David F. Meyer, Alaska
Section AWRA South-Central-Region Director
Welcome to the South-Central Region of the Alaska Section.
This page announces upcoming sessions of the Brown Bag Lunch Meetings.
We can easily expand it to include additional information, as it becomes
available. Please feel free to send feedback or suggestions.
The lunch meetings are held on the third Wednesday of
each month, September through May. The annual state meeting, normally
held in April of each year, will be superceded this year by the national
specialty meeting. The title and theme of the conference will be: "Water
Resources in Extreme Environments". Please visit the announcement
on the National AWRA web site. The Conference Chair is Jim
Thrall. The Technical Chair is Doug
Kane. If you would like to help with this conference, please send
email to Doug or Jim.
Lunch meetings are held in the 16th floor conference
room of the Denali Towers, noon to 1:00 PM. Denali Towers are at 2550
Denali Street, between Fireweed Lane and Northern Lights Blvd.
The south-central region membership includes faculty,
staff, and students of the University of Alaska Anchorage, federal, state,
and municipal government, and private industry water-resource professionals.
We hope you can come and bring a colleague.
Fall 1999/Spring 2000 Brown Bag Lunch Meeting Agenda
October 20, 1999, Christy Miller, of the Alaska
Department of Community & Economic Development will discus the Interagency
Hydrology Committee, Flood Coordination Committee plans and goals.
This will be a round-table discussion rather than the normal lecture
November 17, 1999, Scott Wheaton, Municipality of
Anchorage, Department of Public Works, Anchorage Stream Mapping Program
This study was designed to determine whether the prized rainbow
trout populations of the Alagnak National Wild River and the various
streams, lakes, and tributaries of the watershed consist of a single
population with interbreeding spawning groups, or whether there are discrete,
independent spawning populations. Another goal was to describe any variations
in migration patterns among possible population groups. During 1997 and
1998, 133 adult rainbow trout over 440 mm were radio-tagged in the Alagnak
River drainage and radio-tracked for various periods until March 1999.
Range of the total detected upstream and downstream movement varied between
less than 1 km to 122 km. The telemetry data indicate that multiple migratory
and non-migratory groups may exist. Migratory groups apparently move
independently, suggesting different life-history patterns. Rainbow trout
within the watershed may have evolved observed seasonal movement patterns
to optimize food availability during the summer and thermal refugia in
the winter. This work is helping to establish a new paradigm for rainbow
trout population structure and movement patterns in southwest Alaska
and could have significant management implications.
December 15, 1999, Julie Meka, USGS, Biological
Resources Division (Julie_Meka@usgs.gov) Rainbow trout population ecology
in a southwest Alaska watershed
Abstract: Cooper Creek is a 49 square mile watershed
tributary to the Kenai River near Cooper Landing Alaska. This watershed
received considerable placer mining use starting in the late 1800's and continuing
into this century. In 1957 Chugach Electric Association received a permit to develop
a hydroelectric project on Cooper Lake within the watershed.
This project diverts water from Cooper Lake down into Kenai
Lake for generating power. This project is likely to start its
FERC relicensing process within the next two years. Much of the
project area lies on National Forest lands. In preparation for
this pending relicensing, the Forest Service has undertaken a Watershed
Analysis to try to better understand processes and resources within
the watershed and potential changes that have occurred. This presentation
looks primarily at the hydrologic regime within the watershed and
discusses possible effects in changes to this regime.
January 19, 2000, Dave Blanchet, U.S. Forest
Service, Watershed Analysis of the Cooper Creek Watershed
The Municipality of Anchorage Department of Health and
Human Services(DHHS) is charged with regulating development of
private on-site water and wastewater systems for areas outside
of the Anchorage Water and Wastewater Utility service area. The
Municipality collects data on nitrate in private wells as part
of the Health Authority Approval process at the time any property
with a private well changes hands. Nitrate occurence is thought
to be indicative of wastewater influence in the groundwater, and
is a regulated contaminant with respect to State of Alaska drinking
water standards, based on U.S. EPA criteria. DHHS retained Montgomery
Watson to map nitrate occurrence in wells throughout Anchorage,
and seek means to identify areas at-risk for future nitrate occurrence.
