Brazoria County Texas – Flooding vs. Elevation [Infographic]

When Flood Mitigation Becomes Necessity

According to the Brazoria County Emergency Management Department, approximately two-thirds of the County’s population was affected by the 2016 flooding in some manner.

P3 Home Elevation - Erosion

Increased Frequency

Recent years have yielded more flooding, with increased volume and frequency; with several major rainfall events since 2015. Homes that have repeatedly flooded, may find that home elevation is a more practical and less costly option in the long run.

River Erosion

Riverbanks have continued to migrate over/outward; shifting enough each year to cause flooding in areas that didn’t before. Residents who didn’t have to worry about flooding may have to consider what the next decade or two will bring.

Recent Major Flooding Events

Brazoria County 2015 Floods

MEMORIAL DAY FLOOD

In 2015, a Supercell over San Leon
spawned a storm that extended
from central Brazoria county to
Dickinson and then into western
Galveston Bay. Parts of
Brazoria County received up to 8
inches of rain and parts of
Galveston and Harris counties
received between 10-14 inches of
rain. Just weeks later, a Memorial
Day storm inundated southeast
Texas causing massive flooding.
The Brazos rose to a level of 52
feet, coming out of its banks in
Rosharon, Texas, spilling
into Oyster Creek and the
surrounding bayous.

 

Brazoria County 2016 Floods

JUNE BRAZOS RIVER FLOOD

The historic Tax Day Floods
saturated areas of Southeast
Texas with 12 to 16 inches of
rain in 12 hours. Beginning
June 4th, the Brazos River
started flooding over its banks.
At the time, this was a historic
event with the river cresting at
its second-highest level ever,
only exceeded by the flood of
1913. According to the County
Emergency Management
department, approximately
two-thirds of the
county’s population was
affected by the flooding in
some manner.

 

Brazoria County Hurricane Harvey Floodplain

HURRICANE HARVEY

The Brazos and San Bernard
Rivers experienced record
water levels, which caused
widespread floods across the
county. The hardest-hit
communities were in Baileys
Prairie, Richard, and West
Columbia. Widespread major
flooding on the Brazos River
and Oyster Creek led to
numerous roads and homes
flooding in Columbia Lakes,
Mallard Lakes, Great Lakes,
Riverside Estates, and the Bar
X Ranch subdivisions.

 

 

 

Angleton, Texas On The Brazos River

The Brazos River is expected to shift its banks continually each year; moving closer and further into neighborhoods already experiencing flooding and erosion. Shifting river banks can signal that in any number of years, there are areas that may begin to see a first-time flood. Those who have had lower levels of flooding may begin to see the depth of flooding increased over time.

Brazoria County Hurricane Harvey Flooding Before and After
P3 Home Elevation - 004
P3 Home Elevation - 005

Solutions From The Home Elevation Professionals

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P3 Home Elevation - solutions
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Sources:
1. https://www.weather.gov/media/hgx/climate/summary/2010Top10.pdf
2. https://www.brazoriacountytx.gov
3. https://www.khou.com/article/weather/hurricane/harvey/nhc-harvey-caused-125-billion-in-damage-68-deaths-in-texas/285-511430188
deaths-in-texas/285-511430188
4. https://www.brazoriacountytx.gov (Brazoria County 2016 Floods Disaster Recovery Needs Assessment)
5. https://www.fortbendcountytx.gov/home/showpublisheddocument?id=52436
6. https://www.floodsmart.gov/index.php/flood-insurance-cost/calculator
7. https://agents.floodsmart.gov
8. https://www.floodsmart.gov/flood-map-zone/elevation-certificate
Before and after images provided by DigitalGlobe

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