[NOTE: MORE industry propaganda and BS. Where’s the honest full-costed accounting and economic analysis? What is the full-replacement cost of a goods sold, the full cost of production a a tree many hundreds of years or even thousands of years old, let alone the soil, air and water lost to logging? Look at Bing Maps, or Google Earth for a forest area you know and then do a “fly over”. See for yourself. Everyone knows forests and trees provide shade. That shady areas are cooler than clearcuts. That cooler areas attract moisture just like a glass of iced tea attracts moisture condensation on the outside of the glass. The conclusions of this industry-biased article are bogus. Forests attract water and then store it up both in the trees themselves and in the ground for release during the hotter drier months. Logging forests leaves them, hotter, drier and more flammable not the opposite as this proven to be dishonest industry claims. In well over 100 years of history they are well known to be unable or unwilling to tell the truth about much if anything. Shut all those that are dishonest and destructive down and save what’s left of our forests and begin recovering what’s been lost if you care about the survival of the human species along with the rest of life on Earth as we know it. Anyone not understand the role of the “lungs of the planet?” With 70 % gone globally and 90-95% nationally we are going to let them cut any more, for any reason. To do so is an act of war, and in self defense, if for no other reason they must be stopped. TGH]
Our too-thirsty forests
By HELEN M. POULOS AND JAMES G. WORKMAN
Los Angeles Times
Scientists and water managers report that 39 states face water scarcity. Much of the nation’s freshwater shortfall comes from our population growth, waste, hunger and contaminants. But we must also now implicate the escalating thirst of unnatural forests.
Water depletion from afforestation – the establishment of trees or tree stands where none previously were – is the unintended consequence of a wildly popular federal policy. For millenniums, fires set by lightning or Native Americans limited forest stocks to roughly a few dozen trees per acre. All that changed after the nationally terrifying Big Blowup wildfires of 1910, which led the United States to in effect declare war on wildfire. The government’s wartime-like tactics included security watchtowers, propaganda, aerial bombing and color-coded threat alerts. Uncle Sam trained elite Hotshot and Smokejumper crews to snuff out enemy flames. Congress annually funded the war effort with an emergency blank check, now $2.5 billion.
Decades of heroic victories against fire led to gradual defeat in the larger war. Fuel builds up, and when it ignites, the fires burn hotter, faster and more destructively. More new trees compete for less sunlight, thinner soil nutrients and scarcer water resources. Native wildlife suffers. Insects and diseases spread faster. Public subsidies protect private properties at the wildland-urban interface.
Ironically, Congress enacted the anti-fire 1911 Weeks Act and 1924 Clarke-McNary Act to prevent erosion and thus secure downstream navigable rivers. That logic made sense in damp Eastern states, but it had the opposite effect in the semiarid West. There, fire exclusion degraded the integrity and runoff of high-elevation watershed recharge zones.
Naturally, forest managers focus on forest health. Yet combing through their extensive upland research, our analysis also found the larger scope of downstream casualties: suppression of fire causes suppression of flows.
Indeed, in some landscapes, you literally can’t see the river for the trees.
Call it the water-fire nexus. To be sure, the dynamics are complex. Impacts fluctuate locally depending on forest slope, aspect, age, altitude, density, latitude, species composition and natural history. But adjusting for these variables reveals the nexus’ overarching pattern.
First, the past century of fire suppression has resulted in roughly 112 to 172 more trees per acre in high-elevation forests of the West. That’s a fivefold increase from the pre-settlement era.
Second, denser growth means that the thicker canopy of needles will intercept more rain and snow, returning to the sky as vapor 20 percent to 30 percent of the moisture that had formerly soaked into the forest floor and fed tributaries as liquid. But let’s conservatively ignore potential vapor losses. Instead, assume that the lowest average daily sap flow rate is 70 liters per tree for an open forest acre of 112 new young trees. Even then, this over-forested acre transpires an additional 2.3 acre-feet of water per year, enough to meet the needs of four families.
Third, that pattern adds up. Applying low-end estimates to the more than 7.5 million acres of Sierra Nevada conifer forests suggests the water-fire nexus causes excess daily net water loss of 58 billion liters. So each year, post-fire afforestation means 17 million acre-feet of water can no longer seep in or trickle down from the Sierra to thirsty families, firms, farms or endangered fisheries.
So how do we unlock the nexus to replenish the Earth? A century’s accumulation of dry fuel in public lands makes it too expensive and risky – for people, property, habitats or carbon emissions – to unleash prescribed fires throughout our 16-million-acre ponderosa tinderbox. Mechanical thinning generates popular distrust as long as timber industry chain saws try to cut “high grade” valuable mature growth to compensate for less profitable small-diameter “trash trees.”
Happily, a lumber mill’s trash has now become a water user’s treasure. Thirsty downstream interests could organize to restrict thinning to scrawny excess trees simply for the purpose of releasing the liquid assets they consume. Western water rights markets value an acre-foot at $450 to $650 and rising. So rather than compete with forests for rain and snow, private and public institutions could invest $1,000 per acre (average U.S. Forest Service price) to cut down fire-prone trash trees, yielding at least $1,100 to $1,500 worth of vital water. To reduce fuel loads and increase runoff, the water-fire nexus pays for itself.
This pragmatic approach has regional precedents. The U.S. Endowment for Forestry and Communities cites forest-to-faucet agreements emerging from Denver to Raleigh, N.C. The only obstacle is our century-old cultural mind-set that if a dozen trees are good, 100 trees are better. But as temperatures rise, too much forest strangles too many watersheds. To replenish streams before they dry up, we lifelong tree-huggers must learn when and where to let go.
ABOUT THE WRITERS
Helen M. Poulos is a fire ecologist and postdoctoral teaching fellow at Wesleyan University’s College of the Environment. James G. Workman, a former wildland forest firefighter, is a visiting professor at Wesleyan and the author of “Heart of Dryness.” They wrote this for the Los Angeles Times.