Coastal Resilience

Stormwater-Runoff

July 2017/Barnstable Village: 7″ of rain in one hour.

Coastal Resilience is the ability of a community to bounce back after major storms.  It is anticipated that “100 year storms” will become “10 year storms” by 2050!   That means the chance off occurrence increases from a 1% chance to a 10% chance.

Stormwater Runoff

In 2017 we had two storms that brought 4″ and 7″ of rain in less than one hour. In both instances flooding occurred in the Barnstable Village, on various areas on Route 6A and in the Barnstable Marina parking lot.  Local residents have begun lining their properties with sand bags to deflect rainwater off the street from flooding their property.

Rain water runoff from the County Complex parking lot is designed to drain into lagoons behind the Barnstable Tavern.  These largely stagnant lagoons are overwhelmed in major rain events.  When overwhelmed, these lagoons drain into Barnstable Harbor’s Rendezvous Creek.  Pollution and stormwater runoff systems designed and implemented as recently as 20 years ago are not built to meet the magnitude or the frequency of today’s storms.

More frequent and longer duration storm events are predicted.  Of course, there’s always the possibility of a major hurricane releasing its fury.

Flooded Road Way Barnstable

July 2017/ Barnstable Marina

King Tides

King tides coupled with storm surges have flooded our village already two different times in 2018 (this is written 3/8/18).  These events have flooded homes and businesses with seawater levels never before witnessed.  Residents of the Blish Point neighborhood had their homes flooded by seawater from Maraspin Creek Marsh and from Millway Beach.  Spots along Route 6A were flooded and impassable during both of these storms.   Coastal structures, piers, bulkheads, and sea walls have suffered significant damage this past winter.  Aquaculture gear was strewn all over the harbor following the January 4th storm.  It remains to be seen what the impact of these storms will be on the harbor’s channels and sandbars.

Following the January 4th storm, attendees at a Cape Cod Bay stakeholders meeting addressing Coastal Resiliency, commented on the accuracy of the FEMA flood maps.

Waves Crashing on Rendezvous Lane during January 2018 Super tide

January 2018/ Rendezvous Lane Storm Surge King Tide Roadway Flooding

Coastal Resilience

The future of Barnstable Harbor and Barnstable Village is at stake.

Rain gardens and permeable pavement are fantastic short term steps for mitigating the harmful impacts of stormwater runoff to the harbor and its marshes.  Nevertheless, long term solutions must be developed and employed to ensure the long term well being of Barnstable Harbor.

Town planners and citizens must work together to design and implement updated zoning laws that consider a future where rising tides change our coastal landscape and impact our businesses, homes, and infrastructure.  Businesses and homeowners themselves must plan for the inevitable future.

Land bank acquisition and preservation of coastal land will allow Barnstable Harbor’s salt marshes to grow and migrate.  This evolution of the salt marshes will be integral to preserving a healthy harbor.

This past year’s storms have made it abundantly clear that rising tides and flooding storms are real.