Hurricane Harvey brought on historic floods that devastated much of the city’s infrastructure. Visit the interactive map associated with this project that depicts flood depths and damaged buildings from Hurricane Harvey, population change over the last seventeen years, and future proposals for real estate development in 2045. Through combining several layers into a single interactive map, viewers are able to observe a spatial depiction of some of the main concerns of Houstonians: that developers are not only selling houses on flood-prone land, but that accelerated development is worsening already intense flooding in the city.
Damaged Buildings and FEMA Flood Zones. 68% of the damaged buildings in Hurricane Harvey were outside of the designated 1% annual flood zones. Read more about flood zones from the Shawnee County Flood Map Modernization project.
(A) Areas with a 1% annual chance of flooding
(AE) The base floodplain where base flood elevations are provided
(AO) River or stream flood hazard areas, and areas with a 1% or greater chance of shallow flooding each year, usually in the form of sheet flow, with an average depth ranging from 1 to 3 feet.
(VE) Coastal areas with a 1% or greater chance of flooding and an additional hazard associated with storm waves.
(X) Area of minimal flood hazard, usually depicted on FIRMs as above the 500‐year flood level.
Harris County Land Cover (2001-2011). Land cover change and the loss of wetlands is determined to be one of the main reasons that Harvey’s effects were so severe. In 2001 54% of Harris County land was considered Developed. In 2011 61% of Harris County land was considered Developed.
For more information, or to access to some of the data used in this project you can visit the following links: FEMA flood zone layer, the USGS National Land Cover Database, and the FEMA Damage Assessment damaged buildings layer.