Clear-cutting linked to 18-fold rise in extreme floods, UBC study finds
Peer-Reviewed Publication
Updates every hour. Last Updated: 5-Nov-2025 09:11 ET (5-Nov-2025 14:11 GMT/UTC)
Clear-cutting can make catastrophic floods 18 times more frequent with effects lasting more than 40 years, according to a new UBC study. In one watershed, these extreme floods also became more than twice as large, turning a once-in-70-years event into something that now happens every nine. This research challenges conventional thinking about forest management’s impact on flooding.
Despite their critical role in turf maintenance and because they aren’t pest management tools, wetting agents do not go through the same federal registration and labeling process as herbicides, fungicides, or insecticides, resulting in less research data about what they are and how they work. In the absence of such data, marketing terminology such as “penetrant” or “retainer,” along with anecdotal evidence, have been used instead. After several years of research, the results are in on the difference in turfgrass soil surfactants that are marketed as “penetrants” and “retainers.” The study titled “Penetrants Versus Retainers: Comparing Soil Surfactant Terminology to Performance in Sand-Based Putting Greens” found that differences between soil surfactants marketed as “penetrants” or “retainers” were inconsistent, if present at all.