606 research outputs found
Environmental planning for an Alaskan water-oriented recreational area
Completion Report
OWRT Agreement No. 14-31-0001-4056
Project No. B-026-ALASThis research focused initially on delineation of the proper procedures
to be applied when the state of Alaska, through the appropriate
agencies, selects and develops water-based recreation areas. The Nancy
Lakes recreational area was selected as a case study for testing these
procedures. This area is located approximately 106 km (66 road miles)
northwest of Anchorage along the Parks Highway (61°N,150°W). When the
research was begun in July of 1973, this area was determined to be
important to the future recreational needs of the residents of the
growing municipality of Anchorage as well as to travelers between
Fairbanks and Anchorage along the newly opened highway. Today, this
area is even more important as the new capital of the state of Alaska
will be located approximately 6 km (4 miles) east of Nancy Lakes.
In the summer of 1974, difficulties arose concerning the objectives
of the project and the reports to be generated. Therefore, a decision
was made to terminate the research at Nancy Lakes. A partial completion
report was compiled concerning the work completed to September 1, 1974.
This report was distributed to cooperators at the State of Alaska,
Department of Natural Resources, Division of Parks; the Sport Fish
Division of Alaska Department of Fish and Game, Palmer; and to the
Office of Water Resources Research, the predecessor of the Office of
Water Research and Technology.
The research has continued, focusing on the Tanana Lakes near
Fairbanks, Alaska, (64°N,146°N) with the cooperation of the Sport Fish
Division of the Alaska Department of Fish and Game, Fairbanks. These
lakes, located within 160 km (100 miles) of Fairbanks, are important to
the residents of Fairbanks, as well as to tourists driving to Fairbanks
from the 48 continguous states. Many Fairbanks residents have cottages
at one of the three largest of these, Harding, Birch, and Quartz Lakes.
Several youth groups have summer camps on these lakes; the U. S. Army
and the U. S. Air Force are currently sharing an extensive recreation
facility at Birch Lake; and the state park at Harding Lake is one of the
state's most utilized campgrounds.
The research on this lake group has focused on the variation in
productivity between these lakes due to differences in lake morphometry
and watershed characteristics, with some attempt to assess recreational
impacts on their water quality.The work upon which this completion report is based was supported
by funds provided by the U. S. Department of Interior, Office of Water
Research and Technology as authorized under the Water Resources Research
Act of 1964, Public Law 88-379, as amended. Matching funds were provided
by the State of Alaska, Department of Natural Resources, Division
of Parks; and Department of Fish and Game, Sport Fish Division
A Survey of Lentic Waters with Respect to Dissolved and Particulate Lead
Some of the strongest temperature inversions in the world occur at
Fairbanks, Alaska. Benson (1970) has reported that a temperature gradient
of 10 to 30C/1OO m is common in the winter inversions that form at
Fairbanks. Air pollution is especially severe during these inversions
when it is accompanied by the formation of ice crystals in the air, a
condition known as ice fog. This phenomenon occurs when the temperature
drops below -20F (-35C) (Benson, 1970), and it intensifies with time if
the inversion is not broken.
The ice crystals in this fog have been found to adsorb dust and gasses,
including the lead halides which are present in the air as a result of the
combustion of tetraethyl lead and/or other lead-hydrocarbon compounds used
as anti-knock additives in automotive gasoline. Lazrus et al. (1970) have
found lead concentrations in precipitation to be highly significantly correlated
with the amount of gasoline used in the area sampled.
There are two factors that bring the concentration of lead to high
levels in ice fogs. Evaporation of the ice crystals tends to concentrate
pollutants in the air mass, especially over the core area of the city
where precipitation is retarded by the heating effect of the city. Also,
during the extreme cold weather accompanying this phenomenon, many people
allow their cars to idle when they are parked to increase performance and
for reasons of personal comfort.
Eventually, much of the pollutants suspended in the ice fog is precipitated and causes unnaturally high levels of lead in the snow. (Winchester et al., 1967). It is suspected that some of this particulate
lead collected in the snow may be carried along with the associated surface
runoff into 1entic (standing) surface waters during thawing. The
objectives of this project were:
1. to measure the amount of dissolved and particulate lead in a
number of selected 1entic waters in the Fairbanks area, and
2. to measure the amount of lead that has been incorporated into net plankton organisms located in the selected lentic waters.The work upon which this report is based was supported by funds (Project A-035-ALAS) provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the
Water Resources Act of 1964, as amended
Nutrient chemistry of a large, deep lake in subarctic Alaska
Project Officer
Eldor W. Schallock
Assessment and Criteria Development Division
Corvallis Environmental Research Laboratory
Corvallis, Oregon 97330;Corvallis Environmental Research Laboratory
Office of Research and Development
U. S. Environmental Protection Agency
Corvallis, Oregon 97330; R800276The primary objective of this project was to assess the state of the
water quality of Harding Lake, and to attempt to predict the effects of
future development within its watershed. Since the major effect of degradation
of water quality due to human activity is the promotion of nuisance
growths of plants, the major emphasis was placed on measurements of plant
growth and concentrations of the major nutrients they require. Planktonic
algal growth was found to be low, below 95.6 gm/m2/year, and the growth of
submerged rooted plants was found to be relatively less important at approximately
1.35 gm/m2/year. Measurements of the growth of attached algae were
not conducted, therefore the relative importance of their growth is currently
unknown.
