ELGL’s Best of Water

Citizen Science for King Tide Flooding

Broward County, FL, USA
Broward County

Goverment Champion

Natural Resources Planning and Management Department


1 Thousand USD

Project Status

Operational since 2017

Challenges Addressed

Coastal & Tidal Flooding
Sea Level Rise
Citizen Engagement
Civic Technology


Smart city
Resilient city

Funding / Financing

General Fund/Existing Public Funds

Project Type


At a Glance

Low-lying coastal areas of Broward County can be impacted by flooding from high tide events. To help document locations and severity of flooding, Broward County launched a citizen science effort that encouraged citizens to submit geotagged pictures of flooding via their smartphones.

Problem Addressed

Low-lying coastal areas of Broward County can be impacted by flooding from high tide events. These often time occur during the fall (August-November) with the peak usually occurring the King Tide (Highest tide of year) in October. Improving data about the timing, locations and severity of flooding due to King Tides is a top priority in the County to addressing flood concerns.

Broward County used/is using citizen science to address this/these challenge(s).

Solution(s) Used

The County issued groups "King Tide Kits," refractometers, to community groups to help track and report tidal flooding at six flood-prone sites. Citizen participants were then encouraged to submit pictures of flooding using an application on their smartphones.


  1. Improved document of current flood risk in coastal areas
  2. Help citizens visualize the impacts of future sea level rise in their community
  3. Verify climate change models by comparing model predictions with the high-tide reality

Something Unique

Citizen science results can be viewed on an interactive storymap! Access here:

Who Should Consider?

Any community struggling with flooding issues, particularly those that are seeking to engage residents in flood mitigation & resilience efforts.