The Sandias

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Sandias over Albuquerque, June 2018

The remnants of Hurricane Bud blew through central New Mexico today, the first big rain we’ve had since forever. As the rains were clearing out, I hopped on my bicycle to check out the neighborhood flood control channel (as one does) and lucked into one of Albuquerque’s great sunset treats.

It happens when the sun drops below the clouds at sunset and lights up the Sandias, the mountain range that looms over Albuquerque to the east. When I say “loom”, I mean a mile of vertical elevation rising straight out of the city. Lit up with the magic of sunset.

Twenty-eight plus years here, and it never gets old.

Amy Haas to replace retiring Don Ostler as Executive Director of the Upper Colorado River Commission

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Amy Haas, deputy director and general counsel of the Upper Colorado River Commission, will replace the retiring Don Ostler as the UCRC’s executive director July 1. Amy, formerly general counsel of the New Mexico Interstate Stream Commission, has been with the commission since last year, and has a long history of working within the interstate Colorado River governance process, including playing a central role in the negotiation of the recently signed U.S.-Mexico agreement known as Minute 323. From the official release:

Felicity Hannay, U.S. Commissioner and Chairman of the Upper Colorado River Commission, is pleased toannounce the selection of Ms. Amy I. Haas to be the new Executive Director of the Commission effective July 1, 2018. Haas replaces Don Ostler, who has been Executive Director since 2004 and will be retiring from full-time service at the end of June. Ms. Haas has been Deputy Director and General Counsel since June, 2017.

“Amy has shown great knowledge of the Commission and its work, and we are very lucky to have someone with her qualifications and experience stepping in behind Don,” said Hannay. “He leaves big shoes to fill, but the Commission believes Amy can jump right in and continue the important work of the Commission in its role with the Upper Division states.” The Upper Colorado River Commission was created by the Upper Colorado River Basin Compact of 1948, and is made up of Commissioners from CO, NM, UT, and WY, along with the federal chairman who is appointed by the President.

At Glenwood Springs, the fourth driest Colorado River flows in a half century

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A typical John Fleck morning these days involves a cup of coffee (or two) and a curlup in the comfy chair as dawn creeps over my backyard while I wander the western United States looking at USGS stream gauges.

Today’s gauge-of-the-day is my friend and colleague Eric Kuhn’s, at Glenwood Springs, Colorado. It’s just downstream from the junction with the Roaring Fork. Flows of ~3,600 cubic feet per second on June 13 were the fourth lowest since gauging at that spot began in 1967.

Important to understand what this is telling us. This is the measure for the main stem of the Colorado as it flows out of the mountains over the divide from Denver. It is not what in overall basin management we think of as the “Colorado River” as a whole, which the water managers in the state of Colorado charmingly call the “big river”. At this point the “Colorado” is just one of three big tributaries – the Green, the Colorado, and the San Juan. To understand the overall health of the “big river” system, you need to look at all three. More on that tomorrow.

Colorado River at Glenwood Springs

The driest years, in order:

  1. 2012: 2,230 cfs
  2. 2002: 2,280 cfs
  3. 1977: 2,870 cfs

Median flow for this point in the year is ~9,600.*

* There’s a slight discrepancy between the numbers reported on the USGS web site when you click on the link above, versus the numbers I’m getting downloading the USGS data and doing my own analysis directly. Dunno. YMMV.

** Code here.

 

Circa 1983, an early view of climate change and western water

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From New York Times reporter Philip Shabecoff’s October 1983 piece examining some of the more significant findings in a new National Academies report on the implications of climate change:

Paul E. Waggoner, a member of the assessment committee, said in an interview that ”people in California will be drinking their water,” instead of using it for irrigated farming.

The report was entitled “Changing climate : report of the Carbon Dioxide Assessment Committee / Board on Atmospheric Sciences and Climate, Commission on Physical Sciences, Mathematics, and Resources, National Research Council.” Here’s the chapter by Waggoner and Roger Revelle on the implications of climate change for the Colorado River and western water.

Central New Mexico water agency cutting back some of its irrigators

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Reservoir levels dropped over the weekend past a critical trigger point, causing the Middle Rio Grande Conservancy District to curtail water deliveries this week to about 5,000 acres of farmland in central New Mexico.

