Author Archives: jaylund

About jaylund

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

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

by Jay Lund [This is a reposting of a CaliforniaWaterBlog.com 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

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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

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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

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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

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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

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Uncertainty in modeling, an Art Gallery

Water resource planners regularly rely on computer models to illuminate relationships between human- and natural-systems. Anyone who has tinkered with one of California water supply models knows this is a deeply left-brained exercise. During Winter 2021, as part of Jay Lund’s … Continue reading

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How engineers see the water glass in California

This is another dry year.  How do California’s engineers see a partially-full water glass?  Mostly the same as they did in the original 2012 version of this post, but we’ve added a few more perspectives. by Jay R. Lund Depending … Continue reading

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The 20th Anniversary of Another Good Idea: Ecogeomorphology

by Jeffrey Mount and Peter Moyle Several years ago on this site, we celebrated the 20th anniversary of the Center for Watershed Sciences—what we termed a “really good idea.”  That blog described the founding principles of the Center that live … Continue reading

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Parr for the Course – Holistic Fish Conservation

by Nan Frobish April 1, 2022 Juvenile Chinook Salmon lack rearing habitat in the Central Valley due to pervasive land use change and altered hydrology. Historically, juvenile salmon (or parr) had access to roughly four million acres of seasonal floodplain … Continue reading

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Drought Year Three in California, 2022

by Jay Lund 2022 is another drought year, although we won’t know exactly how dry for about another month.  Precipitation and snowpack this year in California are below average.  In addition, the prolonged dry and warm months of January through … Continue reading

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