Two Delta advocacy groups said Tuesday that the Bay Delta Conservation Plan to build water diversion tunnels will worsen environmental problems in San Joaquin Valley and threaten water quality for farmers and residents in the region. The Bay-Delta coalition Restore the Delta along with the national group Food and Water Watch contend the tunnels would mainly serve the largest agricultural concerns, while increasing the contamination of waterways with dangerous levels of Selenium. The groups also charge that large volumes of water delivered through the tunnels will be used for hydraulic fracturing in the Valley’s oil and gas basins. Vic Bedoian reports from Fresno.