Conservation: How to Feed a Beach

Sick shorelines make ponderous patients. When one of them begins to waste away under the pounding of winds and waves, engineers usually rush in to order heroic prescriptions—great stone seawalls and jetties reaching offshore to trap the escaping sand before it gets away from the beach. But last week the Army Corps of Engineers was ordering a different treatment for the ailing littoral south of Los Angeles. What this beach needs, say the engineers, is a permanently circulating supply of sand.

Tamed Rivers. Unlike some beaches of the U.S. East Coast, Los Angeles...

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