARSAT-1 Arsenic speciation and mobility in surface water at Lucky Shot Gold Mine, Alaska Short-term response of methane fluxes and methanogen activity to water table and soil warming manipulations in an Alaskan peatland Water and sediment quality of the Yukon River and its tributaries, from Eagle to St. Marys, Alaska, 2002-2003 Total particulate carbon (TPC), particulate inorganic carbon (PIC), particulate organic carbon (POC), and total particulate nitrogen (TPN) Water and sediment quality in the Yukon river Basin, Alaska, during water year 2004 An Overview and Preliminary Data of a Five-year Water Quality Study of the Yukon River Water Resources Stewardship Report, Denali National Park and Preserve Regional Geochemical Results from Analyses of Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska. Prepared in cooperation with Alaska Department of Natural Resources Public Review of the Draft Yukon Water Strategy What We Heard: A Summary of Comments Controls on water balance of shallow thermokarst lakes and their relations with catchment characteristics: a multi-year, landscape-scale assessment based on water isotope tracers and remote sensing in Old Crow Flats, Yukon (Canada) Water-quality and flow data, Chulitna River basin, southwest Alaska, October 2009-June 2012 Deciduous trees are a large and overlooked sink for snowmelt water in the boreal forest Determining Canadian water utility preparedness for the impacts of climate change INTEGRATED PEST MANAGEMENT PLAN FOR ERADICATING ELODEA FROM WATER BODIES IN INTERIOR ALASKA January 2017 Short-term response of methane fluxes and methanogen activity to water table and soil warming manipulations in an Alaskan peatland Arsenic speciation and mobility in surface water at Lucky Shot Gold Mine, Alaska Regional Geochemical Results from Analyses of Stream-Water, Stream-Sediment, Soil, Soil-Water, Bedrock, and Vegetation Samples, Tangle Lakes District, Alaska. Prepared in cooperation with Alaska Department of Natural Resources A semi-automated tool for surface water mapping with RADARSAT-1 Controls on water balance of shallow thermokarst lakes and their relations with catchment characteristics: a multi-year, landscape-scale assessment based on water isotope tracers and remote sensing in Old Crow Flats, Yukon (Canada) INTEGRATED PEST MANAGEMENT PLAN FOR ERADICATING ELODEA FROM WATER BODIES IN INTERIOR ALASKA January 2017 Effects of water addition on biotic and abiotic components of a dry boreal forest in the Yukon Baseline Water Quality Data Inventory and Analysis: Yukon-Charley Rivers National Preserve Water-quality and flow data, Chulitna River basin, southwest Alaska, October 2009-June 2012 Water Resources Stewardship Report, Denali National Park and Preserve Using Remote Sensing to Examine Changes of Closed-basin Surface Water: Area in Interior Alaska from 1950-2002 Public Review of the Draft Yukon Water Strategy What We Heard: A Summary of Comments Water and sediment quality of the Yukon River and its tributaries, from Eagle to St. Marys, Alaska, 2002-2003 Total particulate carbon (TPC), particulate inorganic carbon (PIC), particulate organic carbon (POC), and total particulate nitrogen (TPN) Water and sediment quality in the Yukon river Basin, Alaska, during water year 2004 An Overview and Preliminary Data of a Five-year Water Quality Study of the Yukon River Energy and Water Cycles in a High-Latitude, North-Flowing River System Determining Canadian water utility preparedness for the impacts of climate change Deciduous trees are a large and overlooked sink for snowmelt water in the boreal forest