Author Archives: UC Davis Center for Watershed Sciences

Post-drought groundwater in California: Like the economy after a deep “recession,” recovery will be slow

by Thomas Harter The 2012-2016 drought has made many of us keenly aware of how “empty” our groundwater “reservoirs” have become. As the recent series of atmospheric rivers have left us with a massive snowpack, full surface water reservoirs (with … Continue reading

Posted in Groundwater | Tagged | 3 Comments

Evading Dam-Nation to Build a Working Floodplain on the Cosumnes River

by Michelaina Johnson This winter’s barrage of rain storms has driven most Central Valley rivers to the point of near record-breaking flooding, and the Cosumnes River is no exception. On February 10th, the Cosumnes hit the second highest peak flow … Continue reading

Posted in flood, Floodplains | Tagged | 6 Comments

What do stream fish do during flood flows?

By Peter B. Moyle My local stream, Putah Creek, looks like a river these days.  Water is pouring down the Glory Hole of Lake Berryessa and rushing in muddy turmoil from the ‘dry’ creeks that are its main tributaries.   The … Continue reading

Posted in Fish, flood, Floodplains, Salmon | Tagged | 1 Comment

California’s Floods of 2017, so far

by Jay Lund What a wild water month!  Floods, spillway damage, and levee failures!  Mass evacuations! And Donald Trump and Barack Obama are not even remotely to blame! Flood control and preparation are vitally important for California.  Now we remember. … Continue reading

Posted in California Water, flood, Planning and Management, Stressors, Uncategorized | Tagged | 4 Comments

Yolo Bypass: the inland sea of Sacramento

By Megan Nguyen Land or Sea? The recent rains early this year brought much needed relief from the five-year drought in California. Reservoirs are full, mountains are covered with snow, and flood control structures are being used, some for the … Continue reading

Posted in flood, Floodplains, Planning and Management | Tagged | 4 Comments

Reconciling conservation and human use in the Delta

By John Durand, Peter Moyle, and Amber Manfree  In a previous blog, we presented a Grand Scheme for habitat conservation in the North Delta Arc (the Arc). This follows up on our earlier broad vision for recreating a Delta more friendly … Continue reading

Posted in Conservation, Delta, reconciliation | Tagged , , | 1 Comment

California’s Wettest Drought? – 2017

By Jay Lund Wet.  After five years of drought, most of California finally has become wet.  The mountains are exceptionally wet and covered with snow.  The state’s reservoirs are fuller than their long term average (with a few exceptions).  Flood … Continue reading

Posted in California Water, Drought, Uncategorized, Water Supply and Wastewater | Tagged | 20 Comments

Episode 3: “Unraveling the Knot” Water Movement in the Sacramento-San Joaquin Delta – Managing Flows

By William Fleenor, Amber Manfree, and Megan Nguyen Delta water diversions have significant effects on flows and water quality within the Delta. Diversions can re-direct river flows and draw salt water inland from the sea, impacting water quality and the … Continue reading

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Episode 2: “Unraveling the Knot” Water Movement in the Sacramento-San Joaquin Delta – Tidal Forces

By William Fleenor, Amber Manfree, and Megan Nguyen Tides are the biggest driver of Delta flows, and in Episode 2 we look at their impacts in different locations under a variety of inflow conditions.  Tides have a twice-daily cycle in … Continue reading

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Episode 1: “Unraveling the Knot” Water movement in the Sacramento-San Joaquin Delta

By Bill Fleenor, Amber Manfree, and Megan Nguyen In 2010, John DeGeorge of RMA, Inc used animated model results to illustrate specific flow and water quality issues in the Delta to the State Water Board. The Center for Watershed Sciences, … Continue reading

Posted in Delta | Tagged , , | 8 Comments