Density Dependence and Vulnerability of Fish to Entrapment by Offshore-Sited Cooling-Water Intakes

G. L. Thomas, R. L. Johnson

Research output: Contribution to journalConference article


Simultaneous measurements of the offshore fish density and inplant fish entrapment were made during eight surveys at four electric-generating stations along the Southern California coastline in 1979. Hourly estimates of the fish biomass in the vicinity of the cooling-water intake sites with state-of-The-Art precision were made possible with hydroacoustic techniques. Synchronous hourly measurements of fish entrapment were made in order to describe the density dependence of fish entrapment. An entrapment vulnerability statistic, the ratio of the weight (kg) of fish entrapped in the plant (E) to the weight (kg) of fish offshore in the vicinity of the intake (B), i.e.,E/B, was employed to describe the effect of water transparency, the velocity-cap and volume of flow on the entrapment of fish.

Original languageEnglish (US)
Article number1151382
Pages (from-to)504-506
Number of pages3
JournalOceans Conference Record (IEEE)
StatePublished - Jan 1 1980
EventOCEANS 1980: An International Forum on Ocean Engineering in the ''80s - Seattle, United States
Duration: Sep 8 1980Sep 10 1980


ASJC Scopus subject areas

  • Oceanography

Cite this