A model for predicting the effect of future real estate development in
the watershed was modified and applied to this lake. This model adequately
describes current water quality conditions, and is assumed to have some
predictive ability, but several cautions concerning application of this
model to Harding Lake are discussed.
A secondary objective was to study the thermal regime of a deep subarctic
lake. Intensive water temperature measurements were made throughout
one year and less intensive measurements were conducted during two additional
years. The possibility that this lake may occasionally stratify thermally
under the ice and not mix completely in the spring was discovered. The
implications of this possibility are discussed for management of subarctic
lakes. Hydrologic and energy budgets of this lake are attempted; the annual
heat budget is estimated at 1.96 x 104 ± 1.7 x 103 cal/cm2.
The results of a study of domestic water supply and waste disposal
alternatives in the watershed, and the potential for enteric bacterial contamination
of the lake water are presented. Limited work on the zooplankton,
fishes, and benthic macroinvertebrates of this lake is also presented
Evaluation of the trophic types of several Alaskan lakes by assessment of the benthic fauna
Public Law 92-500 (1972) which amends the Federal Water Pollution
Control Act contains Section No. 314 entitled Clean Lakes which gives
each state a mandate to "... prepare or establish ... an identification
and classification according to eutrophic condition of all publicly owned
fresh water lakes in such state . . . ." This mandate presents an awesome
task to the State of Alaska which contains millions of lakes which must be
evaluated according to the interpretation of this law.
It was the intent of this project to examine the application of a biological index of eutrophy to several Alaskan lakes by comparing benthic macroinvertebrate faunal distribution to selected chemical and physical indices of trophic state. The investigator chose to consider "indicator
organisms" as the focus of the study and found this concept to be interestingly
difficult to apply.The work upon which this report is based was supported in part by funds (A-046-ALAS) provided by the United States Department of the Interior, Office of Water Research and Technology, as authorized under the Water
Resources Act of 1964, as amended
Laboratory Rearing Experiments on Artificially Propagated Inconnu (Stenodus leucichthys)
The work upon which this report is based was supported by the State
of Alaska through the University of Alaska in cooperation with a project
supported in part by funds (Proj. A-041-ALAS) provided by the United
States Department of the Interior, Office of Water Resources Research,
as authorized under the Water Resources act of 1964, as amended
Immunological Changes after Cancer Treatment and Participation in an Exercise Program
Purpose: The purpose of this investigation was to evaluate the impact of undertaking peripheral blood stem cell transplantation (PBST) on T-cell number and function, and to determine the role of a mixed type, moderate intensity exercise program in facilitating the recovery of T-cell number and function. Methods: Immunological measures of white blood cell, lymphocyte, CD3+, CD4+, and CD8+ counts, and CD3+ cell function were assessed pretransplant (PI), immediately posttransplant (PII), and 1 month (I1), 2 months (I2) and 3 months (PIII) posttransplant. After PII, 12 patients were divided equally into a control group (CG) or exercise intervention group (EG). Results: Lower total T-cell, helper T-cell, and suppressor T-cell counts (P < 0.01), as well as lower T-cell function (P < 0.01), when compared with normative data, were found at PI. More specifically, 88% of the group had CD3+, CD4+, and CD8+ counts that were more than 40%, 20%, and 50% below normal at PI, respectively. Undertaking a PBST caused further adverse changes to the total leukocyte, lymphocyte, CD3+, CD4+ and CD8+ count, and the helper/suppressor ratio. Although CD8+ counts had returned to normal by PIII, CD3+, CD4+, and the CD4+/CD8+ ratio remained significantly lower than normative data (P < 0.01), with 66%, 100%, and 100% of the subject group reporting counts and ratios, respectively, below the normal range. Conclusion: The PBST patients were immunocompromised before undertaking the transplant, and the transplant procedure imposed further adverse changes to the leukocyte and lymphocyte counts. The leukocyte and CD8+ counts returned to normal within 3 months posttransplant; however, the other immunological parameters assessed demonstrated a delayed recovery. Although participation in the exercise program did not facilitate a faster immune cell recovery, neither did the exercise program hinder or delay recovery
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