Streambed of the Tijuana river.

Trash in streambed of the Tijuana river.

Tijuana river neat its mouth, Imperial Beach, California.

Smuggler's Gulch, at Tijuana river estuary, California.

Smuggler's Gulch, at Tijuana river estuary, California.

Main culvert at Smuggler's Gulch, at Tijuana river estuary, California.

Main culvert at Smuggler's Gulch, at Tijuana river estuary, California.

Smuggler's Gulch, at Tijuana river estuary, California.

Small remnant stream at Tijuana river estuary, California.

Small remnant stream at Tijuana river estuary, California.

Small remnant channel at Tijuana river estuary, California.

Small remnant channel at Tijuana river estuary, California.

Small remnant channel at Tijuana river estuary, California.

Small remnant channel at Tijuana river estuary, California.

Culvert at Yoghurt Canyon (los Sauces), Tijuana river estuary, California.

Culvert at Yoghurt Canyon (los Sauces), Tijuana river estuary, California.