2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

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Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report Figure 1-16. Avian survey zones........................................................................................................... 73 Figure 1-17. Avian abundance by guild at Bolsa Chica during 2008 surveys ...................................... 80 Figure 1-18. Avian abundance by habitat type at Bolsa Chica during 2008 surveys............................ 84 Figure 1-19. Belding’s Savannah sparrow territories (March and April 2008)..................................... 89 Figure 2-1. Predicted flood shoal area................................................................................................. 100 Figure 2-2. Full Tidal Basin inlet bathymetry ..................................................................................... 102 Figure 2-3. Full Tidal Basin accretion and erosion comparisons between surveys............................. 103 Figure 2-4. Net sediment accretion rate per month ............................................................................. 104 Figure 2-5a. Minimum daily tidal elevations in the Bolsa Chica Full Tidal Basin (FTB) and at the Los Angeles Outer Harbor (LAOH) between January 20, 2007 and December 31, 2008 ................... 109 Figure 2-5b. Daily differences in lower low tide elevations between the FTB and the LAOH .......... 109 Figure 2-6. Maximum spring low tide muting..................................................................................... 111 Figure 2-7. Example comparison of recorded tides (February 2007) at FTB with the ocean tides (LAOH).......................................................................................................................................... 112 Figure 2-8. Location map .................................................................................................................... 115 Figure 2-9. Beach profile data used in CCSTWS-OC......................................................................... 117 Figure 2-10. Beach profile survey operations...................................................................................... 119 Figure 2-11. May 2008 and October 2008 beach widths..................................................................... 124 Figure 2-12. Long-Term beach width changes, May 1963 to May 2008............................................ 125 Figure 2-13. Bolsa Chica monitoring period shoreline changes, October 2005 to October 2008....... 126 Figure 2-14. Long-Term subaerial volume changes, May 1963 to October 2008 .............................. 127 Figure 2-15. Bolsa Chica monitoring period subaerial volume changes, Oct. 2005 to Oct. 2008 ...... 128 Figure 2-16. Long-Term shorezone volume changes, May 1963 to October 2008............................. 129 Figure 2-17. Twelve -Month average berm width at Corps Station 247+88....................................... 131 Figure 2-18. Twelve -Month average berm width at Corps Station 307+88....................................... 131 Figure 2-19. Twelve-Month average berm width at Corps Station 424+44........................................ 132 Figure 2-20. Shoreline changes at upcoast transects, October 2005 to October 2008 ........................ 133 Figure 2-21. Shoreline changes at downdrift transects, October 2005 to October 2008..................... 133 Figure 2-22. Subaerial volume changes at upcoast transects, October 2005 to October 2008............ 134 Figure 2-23. Subaerial volume changes at downcoast transects, October 2005 to October 2008....... 134 LIST OF TABLES Table 1-1. Area of habitats within the Bolsa Chica study area (May 2008). ........................................ 21 Table 1-2. Vegetation transect monitoring results (2008)..................................................................... 30 Table 1-3. Soils monitoring results (September 2008)........................................................................... 35 Table 1-4. Soil grain size analysis results (September 2008)................................................................ 36 Table 1-5. Summary of fish abundance in the Full Tidal Basin in 2008............................................... 42 Table 1-6. Summary of fish mass in the Full Tidal Basin in 2008........................................................ 44 Table 1-7. Water quality measurements taken during quarterly fish sampling in 2008........................ 48 Table 1-8. Summary of fish abundance in the Muted Tidal Basins in 2008. ........................................ 49 Table 1-9. Summary of fish mass in the Muted Tidal Basins in 2008. ................................................. 50 Table 1-10. Summary of fish abundance in the Muted Pocket Marsh in 2008. .................................... 50 Table 1-11. Summary of fish mass in the Muted Pocket Marsh in 2008. ............................................. 51 Table 1-12. Minimum and maximum standard length of all fish species captured by quarter at all station in 2008.................................................................................................................................. 52 Merkel & Associates, Inc. ii
Bolsa Chica Lowlands Restoration Monitoring 2008 Annual Report Table 1-13. Mean density of infauna in January 2008. ......................................................................... 58 Table 1-14. Mean biomass of infauna in January 2008......................................................................... 59 Table 1-15. Mean density of infauna in July 2008. ............................................................................... 59 Table 1-16. Mean biomass of infauna in July 2008............................................................................... 60 Table 1-17. Counts of epibenthic invertebrates detected in 1-m 2 quadrats in January and July 2008. . 63 Table 1-18. Counts of epibenthic invertebrates captured in fishing gear during 2008 quarterly fish sampling........................................................................................................................................... 64 Table 1-19. Summary of 2008 survey dates and number of birds and species observed...................... 76 Table 1-20. Avian abundance by survey (2008).................................................................................... 77 Table 1-21. Belding’s Savannah sparrow territories at Bolsa Chica in 2007 and 2008 ........................ 90 Table 1-22. 2008 California least tern reproductive success for each nesting location. ....................... 93 Table 1-23. 2008 Western snowy plover reproductive success for each nesting location. ................... 94 Table 2-1. Net increase in inlet sediment volume in comparison to pre-opening conditions. ............ 101 Table 2-2. Summary of spring high and low tides............................................................................... 110 Table 2-3. Beach nourishment history................................................................................................. 116 Table 2-4. Statistical range and depth of closure at Bolsa Chica area transects.................................. 122 Table 2-5. Beach width measurement program summary statistics, Jan. 2007 to Dec. 2008. ............ 130 Table 2-6. Range and depth of closure at Bolsa Chica area transects. ................................................ 130 LIST OF APPENDICES Appendix 1-A. 2008 Field Survey Dates Appendix 1-B. Sampling Location Coordinates Appendix 1-C. Cordgrass Monitoring Photos Appendix 1-D. Avian Guild Appendix 1-E. Avian Abundance by Zone in 2008 Appendix 1-F. Final Report Western Snowy plover Nesting at Bolsa Chica, 2008 Appendix 2-A. Monthly Tide Plots 2008 Appendix 2-B. Bolsa Beach Profile Plots Appendix 2-C. MSL Beach Width Appendix 2-D. Sediment Volume Data Appendix 2-E. MSL Beach Width Measurements Appendix 2-F. US Army Corps Beach Width Measurements Merkel & Associates, Inc. iii
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2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

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