Category Archives: Delta

Duel Conveyance: Delta Tunnel Dilemmas

by Jay Lund A new option has entered public discussion of Delta water supplies, having only one cross-Delta tunnel instead of two. The official State WaterFix proposal is for two tunnels (totaling 9,000 cfs capacity) under-crossing the Delta for 35 … Continue reading

Posted in California Water, Delta, Sacramento-San Joaquin Delta | 1 Comment

California WaterFix and Delta Smelt

by Peter Moyle and James Hobbs The delta smelt is on a trajectory towards extinction in the wild.  Heading into 2017, the spawning adult population was at an all-time low although this past wet winter has apparently seen a small … Continue reading

Posted in California Water, Conservation, Delta, Fish, Planning and Management, Restoration, Sacramento-San Joaquin Delta, Sustainability | Tagged , | 17 Comments

Down the DRAIN: California gets a jump on Delta tunnels

by Nan W. and Dunlay J. Frobish California took a step towards replumbing its archaic Delta water infrastructure by completing the first part of a contentious project. An intake for the first Delta tunnel was completed this fall, and with … Continue reading

Posted in April Fools' Day, California Water, Delta | 13 Comments

Pumping out the Inland Sea – Delta exports in a time of plenty

  By Jay Lund This is northern California’s wettest year of record, so far.  The Yolo Bypass has been flooded for most of this wet season, and is still flowing.  Are Delta water exports going to exceed the previous record … Continue reading

Posted in Delta | Tagged | 7 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 , , | 2 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

Posted in Delta | Tagged , , | 6 Comments

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

Posted in Delta | Tagged , , | 6 Comments

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 , , | 9 Comments

Human Use of Restored and Naturalized Delta Landscapes

By Brett Milligan, Assistant Professor, UC Davis Landscape Architecture and Sustainable Environmental Design and Alejo Kraus-Polk, PhD Geography candidate, UC Davis Current legislation and plans for the California Delta call for restoring tens of thousands of acres of aquatic and … Continue reading

Posted in Delta, Planning and Management, reconciliation, Restoration | Tagged , | 5 Comments

The North Delta Habitat Arc: an Ecosystem Strategy for Saving Fish

Peter Moyle, John Durand, Amber Manfree.  Center for Watershed Sciences, University of California, Davis. Delta native fishes are in desperate condition. Over 90% of fish sampled by diverse means belong to non-native species.  Native species such as delta smelt are … Continue reading

Posted in Delta, Uncategorized | Tagged , , | 7 Comments