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NOAK48 PACR 181634
PNSACR
AKZALL-191600-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE ANCHORAGE AK
ALASKA-PACIFIC RIVER FORECAST CENTER
800 AM AKDT FRI APR 18 2014

... THIS IS FLOOD AWARENESS WEEK IN ALASKA...

THIS WEEK MARKS THE BEGINNING OF THE FLOOD SEASON FOR ALASKA.  

EACH DAY OF FLOOD AWARENESS WEEK WILL FEATURE A UNIQUE TOPIC RELEVANT
TO EDUCATION AND PREPAREDNESS.

TODAY WE HIGHLIGHT GROUNDWATER FLOODING...

FLOODING IS GENERALLY THOUGHT TO BE CAUSED BY WATER THAT OVERFLOWS
STREAMS, RIVERS, AND LAKES. FLOODING CAN ALSO OCCUR WHERE THERE IS NO
VISIBLE CONNECTION TO ONE OF THESE WATER SOURCES. GROUNDWATER
FLOODING IS LESS COMMON, BUT IT CAN CAUSE PROPERTY DAMAGE AND IMPACT
PEOPLE THAT LIVE ADJACENT TO RIVERS OR IN LOW LYING AREAS IN CLOSE
PROXIMITY TO ANY WATER BODY.

GROUNDWATER FLOODING OCCURS WHEN EXCESSIVE RAINFALL OR OTHER
MECHANISM RESULTS IN ELEVATED LEVELS OF THE GROUNDWATER TABLE.
STRUCTURES WITH BASEMENTS OR CRAWL SPACES THAT ARE SITUATED IN
LOCATIONS THAT HAVE A RELATIVELY SHALLOW GROUNDWATER TABLE ARE MORE
PRONE TO THIS TYPE OF FLOODING. DURING THE 2008 FLOODING ALONG THE
TANANA RIVER, SOME AREAS RECEIVED SUBSTANTIAL FLOODING DUE TO RISING
GROUNDWATER. IN THE TOWN OF NENANA, THE HIGH LEVEL OF THE TANANA
RIVER CAUSED GROUNDWATER TO RISE TO THE SURFACE AND FLOOD STREETS,
BUSINESSES AND HOMES. RESIDENTS NEAR SOLDOTNA HAVE EXPERIENCED THE
SAME CHALLENGES IN 2013 FROM HIGH SNOWFALL WINTERS FOLLOWED BY WET
SUMMERS AND FALLS.

RESIDENTS IN LOW LYING AREAS THAT ARE PRONE TO GROUNDWATER FLOODING
SHOULD PREPARE BY MOVING VALUABLES IN BASEMENTS AND CRAWL SPACES TO
HIGHER LEVELS. ENSURE THAT SUMP PUMPS ARE INSTALLED AND WORKING. ALSO
MAKE SURE THAN DRAINAGE DITCHES ARE CLEAR AND THAT SNOW BERMS ARE NOT
CONTAINING OR SENDING SNOWMELT WATER TOWARDS LOW LYING STRUCTURES.

THIS IS THE LAST IN A SERIES OF FLOOD AWARENESS MESSAGES HIGHLIGHTING
THE START OF THE ALASKA FLOOD SEASON.

$$ 



Alaska Region Headquarters
222 West 7th Avenue #23
Anchorage, AK 99513-7575
Voice: 1-907-271-5088
Fax: 1-907-271-3711
Recorded Forecast: 1-800-472-0391
Webmaster Email: ARH Webauthors
Page Modified: 03 Feb 2008 18:00 UTC
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