Shirley wrote:phxgators wrote:There a fire burning up between Sedona and Flagstaff right now that is in pretty rugged terrain. They aren't even really trying to fight it other than by setting up fire lines at the nearest roads they can use to try to contain it. They have been able to protect the homes originally threatened, but they still expect it to get to about 20,000 acres before it's contained. Sadly, that's not that big for some of the fires we've had here over the last several years. There was one that burned over a half million acres 2 or 3 years ago.
We didn't have a very wet winter and monsoon season will be here soon, it wouldn't surprise me if we have another bad fire season here.
So I know wildfires are a natural part of the ecosystem out there, but do you know if they are naturally of this size and/or frequency? Or has human deforestation and yard-watering affected the amount of dry tinder out there? Also, I guess we're probably starting a lot of these fires too, right?
My guess would be at least half of the fires each season are human caused. Either someone leaving a campfire behind that wasn't put out all the way, someone tossing a cigarette out their car window, even a hot tailpipe parked up against some dry grass.... In the 13 years I've been out here, it's not at all uncommon for there to be at least a couple of fires of 10,000+ acres each season. Every once in a while we'll have one that gets to 100,000+.
There are a few issues affecting the forests in the northern part of the state. Obviously, it's dry here, but some winters are particularly dry - meaning there is a lot of dried up/dead vegetation ready to fuel a fire. Some forests have also had infestations of bark beetles, killing trees in their wake, so there is no shortage of fuel there. And, something that article on Yarnell touched on, in trying to manage forest fires, they may not happen as often but with the extra years worth of growth, there is more to burn when there is a fire.
Luckily, this isn't an issue in places like the Phoenix metro area, though smaller brush fires do still happen. There's just not enough for much of any sustained fire.