California Surveyors Forums

The USGS Sacramento utilized InSAR, ground-water-level, and extensometer data to update the documentation of the magnitude and location of land subsidence occurring along the Delta Mendota Canal, in northern San Joaquin Valley, 2003-10. The Scientific Investigations Report (SIR) is released today.

Here is the press release:
http://www.usgs.gov/newsroom/article.as ... o5WucRDv50
The direct link to the report is:
http://pubs.usgs.gov/sir/2013/5142/

No new data for the SJV has been published for 30 years, so these data document that subsidence is not only continuing since then, but recently has been occurring at faster rates in the past decade.

P.S. YES, I'm enjoying retirement!

Thanks Marti for keeping us in the loop

The services you provided to the land surveying community were so appreciated and we sure miss you. But, I am happy to hear you are enjoying retirement!

Thanks for the post Marti. We are still conducting surveys of portions of the SJR. I don't know if this will have an impact on our work or not (horizontal locations of the low and high water marks), but it can't hurt to be informed.