Filters: Tags: Monitoring 2-Standardized Stream and Lake Information (X)
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At sites where petrochemical releases have occurred comparatively recently (i.e., over the last 20 years), explicit age-dating is a viable approach. However, differentiating among multiparty contamination at sites with several decades of history may mandate a different allocation strategy, especially when there is an uncoordinated body of environmental data. At a location where a refinery operated for 11 months during World War II, and which has been used as a fuel distribution terminal over the ensuing 60 years, regulatory interest was triggered in 1997 when a sheen was detected discharging into the adjacent Yukon River. Our investigation combined disparate forensic tools with data visualization software to establish...
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Tags: MONITORING 5-PHYSICAL SCIENCE,
Monitoring 2-Standardized Stream and Lake Information
Categories: Publication;
Types: Citation;
Tags: Monitoring 2-Standardized Stream and Lake Information
Categories: Publication;
Types: Citation;
Tags: Monitoring 2-Standardized Stream and Lake Information
In Canada's subarctic?the boreal ecosystem that spans most of mainland Canada?the temperature is climbing, and the snowpack is thinning. Previous research has shown that snow is disappearing even faster than sea ice.
This study systematically analyzes long-term (1973–2011) daily flow data collected near the Mackenzie basin outlet. It clearly defines the variability, extreme events, and changes in daily flow records over the past 4 decades. The results of this study accurately determine the seasonal cycle of river discharge, including the range of highest and lowest daily flows. The interannual variation of daily flow is generally small in the cold season, highest in the spring melt period, and large over the summer months mainly due to rainfall storm activities and associated floods. This study also shows that Mackenzie River flow regime has changed over the past 4 decades due to climate variation, with the advance of snowmelt...
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Tags: Monitoring 2-Standardized Stream and Lake Information
This report summarizes instream flow protection and related activities of the Alaska Department of Fish and Game in 2012. The status of reservation of water applications by other agencies and the private sector in Alaska is also presented.
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Tags: Monitoring 2-Standardized Stream and Lake Information
OVERVIEW This report contains water-quality data collected from 84 sites in Tanana River basin during water years 2004 through 2006 (October 2003 through September 2006) as part of a cooperative study between the U.S. Geological Survey (USGS) and Alaska Department of Environmental Conservation (ADEC) Alaska Monitoring and Assessment Program (AKMAP), supported in part through the U.S. Environmental Protection Agency (USEPA) Office of Water, Cooperative Assistance Agreement X7-97078801. A broad range of chemical analyses are presented for 93 sets of samples collected at 59 tributaries to the Tanana River and at 25 locations along the mainstem. These data are to provide a means to assess baseline characteristics and...
Categories: Data,
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Tags: Monitoring 2-Standardized Stream and Lake Information
Categories: Data,
Publication;
Types: Citation,
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Shapefile;
Tags: Monitoring 2-Standardized Stream and Lake Information
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.
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Tags: Monitoring 2-Standardized Stream and Lake Information
The Yukon River Inter-Tribal Watershed Council and the U.S. Geological Survey developed a water-quality monitoring program to address a shared interest in the water quality of the Yukon River and its relation to climate. This report contains water-quality data from samples collected in the Yukon River Basin during water years 2006 through 2008. A broad range of chemical analyses from 44 stations throughout the YRB are presented. On August 8, 2009 the USGS signed a Memorandum of Understanding with the Yukon River Inter-Tribal Watershed Council representing the culmination of 5 years of dedicated efforts to forge a working collaboration and partnership with expectations of continuing into the foreseeable future. The...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Monitoring 2-Standardized Stream and Lake Information
Categories: Data,
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Types: Citation,
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OGC WMS Layer,
Shapefile;
Tags: Monitoring 2-Standardized Stream and Lake Information
We applied nonparametric statistical techniques to historical streamflow data from five glacierized and four nonglacierized watersheds in southwest Yukon and northwestern British Columbia, Canada, to determine whether rivers with and without catchment glacial cover respond in significantly different ways to a warming climate. The analysis was posed in terms of contrasts between the two groups with respect to long-term trends in annual time series of total river flow volume. We found that glacier-fed rivers grew larger and nival streams progressively smaller over the historical record under an observed regional warming trend. Although some of these trend effects are subtle, the overall result was statistically significant...
