FIGURES-Continued 



Figure Page 



5 Diving Barge at an Intertidal Station 6 



6 Pipe and Rope System in Place at an Intertidal Diving Station 8 



7 Barge on the Crest of a Sand Wave 8 



8 A. Diagram of the Greer Plexiglass Underwater Compass Case 9 



B. Diagram Showing Specifications for Back Plate 9 



9 Megaripples on an Intertidal Sand Body, Parker Estuary 11 



10 Sand Waves on the Parker Estuary Flood-Tidal Delta 12 



1 1 Height-Spacing Relationships for Intertidal Bed Forms in the 



Parker-Essex Estuaries 13 



12 Location Map of Parker Estuary Flood-Tidal Delta Complex 15 



13 Aerial View of a Part of Middle Ground Flood-Tidal Delta 16 



14 Velocity Curves for Megaripples, Sand Waves and Transition Bed Forms .... 17 



15 Bed Form Migration Habit for Megaripples and Sand Waves Measured 

 Throughout a Complete Tidal Cycle 18 



16 Megaripple and Sand Wave SUpface Migration Rates 19 



17 Flood-Oriented Sand Wave Migration, Middle Ground Flood-Tidal Delta, 



Parker Estuary 20 



18 Vertical Aerial View of Intertidal Flood-Oriented Sand Waves on the 



Southeast Part of Middle Ground 21 



19 Sequence of Intertidal Estuarine Bed Forms Based on Increasing 



"Flow Strength" ". . . . 23 



20 Velocity Versus Log-Depth Plot of Intertidal Bed Forms in Estuaries 24 



21 SUpface Orientation of Major Intertidal Bed Forms, Middle Ground 

 Flood-Tidal Delta, Parker Estuary 25 



22 Bottom Profiles of Bed Form Morphology and Sand Body Geometry, 



Middle Ground Flood-Tidal Delta, Parker Estuary 26 