Nitrate occurence was compared to certain types of hydrogeologic
settings, types of well construction, and development density through
statistical analysis, as allowed by available data. Selected areas
of rural residential Anchorage were identified for in-depth analysis,
with detailed comparison of nitrate occurence to interpretations
of local hydrogeology from well log information. Historic data
was insufficient to develop a reliable model of vulnerability of
wells to nitrate occurrence. The analysis was augmented with additional
field work in the Scimitar subdivision in the Peters Creek area
of Anchorage to overcome concerns regarding use of historic data.
The U.S. Geological Survey provided additional assistance in characterizing
aspects of chemical water quality of sampled wells, providing insight
into the sources of water in individual wells. Findings suggest
that nitrate is more likely to occur in shallow aquifers affected
by on-site wastewater system discharges, but that site-specific
conditions are very important indetermining the vulnerability of
wells tapping localized aquifers.
February 16, 2000, Brett Jokela, Montgomery
Watson, will present a talk entitled "Nitrate occurence in rural
residential wells in Anchorage, Alaska"
March 15, 2000, Rick McClure, Natural Resources
Conservation Service, will present his annual Spring Snow update
April 30 - May 4, 2000, AWRA Spring Specialty
Conference, "Water Resources in Extreme Environments"
May 17, 2000, Eric Knudsen, USGS, Biological
Resources Division, will present a talk entitled "Colonization
and development of stream communities across a 200 year gradient
in Glacier Bay National Park, Alaska, USA"
Alexander M. Milner - 1 & 2,
E. Eric Knudsen - 3, Chad Soiseth - 4,
Anne L. Robertson - 5, Don Schell - 6 , Ian T. Phillips - 1, and Katrina
Magnusson - 1
1. School of Geography and
Environmental Science, University of Birmingham, Edgbaston,
Birmingham B15 2TT, UK.
2. Institute of Arctic Biology,
University of Alaska, Fairbanks, Alaska 99775, USA.
3. U.S.Geological Survey, Alaska
Biological Science Center, Anchorage,Alaska 99503, USA.
4. National Park Service, Glacier
Bay National Park, P.O. Box 140, Gustavus, Alaska 99826, USA.
5. School of Life Sciences,
Roehampton Institute, West Hill, London SW153SN, UK.
6. Institute of Marine Science,
University of Alaska, Fairbanks, Alaska 99775, USA."
Abstract: During May of 1997 we studied both physical
and biological variables within 16 streams of different ages and
contrasting stages of development following glacial recession in
Glacier Bay National Park, southeast Alaska. The number of microcrustacea
and macroinvertebrate taxa, and juvenile fish abundance and diversity
were all significantly greater in older streams. Mircocrustacea
diversity was related to the amount of instream wood and percent
pool habitat while the number of macroinvertebrate taxa was related
to bed stability, instream wood and pool habitat. The percent contribution
of Ephemeroptera to the stream benthic communities increased significantly
with stream age which resulted in higher levels of coarse benthic
organic matter. Juvenile Dolly Varden were dominant in the younger
streams but juvenile coho salmon abundance was greater in older
streams due to increased pool habitat. Lakes were found to significantly
influence channel stability, percent Chironomidae, total macroinvertebrate
and meiofaunal abundance, and percent fish cover in downstream
reaches. Stable isotope analyses indicated N enrichment from marine
sources in juvenile fish and macroinvertebrates in older streams
with established salmon runs. The findings are summarized in a
conceptual model of stream development proposing that stream community
assemblages are determined by direct interactions with the terrestrial,
marine and lake ecosystems.