re: New online maps to show how deep the water may have gotten in your neighborhood in 2016

This data isn't actual 2016 flood depth. It's based on the flood model developed by the LA Watershed Initiative. They used USGS 2016 high water marks to calibrate the model, so it's pretty good, but not 100%. Once they calibrated the model using the 2016 flood, they ran multiple what-if scenarios to help municipalities better plan in the future. The goal is to input proposed new developments into the model and determine the impact on flooding before the development is approved for construction.