Preparing for the fall class I co-teach, I was sitting out by the shady fountain in the old Zimmerman Library courtyard this morning, when I had occasion to spill carne adovada from my breakfast burrito on my copy of Jose Rivera’s book chapter on “The historical role of acequias and agriculture“. (Technically it’s my co-instructor …
Continue reading ‘The repartimiento – a deep history of sharing water’ »
Imperial Valley resident (and Imperial Irrigation District board member) Jim Hanks: The Salton Sea is a real place to me and I have always seen it as a lake, because that’s what it is. I also see it as hydrologically, geographically and morally connected to the Colorado River, and I appreciate the effort to place …
Continue reading ‘The Salton Sea: “treat it as a real place that impacts real people’s lives”’ »
Thanks to continued high flows, this is now the wettest year on New Mexico’s Middle Rio Grande since 1995. My measurement point is the San Felipe gauge on the Rio Grande in north-central New Mexico. The measure is total flow to date this year, compared to total flows at this point in all previous years …
Continue reading ‘The biggest year since 1995 on New Mexico’s Middle Rio Grande’ »
Since early spring, I’ve taken my early morning bike ride through downtown Albuquerque to the old Route 66 crossing of the Rio Grande. Every time, I’ve stopped to check out this little sandbar island, anchored by a tenacious community of willows. I started watching closely after I saw a pair of geese, frantic as the …
Continue reading ‘Resilience and my little Rio Grande sandbar island’ »
Brad Udall, Doug Kenney, and I wrote a thing about the Colorado River Drought Contingency Plan and what comes next: The plan is historic: It acknowledges that southwestern states need to make deep water use reductions – including a large share from agriculture, which uses over 70% of the supply – to prevent Colorado River …
Continue reading ‘Beyond the “Drought Contingency Plan” on the Colorado River’ »
tl;dr Folks in the Upper Colorado River Basin are only using ~60 percent of their Colorado River Compact allocation Use has been basically flat since 1990. It is not going up. A couple of weeks ago I got an email, with an attached spreadsheet, from my co-author Eric Kuhn. It was his distillation of data …
The 1946 Bureau of Reclamation report projecting future development of the Colorado River – “A Natural Menace Becomes a National Resources” was its subtitle – included a picture of Hoover Dam with the caption: “World’s highest dam only partly harnesses the wild Colorado River.” The report laid out a staggeringly ambitious plan for the rest …
Continue reading ‘New Mexico’s shrinking Gila River diversion proposal shrinks some more’ »
If you want to dam rivers, as we were inclined across much of the 20th century, the location of the current Parker Dam on the Lower Colorado River makes sense – a narrow gap just downstream from the confluence of the Colorado and Bill Williams rivers on the Arizona-California border. I paid a visit last …
Continue reading ‘How Parker Dam might have been the Colorado River’s first’ »
With little water storage to speak of in the Imperial Valley, the flow of the All-American Canal west from Imperial Dam integrates, in close to real time, the collective decisions of a thousand farmers growing crops on half a million acres. A “hydrograph” is a commonly used tool for looking at the flow of water …
Continue reading ‘The hydrograph of the All-American Canal’ »
The unusually wet winter (with an assist from new Colorado River Drought Contingency Plan water reduction rules) has substantially reduced the near-term scare-the-crap-out-of-me risks on the Colorado River for the next few years, according to new Bureau of Reclamation modeling. Modeling done in January showed significant risk – a nearly one in three chance – …