Report: DWR's Dual Conveyance for Delta Task Force

yzer

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DWR presented “An Initial Assessment Of Dual Delta Water Conveyance" to the Delta Blue Ribbon Task force late in April.

Find it here: http://www.deltavision.ca.gov/BlueRibbonTaskForce/April2008/Handouts/Item_5d_Report.pdf

Dual Conveyance is considered the preferred alternative of Department of Water Resources (DWR) and the misleadingly named Bay/Delta Conservation Plan (BDCP).

Some highlights from this document:

“The studies of a Dual Conveyance system evaluate maximum allowable diversions into an isolated conveyance component of 5,000 cubic feet per second (cfs). For each of the evaluated Dual Conveyance scenarios the reliability of exporting water significantly increases of the current operations of the SWP and the CVP. The increase in exports is primarily due to reductions in Delta outflow."

“Under each of the Dual Conveyance operation scenarios, the average monthly position of X2 shifted upstream about 2 km more than the current operations. This is due to the increased amounts of water being exported from the Delta under the Dual Conveyance operation scenarios."

Note: X2 is water science code for the averaged saltwater intrusion border line. What they are saying here is that saltwater intrusion will be moved 2 kilometers upstream with the Dual Conveyance proposals. Is that nasty, or what?

As I maintain in many posts on this subject the proponents of the peripheral and dual conveyance projects do not show science that will demonstrate the environmental effects of these projects. You won't find any in this assessment, either. DWR, SWP and Bureau of Reclamation have built California water projects for seventy years with only the promise to fix environmental problems after their projects are built. The logic behind DWR's assessment of dual conveyance is no different than the big ditch thinking during the 1930's: dig it or build it first and look at the damage later. This is the same old bull pucky that made San Joaquin salmon extinct and is turning the California Delta into a pond full of toxic blue-green algae, catfish, bullheads and funky Asian clams.
 
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