Imagine EGE
| MAP LEGEND
0.2% Annual Chance
Flood Hazard
| | NH Rivers
NH Water bodies
| | Nashua Wetlands
Conservation Areas
City Parks
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Open Space Map I
Social Pinpoint Mapping
In Social Pinpoint users had
the option to provide feedback
on areas they felt should be
maintained and protected.
The following areas were
highlighted as locations that
residents and visitors would
like to be preserved or further
maintained, and delineated as
conservation land: Pennichuck
Brook and Pond and the
surrounding areas, Holman
Stadium, Arlington Community
Center, Salmon Brook, Mine
Falls, Roby Park, Yudicky Park.
Amherst
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Key conservation land, wetlands, and future flood conce
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While the future is uncertain, it is clear that Nashua will face increased
risk from a wide range of weather and climate scenarios in the coming
decades.
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While Nashua will not be
impacted by sea level rise
and storm surge, the City is at
risk of riverine flooding from
increased precipitation and rising
temperatures leading to increased
snow melt and stormwater
inundation.
What is a ‘0.2%-probability
flood’?
A‘0.2%-Probability flood,’
commonly called a ‘500-year
flood,’ is a flood that has a0.2%
chance of taking place in any given
year. Experts prefer not to use the
“500-year” term since it gives the
impression that a certain level
of flooding will only occur once
every 500 years. In fact, it has a
0.2 percent chance of occurring in
any given year and can even occur
multiple times in a single year or
decade. Over a fifty-year period,
there is almost a one in ten chance
that a 0.2 percent annual chance
flood will occur at least once.
While properties within the
100-year flood plain are generally
required to purchase flood
insurance, properties outside this
zone can still be subject to the
effects of rain and overflow.
