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1) c
Flooding in New York
• Flooding in New York State.• Floods happen, but sometimes they are large and
very expensive to repair.• New York has many rivers, but all flood from time to
time.
Maps
What is…2011 Hurricane Irene
1972 Hurricane Agnes
A number of smaller localized events
Common in spring from winter melt and spring rains.
These floods help to keep water in ground for the summer
months.
Most floods occur in low lying areas, but the larger floods can
occur near waterways and in flood plains
Flood plains
• A flood plain is an area adjacent to a river or waterway that is susceptible to higher water.
• Normal flooding can fill a valley but a larger flood will combine valleys and both flood.
When…
Current speculations states that the current 100 and 500 year
floods will occur every 5-20 years.
Most floods occur in the spring months, but large storms can
create them anytime.
Hurricane Irene September 2011
Hurricane Agnes June 1972
What causes this event?
Ice jams
Melting ice blocks the rivers and water backs
up
Hurricanes
These storms drop many inches or feet of
rain.
Snow melt
We tend to get a lot of snow and if it melts
quickly it can flood.
Who is affected?
Hurricane Irene• Eastern New York , Catskills
and Hudson valley.• Damaged roads, bridges
and homes.
Hurricane Agnes• Binghamton and Elmira
hardest hit.• Damaged roads building.
Hurricane Irene • Hurricane Agnes
Possible WarningLevee system developed form southern New York state
Along Susquehanna, Mohawk and numerous Catskill rivers.
Cannot prevent a storm, but ice jams have been attacked with
explosives and machinery.
Is there any way to predict?
Many times flooding is predicted ahead of time so preparations can
be made.
Evacuation planThere are evacuation plans setup but people need to use them.
FactsHurricane Agnes
13.7 inches of rain
200-300 homes destroyed
$200 million in damages
Hurricane Irene
10 deaths
$296 million in damage
Landslides (too numerous to count) in the high
peaks
• DEC authorized immediate action to relieve flood waters and fix damage, ordered by Governor.
• Towns and villages then took plows and bulldozers to the creeks to shape them and make them wider to let out the water.– This damaged the rivers in an area that most of its
tourism come for. (Catskills and Adirondacks)• Bad for animals who live in stream.• Increased stream erosion.• Took out meanders from the streams
which increases discharge.• DEC is charged to protect environment
from all others, not just when times are good. (money to remediate all the streams has been astronomical so far.)
What If...
Both hurricane names were retired from
ever being used to name hurricanes again!
It will likely occur again and the state
governments can learn from their mistakes.
“I’ve lived in this house for 40 years,” he said. “I wait until the storm is gone, and then I clean up the mess. I don’t do much in the way of preparation except make sure the doors are closed.”
Works Cited http://www.nature.com/nclimate/journal/v2/n6/f
ull/nclimate1487.html
http://minerva.union.edu/garverj/mohawk/history.html
http://en.wikipedia.org/wiki/100-year_flood http://en.wikipedia.org/wiki/Hurricane_Agnes http://en.wikipedia.org/wiki/Effects_of_Hurricane_
Irene_in_New_York