A Look at the Delta through the years and the latest attempt to mess with Nature or Revise the Delta!

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INDEX

TIMELINE

SUMMARY

ISSUES

DELTA MAPS

CANAL PLANS

HISTORIC MAPS

1820-1859

1860-1879

1880-1899

1900-1939

1940-1979

1980-1989

1990-1999

2000 DOCS

2001 DOCS

2002 DOCS

2003 DOCS

2004 DOCS

2005 DOCS

2006 DOCS

2007 DOCS

2008 DOCS

2009 DOCS

2010 DOCS

2011 DOCS

2012
Docs


Terms of Use

Delta Facts

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Water Quality Issues:  Salinity, Toxins, Aquifers and other effects of Delta Water Exports

     While the BDCP and DSC Delta Plan focus more on water quality for fish or for use of the water outside the Delta and/or south of the Delta, others continue to look at the EFFECTS on water quality for humans and the environment in and around the Delta.  Start with the historical FACT that the lands of the Delta were SOLD for the specific reason to develope prim farm lands.  Using the Delta for water conveyance was an afterthought.  The Delta area was NEVER A "BRACKISH" MARSH...it has been a fresh water area for hundreds and thousands of years if one just looks at the soil types.  And use common sense...who would work so hard to reclaim lands in brackish water where it would be hard to grown marketable produce in 1850 to 1900?

     In any case, water flow and water quality are the main issues in the Delta.  So the water quality documents are divided into several series of pages:
1) Salinity...it is a big issue all over California!
2)  Selenium from the west side of the San Joaquin Valley and its impacts on people, fish, birds, the Delta and the SF bay
3)  Other toxins like arsenic, mercury and amonia
4)  Bay ARea aquifer impacts from the BDCP-expected effect on water quality for drinking and the environment   Updated 3-6-2012
5)  DOC and the San Joaquin River issues


     For a smattering of water quality maps, see below.  Click on the maps below to see larger versions of each map.  The first two maps show the occasional salinity intrusion into the Delta over two periods of time.  Prior to 1943 the Delta's fresh water might get higher salinity from mixing with the saltwater of the San Francisco Bay if it was a really dry year.  After the Federally-funded State Water Project was completed, as part of the agreement between the governmental agencies and the Delta landowners, salinity intrusion into the Delta was limited to a specific area.  To keep salinity at or below the "x2" mixing area, fresh water was released from the damns that had been constructed that was withholding fresh water that would normally flow through the Delta.  Look at maps representing water quality studies over the last 50 years and you will see that a very basic rule is evident:  The Delta has fresh water and flows from the rivers and streams above the Delta must be allowed to continue to stop saltwater intrusion into the Delta.  Water quality and flow is also very closely related to the decline if native fish populations of the Delta; hense the volume of reports and studies on fish!  To see the studies that generated the maps, go to the different links on the left, by year or time period of Delta history.

maps/salinity-toxins/2008_carbon_s_sites.pdf

 

 

maps/salinity-toxins/north_delta_wd.pdf

maps/salinity-toxins/04-WaterQuality.pdf

maps/salinity-toxins/circ1215.pdf

maps/salinity-toxins/delta_salinity.pdf

 

maps/salinity-toxins/DRERIP_Mercury_Alpers-et-al_24Jan08_Final_w_cvr[1].pdf

 

 

 

maps/salinity-toxins/R_207JLMap6_6.pdf

maps/salinity-toxins/R_207JLMapD_4.pdf

 

maps/salinity-toxins/sj_fish_mercury.pdf

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   
   
   
   
 Index Summary 
Compiled by Delta citizens and Delta Voices Last Modified :01/15/14 04:34 PM Copyright 2009-2013 ,