JONESBORO ARKANSAS JUNE 19 2019 MANAGING FLOOD RISK

JONESBORO, ARKANSAS JUNE 19, 2019 MANAGING FLOOD RISK Protecting People and Property in the Floodplain Whit Montague, CFM State NFIP Coordinator and State Climatologist

Flood Risk

Flood Risk • Difficult to delineate floodplain • Does not incorporate significant changes since 1991 • Does not communicate risk in a meaningful way

Better Communication: Flood Risk

Base Level Engineering

Better Communication

What is Base Level Engineering? • Non-regulatory engineering analysis to provide predicted areas of flood risk for possible future FIRMs • Engineering baseline that allows FEMA to assess its current flood maps • Flood risk data that provides a platform for broader risk communications

What is Base Level Engineering? • Engineering modeling that may be used and leveraged by local communities to review the effect of development in and around the floodplain. • Does NOT replace your current FIRMs

Why Base Level Engineering?

Better Data Better Assessment

What do you get? • • • Engineering Models (1 D or 2 D) 10 -yr, 25 -yr, 50 -yr, 100 -yr, 500 -yr Estimated Flood Map Estimated Depth Grid Estimated WSE Grid

Informed Decision Making

LOWER ST FRANCIS

• In Arkansas… It’s Perfect…Right? • Data developed using semi-automated procedures • Hydrology is simplified but still detailed • Can always be refined • Hydraulics has some structure data in it • Road Embankments • No actual structure data (e. g. , no culverts, bridges, etc)

§ buildings or other structures § mining § dredging § filling § grading § § paving excavation drilling operations storage of equipment or materials Development in the SFHA 59. 1. Definition: • ANY man-made change to improved or unimproved real estate

59. 1. Definition: • ANY man-made change to improved or unimproved real estate Development in the SFHA

Development in the SFHA • 59. 1. Definition: • ANY man-made change to improved or unimproved real estate

59. 1. Definition: • ANY man-made change to improved or unimproved real estate Development in the SFHA

Higher Standards • What can be done locally to mitigate future losses? • How do higher standards help with mitigation?

• What can be done locally to mitigate future losses? • How do higher standards help with mitigation? Higher Standards

Causes and Future Forecast • Why was the flooding so extensive? • What does this mean for the future? • What are we expecting this year?

• Why was the flooding so extensive? • What does this mean for the future? • What are we expecting this year? Causes and Future Forecast

7. 2 7 Questions?

• Whit Montague, CFM • State NFIP Coordinator and State Climatologist • 501 -682 -3969 • whitney. montague@Arkansas. gov • www. floodplain. ar. gov ANRC Resources

• Whit Montague, CFM • State NFIP Coordinator and State Climatologist • 501 -682 -3969 • whitney. montague@Arkansas. gov • www. floodplain. ar. gov Social Media