Categories: Data,
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Types: Citation,
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Map Service,
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OGC WMS Layer,
Shapefile;
Tags: Monitoring 2-Standardized Stream and Lake Information
In montane regions, ongoing and future shrinkage of glacier cover, coupled with a shortening snow cover period, can profoundly alter river hydrology but also lead to the release of airborne contaminants, such as mercury (Hg), deposited and stored in snow and ice. We used field data coupled with hydrological and atmospheric models to estimate and compare the contributions of Hg from snow/glacier melt and from direct atmospheric deposition, to Kusawa Lake, in subarctic Yukon, Canada. The estimated net Hg accumulation rate in supraglacial snow is 0.55 mg m-2 a-1. The modeled net atmospheric flux, including wet+dry deposition, is ~6 times larger, averaging 3.4 mg m-2 a-1, and comparable to the area-averaged meltwater...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
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Tags: Baseline 3-Hydrological datasets,
Monitoring 2-Standardized Stream and Lake Information
Water samples were collected biweekly from the Chena River, Alaska, during 2005-2006 for analysis of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), total dissolved carbohydrate (TCHO), including monosaccharide (MCHO) and polysaccharide (PCHO), particulate organic carbon (POC) and its isotopic compositions, and Si(OH) sub(4). Carbon species exhibit strong temporal variations with elevated DOC, POC, and TCHO but depleted DIC and Si(OH) sub(4) during the spring freshet and decreased DOC, POC, and TCHO but elevated DIC and Si(OH) sub(4) concentrations under winter ice. Organic matter is mostly derived from surface soil leaching, whereas DIC and Si(OH) sub(4) are associated with groundwater and mineral...
Categories: Publication;
Types: Citation;
Tags: Monitoring 2-Standardized Stream and Lake Information
Categories: Publication;
Types: Citation;
Tags: Baseline 3-Hydrological Datasets,
Monitoring 2-Standardized Stream and Lake Information
Categories: Publication;
Types: Citation;
Tags: Monitoring 2-Standardized Stream and Lake Information
This report describes the results of the 2006 field season for the Central Alaska Network (CAKN) flowing waters monitoring program. The key objectives for the 2006 field season were to assess the logistics involved in various sampling approaches and to collect data from a variety of streams as a way to begin to determine the range of natural variability for various candidate biological, chemical and physical metrics. I was able to collect data at 13 study sites located throughout WRST. Two of these sites were visited in two different seasons (summer and autumn) to assess seasonal variability, which was substantial for invertebrates and diatoms and moderate for water chemistry parameters. At one of these sites, multiple...
Categories: Publication;
Types: Citation;
Tags: Monitoring 2-Standardized Stream and Lake Information
The U.S. Geological Survey and the Alaska Department of Transportation and Public Facilities undertook a cooperative multiphase study of streambed scour at selected bridges in Alaska beginning in 1994. Of the 325 bridges analyzed for susceptibility to scour in the preliminary phase, 54 bridges were selected for a more intensive analysis that included site investigations. Cross- section geometry and hydraulic properties for each site in this study were determined from field surveys and bridge plans. Water- surface profiles were calculated for the 100- and 500-year floods using the Hydrologic Engineering Center's River Analysis System and scour depths were calculated using methods recommended by the Federal Highway...
Categories: Publication;
Types: Citation;
Tags: Monitoring 2-Standardized Stream and Lake Information
This product is the Water Resources Data for the 2003 water year for Alaska and consists of records of stage, discharge, and water quality of streams; stages of lakes; and water levels and water quality of ground water. This volume contains records for water discharge at 118 gaging stations; stage or contents only at 4 gaging stations; water quality at 28 gaging stations; and water levels for 53 observation wells. Also included are data for 66 crest-stage partial-record stations. Additional water data were collected at various sites not involved in the systematic data- collection program and are published as miscellaneous measurements and analyses. Some data collected during 2003 will be published in subsequent...
Categories: Publication;
Types: Citation;
Tags: Monitoring 2-Standardized Stream and Lake Information
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