Known as the California Delta, the estuary is among the state’s most important sources of water — and most consistent flashpoints over environmental protection. Donald Trump first saw the ...

delta, blind, ria, tectonic, and fjord. These categories were developed based on the overall relief of the region and the extent to which circulation is restricted near the mouth of the estuary.

Tunnel opponents also fear for the Delta’s fish, birds and other wildlife. Already strained by the state and federal pumps that can reverse river flows and derail fish migrations, the estuary has ...

Delta smelt are tiny fish — most adults are less than 3 inches long — and nearly translucent, with a steely-blue sheen on their sides. As larvae, they start out eating microscopic food like ...