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Index Ryer Island History Historic maps maps-other Maps of Ryer Island DRMS wrong on Ryer Delta floods Google Maps and Ryer Island Wrong_Ryer_maps Soils and Seismic data GPS Conflicts GPS - other Comparison of Seismic Map Results for Ryer Island and Long Point Island Maps Ryer Island in the California Delta Contact note: a spammer got into this website and destroyed the links bar. We are working to fix it 6-6-2010 |
T his website is being provided as a service to the businesses and
residents of
Ryer
Island, located within Solano County, California, in the hub of
the Sacramento-San Joaquin Delta region. This is NOT about the
other Ryer Island located in the Suisun bay and also in Solano
County.Very important governmental reports regarding Delta islands, most notably, the Delta Risk Management Strategy, Phase 1 report, or DRMS, currently provides incorrect data regarding Ryer Island flood history, flood risk and seismic risk. Here's a table comparing historic Delta Island flood data. Notice DWR keeps quoting 160 or more floods, but USACE says its more like 37 floods in the Delta since the levees were improved 1917 to 1940's. So what does this have to do with Ryer Island, just one of the Delta islands affected by DRMS data? DWR representatives did acknowledge the incorrect data use regarding Ryer Island, and agreed to contact their consultants who did the report, to get it corrected. Soils and Seismic data reports that confuse the Ryer Islands Ryer Island in the California Delta SHR |
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 We've found at least 17 mistakes in DRMS related to Ryer Island
alone! DRMS was published in "final" form by California's Department of
Water Resources (DWR) to validate decisions regarding the future of
the Delta, but the underlying Ryer Island
historical data is wrong
(see also DRMSf1_wrong_on_Ryer.pdf)
as to inundation history.
For that matter, inaccurate records were found for several other
islands in the North Delta Region, but we will leave that issue to
another day and forum. (You can click on the map to the right to see an enlarged version of
the a wrong DRMS-URS map completed for DWR for their risk analysis of
Sacramento Delta islands.)
 By March 2010, after repeated requests for review and correction, the new Delta Council is making decisions regarding Delta Islands, based on FALSE information, including the DWR data about Ryer Island. Note that on 11-18-09 DWR responded by email, indicating there isn't sufficient funding to correct DRMS Phase 1, so a request was made to remove the entire DRMS Phase 1 report from any new DWR reports, such as the California Water Plan Update 2009. See Request DWR then confirmed again they are having the consultant correct DRMS Phase 1 as to Ryer Island data, and will post the corrections so that other persons or agencies will not continue to utilize incorrect Ryer Island data. See latest email confirmation. Examples of other Delta-related agencies or groups currently utilizing wrong Ryer Island data in Delta presentations or reports include Delta Vision, PPIC, UC Davis professors. The "Ryer Island mistake" is very important to farmers, residents and businesses of Ryer-now and in the future- because DRMS has been used for the decision process leading up to and including the Bay Delta Conservation Plan (BDCP). The BDCP is an important legal document currently being utilized to validate substantial proposed changes to use of Delta islands and flow of Delta fresh water. Take a look at this table comparing the different agencies and organizations who published reports of Delta Island floods over the years. It appears the USACE (to the far right of the table) is closest to correct, based on local historical knowledge. One might assume if DRMS is wrong regarding one large Delta island, that it may also be wrong for other Delta islands. One might also assume responsible scientists and agencies that want to base decisions on facts would FIRST correct the DRMS before moving forward with modification to the Delta.
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Ironically, DWR published another
map in 2007 with the correct total for Ryer Island, if one insists
on counting flood occurrences from BEFORE the current levees were
built: |
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| Since underlying data for the maps for several Delta initiatives were produced in 2006 using incorrect island names, the incorrect maps used in 2009 reports may reflect back to the conflicts in island names found on Google in 2005 and 2006. | ||
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Two Delta islands named Ryer in Solano County! |
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| Another example:
Apparently from 2006 to the beginning of
2008 Google Maps listed
Ryer Island as "Tyler" island, and then showed the name Ryer Island
where the other Ryer Island (formerly Long Point Island) in the Suisun Marsh area is located.
When notified of the incorrect island name labeling, Google "fixed"
the problem by recognizing the later Ryer. However, in 2008, if you tried
Google map and directions function, it would send you to Grand Island
instead, at least for most of 2008 and early 2009. Google said to contact TeleAtlas. Even Solano
County mapping/survey office got involved and made a request for the
map correction in November 2008, but as of September, 2009, Google
or TeleAtlas still hasn't bothered to correctly label the area, even though the online status
check from TeleAtlas says "we see the problem" and later "we're
working on it". Since so many different governmental
agencies appear to use Google for mapping, the incorrect island
names (not just Ryer, but other Delta islands also) keep showing up,
/fir example, a prominent scientist named Jeffry Mount, who has for
years promoting restoration of the Delta, uses in his slide show
presentation about the delta a large map for the North Delta area,
which lists Ryer Island as "Grand Island". If even a prominent
scientist who has spent his career studying the Delta region uses
slides showing incorrect island names, clearly the problem of
incorrect mapping has become extensive. Why two Ryer Islands in Solano county? For some unknown reason, in 1981 the USGS mapping service officially renamed Long Point Island in Suisun Bay as "Ryer" and that was the beginning of the confusion. They even noted there is another Ryer Island in Solano County, 25 miles to the north! Since 1981, various governmental reports and assessments appear to transpose which Ryer Island they are talking about, and even physical data regarding the Ryer Island on Suisun Bay appears to have been used for Reports regarding Ryer Island by Steamboat Slough! Solano County mapping department has been notified of this conflict of names, and hopefully they will be able to get the online mapping services to make the corrections since citizen requests have not been responded to. |
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T In
addition, Ryer Island by Steamboat and Cache Sloughs has a wonderful and beautiful history as one
of the early-established and diverse agricultural and recreation islands of the California Delta
Region. From the 1850's, the area we know as Ryer Island has
been a great place to live, farm, fish and relax. This website
will be posting photos, maps, paintings and sketches from the last 150 years of life on Ryer
Island. Please check back! In the meantime, here's a link to the comments of one writer from that time:“Scenes of Wonder and Curiosity in California”. oor http://www.yosemite.ca.us/library/scenes_of_wonder_and_curiosity/alabaster_cave.html Please use the links to the left to go to the historic maps. Or to see "print screens" of the conflicting Delta Island Names, go to the GPS conflicts links . |
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