Middle Rio Grande Conservancy District water in Albuquerque’s North Valley, June 2018

With El Vado Reservoir on the Rio Chama just 26 percent full, the decision to cut deliveries to the MRGCD’s “water bank” irrigators was inevitable. These are farmers who had sold off their senior water rights, mostly to cities, but are stilled allowed to irrigate for a higher fee and subject to the availability of a pool of “surplus” water.

That “surplus” (I put scare quotes around this because there’s a serious policy argument about whether such a surplus really exists, and whether the “water bank” is a good idea) doesn’t exist in this very dry year.

The acreage here – 5,000 acres – is interesting. Water bank acreage had been running at about 2,000 acres per year in recent years. The jump is likely not an actual increase in irrigated acres, but rather appears to be people who had already sold off their priority rights (pre-1907 rights, the senior rights in the valley) and were just irrigating anyway. The District has been cracking down on that, so many of those people are now paying up and joining the water bank. Which means that, in a dry year, there is now a mechanism to cut them off.

Drought, climate change – we know more than we used to

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Ben Cook, Justin Mankis, and Kevin Anchukaitis have an extremely helpful review paper in Current Climate Change Reports (ungated, thanks) sorting out what we do and don’t know about the impact of climate change on droughts.

The IPCC’s Fifth Assessment Report was cautious in its assessment of our knowledge of drought, reporting only “low confidence” in then-current assessments of the detection and attribution of a climate change impact on drought:

In the years since the AR5 was published, however, there have been steady advancements in our understanding of drought dynamics and the associated physical processes. These insights have been generated through further development of the paleoclimate record, new analyses of recent and historical drought events, and the widespread use and interrogation of climate models.
Those following the Colorado River Basin will be unsurprised by the results here:
Focusing on Colorado River streamflow, Woodhouse et al. [109] compared this most recent drought period (2000–2012) against similar magnitude droughts in the 1950s (1950–1956) and 1960s (1959–1969). They found that while both the 1950s and 1960s droughts were linked to significant precipitation deficits, precipitation in the basin was near normal in the 2000s and this latest drought was likely driven by the much warmer temperatures. Udall et al. [110] subsequently concluded that historical warming of 0.9?C has reduced Colorado River flow by 2.7–9%, which would account for roughly one third of flow losses during the 2000–2014 drought in the basin. McCabe et al. [111] found similar effects of warming on streamflow in the Upper Colorado River Basin, attributing reductions in streamflow of 7% over the last three decades to increased evapotranspiration and snowmelt from warming in the spring and summer (April–September).
Tons more on specific global droughts of note, including Australia and California. (Read the paper!) Here’s the key conclusion:
Our knowledge of climate change and drought has advanced considerably since the publication of the AR5. This expanded body of knowledge includes numerous studies
that more confidently attribute recent droughts to climate change and paleoclimate analyses that highlight the unusual severity of recent droughts in the long-term context of the Common Era. These findings represent a marked shift from the much more conservative statements regarding drought and climate change in the AR5, which were appropriate for the time given the state of the science.

Golf

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According to the USGS, there are 1,300 acres of golf course in Bernalillo County (Albuquerque etc.), using 6,100 acre feet per year of water. Which makes the water policy implications of this this Nolan Gray story fascinating:

Golf is dying, many experts say. According to one study by the golf industry group Pellucid Corp., the number of regular golfers fell from 30 to 20.9 million between 2002 and 2016. Ratings are down, equipment sales are lagging, and the number of rounds played annually has fallen….

Golf courses and country clubs currently consume massive amounts of relatively underutilized land in cities and suburbs. Across the country, as courses and clubs begin shutting down, hundreds of thousands of acres of land could soon start opening up for infill redevelopment. While not so great for golfers, this could be a boon for cities, especially those facing a housing crunch.

Lowest flow ever recorded on New Mexico’s Gila River

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If my math is correct, flow on the Gila River gauge located near Gila, New Mexico, dropped today to the lowest ever measured, in a record that goes back 89 years.

The red line is the daily flow, in cubic feet per second, as measured by the U.S. Geological Survey. The cloud of gray lines is each previous year, in a record that goes back 89 years.

Record low flows on New Mexico’s Gila River

 

As I write this, the flow is 8.42 cubic feet per second. The previous record low came June 22, 2006, at 9.77 cfs. Look at how far that red line has dropped below the gray cloud. This is not simply a bad year. This is a far drier year than anything that river has seen in a very long time.