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Accurate Heights for Tidal Wetland Restoration

This study focuses on accurate elevation and water level measurements at Elkhorn Slough for effective tidal wetland restoration. It covers vertical control, water level monitoring, marsh surface elevation monitoring, and vegetation response prediction. Published heights vs. levels, GPS data, and geospatial modeling are used for predicting tidal inundation and marsh distribution.

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Accurate Heights for Tidal Wetland Restoration

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  1. Accurate Heights for Tidal Wetland RestorationElevation and Water Levels at Elkhorn Slough photo: Tupper Ansel Blake Eric Van Dyke Geographical Ecologist Elkhorn Slough National Estuarine Research Reserve

  2. Elkhorn Slough National Estuarine Research Reserve 2

  3. 1931

  4. 1980

  5. 2007

  6. Vertical Control, Water Levels, and Marsh Surface Elevation

  7. = -33.60 meters HAE

  8. Vertical Control Network • Continuous GPS (CORS) • Deep-rod Benchmarks • Differential Leveling • Laser Topography • Height Modernization

  9. Vertical Control Network

  10. Published Heights vs. Levels GPS (ortho) Heights vs. Levels

  11. GEOID03 (0.025m contours)

  12. Central Coast Height Modernization (CENCHM 2007)

  13. Water Level Monitoring • Main Channel Gauge • Tidal Creek Gauges • Tidal Datums • Inundation Analysis • Additional Sites, Lower-cost Instruments

  14. Water Level Monitoring Sites

  15. Marsh Elevation Monitoring • Surface Elevation Tables • Feldspar Marker Horizons • Net Sedimentation Tiles • LiDAR Topographic Surveys • Laser Transect Surveys

  16. Marsh Surface Elevation Monitoring Sites

  17. Predicting and Monitoring Vegetation Response • Vegetation Sampling • Tidal Inundation and Marsh Distribution Prediction • Geospatial Modeling and Change Analysis

  18. Predicting Tidal Inundation

  19. Predicting Marsh Distribution

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