Kevan is a science early career fellow working with the Center for Ocean Solutions’ (COS) Land-Sea Interactions focal area. He completed his Ph.D. in the Department of Civil & Environmental Engineering at Stanford University under Professor Alexandria Boehm. His dissertation focused on the fate and transport of fecal indicator bacteria and pathogens at the land-sea interface. In particular, Kevan examined beach sands as a non-point, diffuse source of fecal indicator bacteria (FIB) to coastal waters, determining the persistence of FIB and human pathogens in beach sands and the mechanisms by which they are transported from beach sands to coastal waters.
In partnership with MBARI, his work with the Center for Ocean Solutions focuses on testing the use of MBARI's Microfluidics Block (MFB) fitted to an Environmental Sample Processor (ESP), with the goal to develop rapid detection techniques for the presence and sources of coastal pollutants. Kevan also is developing concepts for the Center's broader Land-Sea Interactions focal area.
Kevan holds a B.S. in civil engineering from California State Polytechnic University, Pomona and an M.S. from the environmental engineering and science program at Stanford. Before entering college, he worked as a commercial and sportfishing captain in Southern California.
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K. M. Yamahara , L. M. Sassoubre, K. D. Goodwin, A. B. Boehm. 201_. Occurrence and persistence of human pathogens and indicator organisms in beach sands along the California coast. Submitted.
A. B. Boehm, K. M. Yamahara , S. P. Walters, B. A. Layton, D. P. Keymer, R. S. Thompson, K. L. Knee, and M. Rosener. 2011. Dissolved inorganic nitrogen, soluble reactive phosphorous, and microbial pollutant loading from tropical rural watersheds in Hawai'i to the coastal ocean during non-storm conditions. In press at Estuaries and Coasts.
E. J. Viau, K. Goodwin, K. M. Yamahara, L. M. Sassoubre, B. A. Layton, S. Burns, H-I Tong, S. H. C. Wong, Y. Lu, A. B. Boehm. 2011. Bacterial pathogens in Hawaiian coastal stream - associations with fecal indicators, land cover, and water quality. In press at Water Research .
N. R. De Sieyes, K. M. Yamahara, A. Paytan, A. B. Boehm . 2011. Submarine groundwater discharge to a high-energy surf zone at Stinson Beach, California, estimated using radium isotopes. Estuaries and Coasts , 34, 256-266.
A. B. Boehm, K. M. Yamahara, D. C. Love, B. M. Peterson, K. McNeill, K. L. Nelson. 2009. Covariation and photoinactivation of traditional and novel indicator organisms and human viruses at a sewage-impacted marine beach. Environmental Science & Technology, 43, 8046- 8052.
S. P. Walters, K. M. Yamahara, A. B Boehm. 2009. Persistence of nucleic acid markers of health-relevant organisms in seawater microcosms: Implications for their use in assessing risk in recreational waters. Water Research, 43, 4929-4939.
K. M. Yamahara, S. P. Walters, and A. B. Boehm. 2009. Growth of enterococci in unaltered, unseeded beach sands subjected to tidal wetting. Applied and Environmental Microbiology, 75, 1517-1524
N. R. De Sieyes, K. M. Yamahara, B. A. Layton, E. H. Joyce, A. B. Boehm. 2008. Submarine discharge of nutrient enriched fresh groundwater at Stinson Beach, California is enhanced during neap tides. Limnology and Oceanography, 53, 1434-1445.
K. M. Yamahara, B. A. Layton, A. E. Santoro, A. B. Boehm. 2007. Beach sands along the California coast are diffuse sources of fecal bacteria to coastal waters. Environmental Science & Technology, 41, 4515-4521.