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Floods are powerful,
but knowledge is too.

LET'S MAP A PATH FORWARD

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MAAPnext, the Modeling, Assessment and Awareness Project, represents a transformative approach in the management and regulation of Harris County’s floodplains, further contributing to our county’s resilience.

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Sep 09, 2019
HARRIS COUNTY FLOOD CONTROL DISTRICT
The Harris County Flood Control District is moving forward with MAAPnext, the Modeling, Assessment and Awareness Project. This project, like the Tropical Storm Allison Recovery Project (TSARP) in 2001, represents a transformative approach in the management and regulation of our floodplains in Harris County, further contributing to our collective resilience.

We are
RESILIENT

In Harris County, flooding is our natural disaster. On average, we experience a major flood somewhere every two years - and each time our communities come together to rebuild. But being resilient is about more than rebuilding - it’s about planning ahead and creating the tools we need to make smarter, more informed decisions before, during, and after disaster strikes.

OUR CHALLENGES

RAINY CLIMATE

Harris County is prone to extreme rainfall events. We receive more annual rainfall than most other parts of Texas.

HIGH URBANIZATION

Harris County has more people than any other county in Texas. This means more buildings and roadways and fewer safe places for water to go.

GULF COASTAL PLAIN

Our region is low-lying with flat landscape, and predominately clay soils that do not absorb water very well.

HOW WE OVERCOME THEM

MANAGE THE FLOOD RISK

The Harris County Flood Control District works with entities that outfall to our systems to ensure that there will be no impact to receiving waters.

DEVISE AND IMPLEMENT FLOOD DAMAGE REDUCTION PROJECTS

Harris County’s flood control infrastructure is extensive, including more than 1,500 channels, including creeks and bayous, totaling about 2,500 miles in length.

MAINTAIN THE MOST DATA-RICH FLOOD MAPPING SYSTEM IN THE NATION

The Flood Control District is continuously improving its flood data and modeling methods in order to prevent the increase of flood risk.

Knowledge is
POWER

Smart communities are resilient communities. With MAAPnext, the Harris County Flood Control District and FEMA are transforming how we understand and manage Harris County’s floodplains. Using the most current data and techniques, MAAPnext will give us the tools we need to protect life and property against flooding.

HOW DO WE MAP FLOOD RISK?

UPDATED DATA

  • County-wide impervious data developed from 2018 aerial imagery
  • Completed flood risk reduction projects incorporated
  • NOAA’s recently-released Atlas 14
  • Updated terrain data
Learn more

IMPROVED MODELING METHODS

  • New powerful modeling software will allow for 2-Dimensional Hydraulic Modeling
  • New hydrology method that better accounts for a watershed's conveyance capacity
  • Rain-on-Grid analysis will allow for the previously unmapped urban flood risk to be identified.
Learn more

MAPPED RESULTS

  • Modeling results are analyzed and mapped in GIS
  • Additional flood risk data sets are developed that describe the results in a variety of useful ways
  • Better data and methods means many changes are expected to current floodplain maps
Learn more

WHAT IS A HYDROLOGIC AND HYDRAULIC MODEL?

Engineers are able to utilize an integrated system of software to simulate real world conditions in our region’s bayous, streams, and channels. These simulations are completed using hydrologic and hydraulic, or H&H, models. These models predict how precipitation will impact the landscape with estimates of how deep the water will get at different locations under different weather conditions and how frequently this water depth is likely to occur.

Mapping our
GOALS

The overarching goal for MAAPnext is to provide you with the flood risk information you need to make important life decisions in Harris County.

Empower Harris County residents

  • Develop a comprehensive flood risk education and awareness campaign for Harris County residents
  • Provide the flood risk information that residents need to make important decisions
  • Further the resilience of our region in the face of extreme storm events

Lead the nation in innovation and reliability

  • Deliver an innovative and reliable approach to floodplain mapping and flood risk analysis
  • Leverage advancements in modeling technology and methods to elevate our understanding on all flood risks
  • Transform how floodplains are managed in Harris County and evaluate flood risks in greater detail than was previously possible

Ensure that Harris County has the best tools possible

  • Produce the County’s most comprehensive set of flood hazard maps and information to date
  • Inform future growth, development, and mitigation strategies
  • Identify and map flooding in streets and neighborhoods on a county-wide level