The ecology of Tijuana Estuary, The ecology of Tijuana Estuary, California : a national estuarine research reserve ecologyoftijuana00zedl Year: 1992 channel edges, high marsh habitats, wetland- upland transitions, inland lagoon, and the adjacent upland. Several roads were present around the periphery of the wetland. However, there was only a path and no houses on the barrier dune adjacent to the salt marsh. Signs of agriculture in the floodplain are evident upstream of the estuary and north of what is now Monument Road. depression had been diked to create a sewage pond. Presumably, the dredge
The ecology of Tijuana Estuary, The ecology of Tijuana Estuary, California : a national estuarine research reserve ecologyoftijuana00zedl Year: 1992 channel edges, high marsh habitats, wetland- upland transitions, inland lagoon, and the adjacent upland. Several roads were present around the periphery of the wetland. However, there was only a path and no houses on the barrier dune adjacent to the salt marsh. Signs of agriculture in the floodplain are evident upstream of the estuary and north of what is now Monument Road. depression had been diked to create a sewage pond. Presumably, the dredged channel carried the overflow to the ocean. A bridge had been built over the dredged channel, probably to truck gravel from shallow pits just south of the inland lagoon. The mouth was Several physiographic features that changed in later years are noted in the photos of 1928, 1953, 1964, 1970, 1984, and 1985. In 1928 (Figure ), the dune had intermittent vegetation extending from what is now Imperial Beach Blvd. south to the estuary mouth. This is consistent with Purer's (1936) description of a rich flora that included shrubs such as lemonadeberry (Rhus integrifolia). Channels had major bare mudflats along their periphery. The inland lagoons clearly contained marsh vegetation throughout. Only a small area of channel is visible, and that was dredged to link the lagoon with the estuary. Two islands were present in the main north-south channel. The mouth (Figure ) had tidal flushing through an opening that angled southwest. A relatively large embayment was located south of the mouth, although it may have been shallower than indicated on the 1904 map (Figure ). What appear to be large salt pannes were present east of the the inland lagoon. By 1953 (Figure ), many changes had occurred both in the periphery of the estuary and within the area of tidal influence. Imperial Beach was a well-populated community: a military airport had been built east of the estuary; military ac
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