Barrier Breaching Processes and Barrier Spit Breach, Stone Lagoon, CaliforniaINTRODUCTION - Stone-Lagoon0002BREACH PROCESSESBREACH SUSCEPTIBILITY INDEXHUMBOLDT LAGOONSMARCH 2002 BREACH OF STONE LAGOONCONCLUDING DISCUSSION - Stone-Lagoon0007ACKNOWLEDGEMENTS - Stone-Lagoon0008REFERENCES - Stone-Lagoon0009Figure 1. Mecox Pond, breached the morning of February 14, 1998, (photographs by N. Kraus, afternoon of February 14).Figure 2. Little Pikes Inlet (barrier island breach), Long Island, New York, shortly after openingFigure 3. Location map, Stone Lagoon, northern California.Figure 4. Mean annual rainfall by month (data obtained from Desert Water Institute;Figure 6. Stone Lagoon, looking northeast, December 1999 (photograph by G. Todoroff).Figure 8. Stone Lagoon spit breach, looking west, March 16, 2002 (photograph by G. Todoroff).Figure 10. Stone Lagoon breach, looking east, March 18, 2002 (photograph by A. Militello).Figure 11. Time sequence (a-d) of vertical aerial photographs, Stone Lagoon breach, with Pacific Ocean at top of pictures]Figure 12. Stone Lagoon: contours of dry perimeters at four sampling times within 1 month after breaching.Table 1. Representative values of the breach susceptibility indexTable 2. Parameters controlling spit geometry and evolution, and the associated process (from Kraus 1999)Table 3. Photograph availability, year 2002, local timeStone-Lagoon