Deep below the surface of the ground in one of the driest parts of the country, there is a looming problem: The water is running out — but not the kind that fills lakes, streams and reservoirs.

New research shows that typically, less than 10% of land-building alluvium reaches the Bird’s Foot Delta region, the ...

Expected to take 90 days to complete, the project entails trucks hauling 30,000 cubic yards of sand from a Santa Ana River stockpile site and dumping it along a 1,500-foot stretch of North Beach.