Why is it necessary to adopt the Atlas 14 rainfall frequency values?

The existing rainfall frequency values were developed in the 1960s and 1970s. Atlas 14 incorporated an additional 4 decades of rainfall data collected by the increased number of rain gages in Texas. In addition, Atlas 14 used improved statistical methods to conduct rainfall frequency analysis. These rainfall frequency values are used for infrastructure design and planning activities under federal, state and local regulations. The values are also used to evaluate flood risks, manage development in floodplains, and delineate floodplain boundaries for FEMA’s National Flood Insurance Program.

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1. What is Atlas 14?
2. Why is it necessary to adopt the Atlas 14 rainfall frequency values?
3. Who is affected by the implementation of Atlas 14?
4. What is coincidental ponding?
5. Are homes built to the new standards going to produce flooding in adjacent properties?
6. What is the City doing to mitigate the impact of increased rainfall frequencies?
7. How do I find out what areas of town will be affected?
8. Is my flood insurance rate going to increase?
9. Is my home at a higher risk of flooding?