Analysis of Observed Rainfall and Flooding near the Schultz Fire Scar from 2010-2014: Trends and Implications for Hydrologic Warnings and Decision Support
The hydrologic response of the Schultz fire scar has evolved considerably with time. Given the rapidly changing impact potential, providing useful decision support to people affected by flooding from the Schultz fire scar has been a challenge for forecasters. The first heavy rain events over the Schultz scar in 2010 produced destructive flooding, with numerous homes and roads damaged by debris flows. Progressively less damage occurred in 2011 and 2012. In 2012, flood mitigation efforts (levees and channels for carrying water through downstream neighborhoods) commenced. In 2013, one of the wettest convective seasons on record impacted northern Arizona. More than 50 cm of rain fell over portions of the Schultz fire scar. Very heavy rainfall events occurred both over and around the Schultz scar in 2013, providing a good base to compare burn and non-burn responses, and those parts of the impact area which saw some flood mitigation. Notable events from the in-progress 2014 convective season will also be included.
The evolution of the flood response on the Schultz fire scar will be detailed in this presentation. In direct relation to the meeting theme, evolution of decision support services will also be addressed, including the challenges in providing forecast support for an area undergoing rapid changes in impacts.