Professor Emeritus of Civil Engineering & Environmental Science
Los Angeles, CA, UNITED STATES
Seaver College of Science and Engineering
Ph.D., Zoology
1982
M.S., Biology
1975
B.Sc., Marine Biology
1972
Environmental Monitoring and Assessment
2017-05-10
Screening for the prevalence of antibiotic-resistant bacteria (ARB) was done at the Ballona Creek and Wetlands, an urban-impacted wetland system in Los Angeles, California. The goals were (1) to assess the overall prevalence of ARB, and (2) compare differences in ARB abundance and the types of antibiotic resistance (AR) among the following sample types: lagoon water from Del Rey Lagoon, urban runoff from Ballona Creek, and water from the Ballona Wetlands (tidal water flooding in from the adjacent estuary, and ebbing out from the salt marsh).
view moreEnvironmental Monitoring and Assessment
2015-03-01
Stratification and loading of fecal indicator bacteria (FIB) were assessed in the main tidal channel of the Ballona Wetlands, an urban salt marsh receiving muted tidal flows, to (1) determine FIB concentration versus loading within the water column at differing tidal flows, (2) identify associations of FIB with other water quality parameters, and (3) compare wetland FIB concentrations to the adjacent estuary.
view moreEnvironmental Toxicology and Chemistry
2013-02-01
Many storm water best management practice (BMP) devices function primarily by capturing particulate matter to take advantage of the well-documented association between storm water particles and pollutants. The hydrodynamic separation or settling methods used by most BMP devices are most effective at capturing medium to large particles; however, these may not be the most predominant particles associated with urban runoff.
view moreEnvironmental Monitoring and Assessment
2012-07-01
A study was performed in Del Rey Lagoon, City of Los Angeles, to determine if the lagoon was as a source or sink for fecal indicator bacteria (FIB: total coliforms, Escherichia coli, enterococci) and to screen for the presence of other potentially pathogenic bacteria.
view moreBulletin of the Southern California Academy of Sciences
2006-01-01
Densities of fecal indicator bacteria (FIB) represented by total coliforms, E. coli and enterococci were measured within tidal channels of the Ballona Wetlands (Los Angeles County) to see if the wetlands act as a sink or source for these bacteria and to measure increases in FIB densities during wet weather.
view moreBulletin of the Southern California Academy of Sciences
1995-05-05
In the past century, the Southern California coastal zone, like many coastal zones in this country, has been changing from rural and agricultural uses to urban and industrial, dramatically altering the nature of our watersheds and adjacent coastal shelves.
view moreBulletin of the Southern California Academy of Sciences
1995-01-01
The City of Los Angeles' Hyperion Treatment Plant presently operates two submarine outfalls: the 1-Mile outfall was used until 1959, but now is used only during emergencies; the plant's main outfall, the 5 -Mile, presently discharges about 1,211 X lO^ld"' of mixed primary and secondary effluent at a water depth of 60 m. A third outfall, the now defunct 7-Mile sludge line, operated from 1957- 87, discharging about 15 x 10^ 1 d"' of digested sludge into 100 m of water at the head of the Santa Monica Canyon.
view more