<P>The Military Engineer ? No. 66661 Californias Fragile Gem By Rob Vining, M.SAME, and Gen. Barry R. McCaffrey, USA (Ret.) Soil subsidence, seismic activity, species decline and increased salinity at the Sacramento-San Joaquin Delta are placing a delicate ecosystem, water supply and national food supply at risk. Water Planning & Management C alifornias Sacramento-San Joaquin Delta is many things to many peo- ple. It is home to 52 mammals, 22 reptile and amphibian species, 225 birds and 54 ?sh, including 130 listed endan- gered species. It is the source of potable water for two-thirds of Californias popu- lation. It also is the lifeline for the nations largest agriculture industry, which pro- duces as much as 25 percent of the na- tions food supply. Yet, outside of California and the engi- neering community, few people are aware of the Sacramento-San Joaquin Delta and its critical role in the world economic market and to national security. The delta is in a state of crisis that puts California, the eighth-largest world economy, at sig- ni?cant risk. Absent timely remedies to address key ecological and water convey- ance problems, a doomsday scenario may become reality. A House of Cards If a series of delta levees were to simul- taneously fail, the impact to California, the United States and the world would be staggering. Some experts predict the California agricultural industry could be permanently destroyed by a major ?ood. In fact, Californias Department of Water Resources (DWR) indicates that in a failure scenario the export of fresh water from the Delta could be interrupted for about 18 months. In addition to crippling Californias $27 billion agriculture industry, a major ?ood would ruin water quality for Southern Californias 25 million residents. Lack of potable water for 18 months would spiral the region into a sanitation crisis. Californias civil infrastructure also would be severely affected. The delta stores natural gas to accommodate peak wintertime demands, while electricity and gas transmission lines crisscross the region. Vital roads, including Interstate 5, state Route 4 and state Route 12, and sev- eral rail lines pass through the delta, as do the deepwater shipping channels leading to ports at Stockton and Sacramento. As the April 2010 eruption of Icelandic The Suisun Marsh, the largest brackish marsh on the West Coast, lies immediately west of the Sacramento-San Joaquin Delta. Photo courtesy HNTB Corp.</p> <UL><LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/1/1/">Front-Cover</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/2/2/">Inside-Front-Cover</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/3/3/">Page-1</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/4/4/">Page-2</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/5/5/">Page-3</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/6/6/">Page-4</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/7/7/">Page-5</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/8/8/">Page-6</a></LI> <LI><a href="http://www.stallionpublishers.com/publication/609/tofzxaosm/9/9/">Page-7</a></LI> <LI><a 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