Hydrology and Communities: Understanding Flood Events in Boulder 2013

Explore the intersection of hydrology and community data in the context of the 2013 Boulder floods. Discover the various data sources, visualizations, and strategies used to map and assess flood risk in the St. Vrain Watershed. Learn about FEMA's NFHL mapping and the importance of tracking events to enhance flood preparedness.

• Hydrology
• Communities
• Flood Mapping
• Boulder 2013
• Data Sources

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1. Flood Mapping: Hydrology and Communities 2013 Boulder Floods Presented by: Sandra Sweat Fall 2015 Professor: Dr. David Maidment

2. Objectives Understand the relationship of hydrology and community data sources. Look at how people interact with flood events. Visualizations: What types of visualizations can be made to represent a flooded area both in GIS and in other representations?

3. Data Hydrology Community USGS ArcMap connected data FEMA NOAA CMS Census 2010 National Weather Service ESRI Twitter Newspapers Journal and Government Papers Zip Codes

4. St. Vrain Watershed

5. St. Vrain Watershed

6. Catchments and Gages Land Cover

7. Hello, FEMA. NFHL Resulting maps There are 12 data layers in the National Flood Hazard Layer. S_FLD_HAZ_AR A 1% annual chance AE 1% annual chance AO - floodway X 0.2% annual chance

9. Census Target groups based on loss of life Age 15-24 Age 75+ Buildings Hospitals Dialysis Centers Nursing Homes

10. Legend Age 75-85 Age 85 +

11. Legend Age 75-85 Age 85 +

12. Legend Age 15-19 Age 20-24

13. Event Tracking Creating a Timeline 1. Streamflow 2. Rainfall 3. Daily Camera Article 4. NWS Storm warnings 5. Twitter manual searching

14. Flow versus Rainfall September 9th-18th Boulder Creek at Orodell Rainfall in inches Fourmile Creek at Orodell Flow in cfs Boulder Creek Near 75th Hourly Rainfall Boulder Rainfall Accumulation Boulder Time (YYYYMMDD hh:mm)

15. Twitter 1. Twitter manual searching Keyword search: flood, boulder, emergency, storm, precip, rain Date Range: 9/11 9/18 Agency Searches: NOAA, NWS, Boulder Police

16. Flow versus Rainfall Daily Camera Storm Warnings Twitter Rainfall in inches Hourly Rainfall Boulder Flow in cfs Rainfall Accumulation Boulder Boulder Creek at Orodell Fourmile Creek at Orodell Boulder Creek Near 75th Time (YYYYMMDD hh:mm)

17. Questions