A rare but welcome bit of good news is the hot water “Blob” off the Pacific NW coast has shrunk in size and moved off shore. “Low salmon returns to many West Coast rivers in the last few years have been linked to the Blob, which reduced the availability of food when the salmon first entered the ocean as juveniles.” The Blog is still huge, however. “The question is, where does it go from here?”
The four dams on the Snake River are not in Central Oregon, but they have an enormous impact on Columbia River Basin (which incudes the Deschutes Basin) steelhead and salmon. These iconic populations are currently on the path to extinction. Recently, two tribes joined the chorus of voices calling for the removal of the dams. Last week 55 scientists released a letter that did likewise. Also last week, E&E News published another article detailing how these dams no longer make economic sense – hydro power is no longer cheap when compared to alternatives – and it would actually be cheaper to remove them than continue their operation. I would love to see the same analysis of the PGE/CTWS dams on the Deschutes River.
I have written about the “Blob” in the past (most recently, here and here). It is the much higher ocean temperatures in the North Pacific which have disrupted food chains and imperiled many historic fish runs. An argument can be made that ocean heating is currently the most worrisome of all the conditions leading to the drastic declines in salmon and steelhead populations in the Pacific Northwest. Here is the first part of a three-part article from NOAA discussing the Blob. Below is a graphic showing the re-emergence of the Blob this year. It could be worse than the original one, it already has more area of the most extreme warming, and is still forming.
Today the Bend Bulletin printed a response to my recent letter from Kurt Miller, the Executive Director of Northwest RiverPartners, a group that lobbies for hydroelectric facilities on the Columbia River. Predictably, Mr. Miller takes issue with my inclusion of hydro power dams in the list of reasons that anadromous fish populations are collapsing in the Columbia River Basin.Read More »
Yesterday, the Bend Bulletin printed a guest column I wrote on the grim outlook for steelhead and salmon in the Columbia Basin (including the Deschutes River). Above is a graphic that illustrates the problem. Here’s a NY Times article on the same topic. Whether some of these fish have 10 years left as I have read in some places, or 20 as reported in the NY Times, it is not a hopeful picture.
Irrigation season in Central Oregon continues into mid October, but the picture is already an interesting one. As this graph makes obvious, many local “lakes” are actually irrigation reservoirs and local rivers are used as irrigation canals. What is also obvious is the difference between water levels in Wickiup and other reservoirs.Read More »
Rod French, ODFW’s Mid-Columbia District Fish Biologist, presented at last week’s Fisheries Workshop. This annual presentation by ODFW has been largely unchanged for years, which is excellent news. Trout have been surveyed in the lower Deschutes since the 1970s and there have been no observed negative impacts on them from the operation of the Selective Water Withdrawal tower in Lake Billy Chinook. If anything, trout are larger and more abundant now, which is to be expected given the more natural temperature profile of the river. Below are a lot more details, or take a look at Rod’s presentation.Read More »