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Control page.
Rivers and channels surrounding the central and western Delta have a limited ability for carrying flood flows. for example, a flood causing water levels in the north Delta to increase by 10 feet may only cause a 1-foot increase in water levels in the central and western Delta. Sedimentation, which limits the flood-carrying capacity of the channels, has occurred in various places throughout the Delta, particularly along the South Fork of the Mokelumne River. In 1986, the U.S. Army Corps of Engineers estimated the 100-year flood stages, shown on this map: part one shows the northern section of the Delta and part two shows the southern section of the Delta.