A Glance into Flood Mapping Technology and Methodology

Have you ever wondered of how exactly does flood mapping work? Or will your property flood? Our clients ask us that a lot, so we thought that shedding some light on this complex subject wouldn't be a bad idea.

#1 - Anywhere it rains it can flood
A flood is a general and temporary condition where two or more acres of normally dry land or two or more properties are inundated by water or mud-flow. Many conditions can result in a flood: over-topped levees, or clogged drainage systems and rapid accumulation of rainfall. In high-risk areas, there is at least a 1 in 3 change of flooding during a 20-years. Changing weather patterns, erosion and development can affect floodplain boundaries.

#2 - Determining flood risk
To identify a properties flood risk, we conduct a flood study. The study includes statistical data from river flow, storm tides, hydrologic/hydraulic analysis and rainfall by doing a flood risk analysis on a building. You must know the base flood elevation and the building finished floor elevations in order to know if your building is at high risk of flooding in a 100 year flood.

 #3 - Understanding flood mapping technology
Our flood maps are based on Lidar technology, which stands for Light Detection Ranging. Lidar is a system for gathering digital terrain data using airborne laser systems flown aboard an aircraft equipped with GPS. This technology is used though the world for creating flood maps. It allows us to produce an extremely accurate topographical model of the subject property.

Relying on the accuracy of the above site model we create flood prediction models. This is done by integrating accurate scientific data from NOAA, USGS, USACE, NASA and other sources to create a comprehensive assessment of current and future flood risk at the property level. To understand fully that this is a site specific assessment that is extremely accurate and not a generalized representation of a large area.We have revolutionized flood prediction modeling by automating the relation of elevation data compiled using LIDAR with storm and tidal flood projections including sea level rise.

#4 - Knowing your options
We help you understand the various approaches to flood risk reductions and create recommendations for your specific flood situations like Sewer back up, Storm Surge, Riverine Flooding, Flash Flooding, Coastal Flooding. We have the resources and experience to provide you with the answers to a multitude of different flood related questions that you may have.

Have we missed something? Let us know.