Vegas: It’s easier to conserve water if you’ve been wasting a lot to begin with

Back in the 1980s, a researcher named Lawrence Hamilton (gated JSTOR paper here) studied water use and conservation behavior among the residents of 431 homes in Concord, New Hampshire. Concord’s a classic case – a slow, steady population increase putting pressure on supply that’s manageable during wet times but that became a problem in 1980, …

Continue reading ‘Vegas: It’s easier to conserve water if you’ve been wasting a lot to begin with’ »

“running water which is salty”

In his book Border Oasis, Evan Ward tells the story of the transborder conflict between the United States and Mexico over salinity in the Colorado River. “Unfortunately,” Ward writes, “sometimes when one region solves its salinity problems, it creates new salinity problems for people downriver.” The conflict Ward describes began in 1961 when farmers on …

Continue reading ‘“running water which is salty”’ »

For now, some breathing room on the Colorado River

I suppose it’s a sign of the times on the Colorado River that a January forecast of 95 percent of average flow into Lake Powell counts as good news. Since green on the Colorado Basin River Forecast Center map runs from 90 to 110 percent, we get green. It’s only a little bit below average! …

Continue reading ‘For now, some breathing room on the Colorado River’ »

Record Upper Colorado River Basin water use in 2011

According to the U.S. Bureau of Reclamation’s new Consumptive Uses and Losses Report (pdf), consumptive use of Colorado River water in the states of the upper basin (Colorado, New Mexico, Utah, Wyoming and a sliver of Arizona) reached 4.281 million acre feet in 2011, the highest on record. The previous high was 4.245 million acre …

Continue reading ‘Record Upper Colorado River Basin water use in 2011’ »

fifty years of drought

From Jonathan Overpeck last month in Nature (gated): The complexity of these megadroughts still defies complete explanation and yet it implies that unusually persistent anomalies of sea surface temperature can combine with amplifying changes in vegetation and soil to drive droughts that — if they happened today — would outstrip many of our institutional capacities …

Continue reading ‘fifty years of drought’ »

Simon Rifkind’s great mistake and the shortfall on the Colorado River

tl;dr – In 1960, U.S. Supreme Court Special Master Simon Rifkind made a fundamental mistake in calculating how much water was then available in the Colorado River Basin, and how much might be available in the future. The court, in its ruling in the case of Arizona v. California, accepted Rifkind’s math. The consequence is …

Continue reading ‘Simon Rifkind’s great mistake and the shortfall on the Colorado River’ »