[vc_row full_width=”stretch_row_content_no_spaces”][vc_column][vc_column_text]photo of flooding[/vc_column_text][vc_raw_html]JTNDZGl2JTIwY2xhc3MlM0QlMjJjYXJvdXNlbC1jYXB0aW9uJTIwZC1tZC1ibG9jayUyMGQtc20tYmxvY2slMjIlM0UlMEElM0NoMSUzRVVuZGVybHlpbmclMjBTY2llbmNlJTNDJTJGaDElM0UlMEElM0MlMkZkaXYlM0U=[/vc_raw_html][/vc_column][/vc_row][vc_row][vc_column][breadcrumb-shortcode][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

Intensifying Rainfall and Flooding in New Jersey

  • Higher temperatures increase the energy in storms and allow the atmosphere to hold more water, which increases the potential for more intense precipitation and flooding
    • By the end of the 21st century, heavy storm events are projected to occur 200 to 500% more often and with more intensity than in the 20th century
    • Major flood events hit New Jersey in 2000, 2004, 2005, 2006, 2007, 2010, 2011, 2012, 2016, and 2021
  • NJDEP and the Northeast Regional Climate Center, a National Oceanic and Atmospheric Administration (NOAA) partner, released two New Jersey-specific studies in November 2021:
    • Confirming increases in precipitation across New Jersey over the last 20 years
    • Projecting further increases in precipitation intensity over the coming decades
  • The data presently used to analyze flood potential in waterways and in the design of stormwater infrastructure is outdated—it includes data only through 1999
    • The precipitation expectations that presently guide state policy, planning and development criteria, and which rely upon data obtained through 1999, do not accurately reflect current precipitation intensity conditions

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Highest Observed and Projected Precipitation Change

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Observed Precipitation Change Since 1999

Projected Precipitation Change Under a Moderate Emissions Scenario for 2050-2099

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More Intense Rain =
More Stormwater Runoff

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More Runoff =
Increased Riverine Flow

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More Flow =
Higher Flood Elevations

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