Author Archives: jaylund

About jaylund

Professor of Civil and Environmental Engineering Director, Center for Watershed Sciences University of California - Davis

The Collapse of Water Exports – Los Angeles, 1914

This is a re-post from 2019 with updated links for pictures and further readings. by Jay Lund Collapse of Los Angeles aqueduct pipeline through Antelope Valley from a major flood in February, 1914 (3-months after the aqueduct’s official opening) “In … Continue reading

Posted in Uncategorized | Leave a comment

The 2020-2023 drought continues for a fourth year?

by Jay Lund After three years of drought and two dry months, plus two wet weeks, into California’s “wet” season for 2023, California has become unsettlingly settled into this long drought.  Most cities have decreased their water use, some more … Continue reading

Posted in Uncategorized | 1 Comment

The Flow of California Water Policy – A Chart

by Jay Lund California water policy is often discussed and depicted as being impossibly complex.  In its essentials, it can be seen much more simply, as in the flow chart below.  Without extreme events (such as floods and droughts), the … Continue reading

Posted in Uncategorized | 2 Comments

Innovative Approaches for Flood Insurance Affordability

by Kathleen Schaefer People have been asking if Hurricane Ian will push the National Flood Insurance Program (NFIP) into an affordability crisis?  Some argue the NFIP is already there. Two weeks ago, the Greater New Orleans, Inc.’s Coalition for Sustainable … Continue reading

Posted in Uncategorized | 2 Comments

Happy New Water Year 2023!

by Jay Lund Happy New Water Year, 2023!  (October 2022 – September 2023) The first New Year celebration for California’s water wonks is October 1, the beginning of the new Water Year, the nominal beginning of California’s wet season.  California … Continue reading

Posted in Uncategorized | Leave a comment

You Can’t Always Get What You Want – A Mick Jagger Theory of Drought Management

by Jay Lund [This is a reposting of a post from February 2016, near the end of the previous drought.  For human uses, conditions seem somewhat similar to this point in the previous drought, so this perspective might be … Continue reading

Posted in Agriculture, California Water, Drought, Economy, Uncategorized | Tagged | 2 Comments

The vortex of executive activity

by Jay Lund The graphic below seems to apply to any bureaucracy, with larger bureaucracies showing this tendency more strongly.  In this vortex conception of management, one can often make more progress from the periphery than from the center of … Continue reading

Posted in Uncategorized | 3 Comments

Dissecting the use of water management plans in California

By Nicola Ulibarri California uses plans as a primary tool for managing water throughout the state. Regulations like the Urban Water Management Planning Act of 1983, Regional Water Management Planning Act of 2002, Water Conservation Act of 2009, and Sustainable … Continue reading

Posted in Uncategorized | 2 Comments

The Great Lakes and Invasive Species

This week’s CaliforniaWaterBlog post is an excerpt (Box 1) from a recent Delta Independent Science Board report on non-native species and the California Delta.  This excerpt summarizes the experience of the Great Lakes, and how its physical and ecological management … Continue reading

Posted in Uncategorized | 2 Comments

Follow the Water!

by Jay Lund People often have strange ideas about how water works.  Even simple water systems can be confusing.  When water systems become large complex socio-physical-ecological systems serving many users and uses, opportunities for confusion become extreme, surpassing comprehension by … Continue reading

Posted in Uncategorized | 10 Comments