Experts Warn Newsom's Coastal Protection Plan Could Harm California Beaches

California Governor Gavin Newsom's administration is implementing measures to protect coastal communities from severe weather, including a "super" El Nino, but experts are raising concerns that these short-term solutions could have detrimental long-term effects on the state's beaches. The plan allows for expedited construction of protective barriers such as seawalls, concrete, and rock barriers.

Jonathan Warrick of the U.S. Geological Survey told the LA Times that while these measures may offer immediate benefits, "long-term, there's a lot of work showing that some of those protection measures can have negative effects." These negative effects can occur both at the protected site and in adjacent areas.

Chad Nelsen, chief executive of the Surfrider Foundation, echoed these concerns, stating that seawalls and rock riprap "ultimately destroy the beach." He explained that these hard structures leave no room for sand, essentially trading the protection of public beaches for private property and infrastructure. "We're making a trade-off between protecting the property and infrastructure for the public's beach," Nelsen said.

The state has seen instances where these protective measures have been necessary. Coastal railroad lines, vital for freight transport, are particularly vulnerable. A project to combat soil erosion near these tracks, which uses rocks to absorb wave energy, has seen sediment loss and parts of the tracks falling into the ocean. The Orange County Transportation Authority has secured over $300 million for rail protection efforts, which include sand placement and engineered interventions like seawalls. Orange County Supervisor Katrina Foley acknowledged that adding rocks is not ideal, as it exacerbates sand erosion, but it is often the only emergency option.

Scientists predict that California could lose up to two-thirds of its beaches by the end of the century if sea levels rise three to six feet, a phenomenon influenced by human-caused global warming, which has already caused about a one-foot increase in sea levels along the coast over the past 125 years. The state has also experienced beach loss due to storm swells and high tides. For example, a beach that existed in Pacifica in the 1970s has already disappeared due to an armored coastline.

While importing sand to replenish beaches is an alternative, it is a costly solution. Nelsen suggested that in some cases, it might eventually be more economical to buy out vulnerable homes rather than continuously investing in beach nourishment projects, which can cost tens of millions of dollars. The tension between immediate coastal protection and the future ecological and recreational impacts of these measures is a growing concern for the state.