In San Francisco Bay, salt ponds created more than a century ago are reverting to marshland. Along the New York and New Jersey coasts, beaches ravaged by Superstorm Sandy underwent extensive restoration. In Alabama, a rebuilt spit of land is shielding a historic town and providing wildlife habitat.<\/p>\n
Coastal communities nationwide are ramping up efforts to fend off rising seas, higher tides and stronger storm surges that are chewing away at coastlines, pushing saltwater farther inland and threatening ecosystems and communities.<\/p>\n
The need for coastal restoration has been in the spotlight this month after Louisiana officials canceled<\/a> a $3 billion project because of objections from the fishing industry and concerns about rising costs. The Mid-Barataria project was projected to rebuild more than 20 square miles (32 square kilometers) of land over about 50 years by diverting sediment-laden water from the Mississippi River. <\/p>\n But work continues on many other projects in Louisiana and around the country, including barrier islands, saltwater marshes, shellfish reefs and other natural features that provided protection before they were destroyed or degraded by development. Communities are also building flood walls, berms and levees to protect areas that lack adequate natural protection.<\/p>\n The work has become more urgent as climate change causes more intense and destructive storms and leads to sea-level rise that puts hundreds of communities and tens of millions of people at risk, scientists say.<\/p>\n \u201cThe sooner we can make these coastlines more resilient the better,\u201d said Doug George, a geological oceanographer at the National Oceanic and Atmospheric Administration. <\/p>\n In the U.S., perhaps nowhere is more vulnerable than the hurricane-prone Gulf Coast. Louisiana alone has lost more than 2,000 square miles (5,180 square kilometers) of coastline \u2014 more than any other state \u2014 over the past century, according to the U.S. Geological Survey<\/a>.<\/p>\n Historically, sediment deposited by the Mississippi and other rivers rebuilt land and nourished shore-buffering marshes. But that function was disrupted by the construction of channels and levees, along with other development. <\/p>\n The dangers were magnified in 2005 when Hurricane Katrina breached flood walls and levees, submerging 80% of New Orleans and killing almost 1,400 people \u2014 followed closely by Hurricane Rita.<\/p>\n Afterward, the state formed the Coastal Protection and Restoration Authority to lessen risks from storm surges and stem land loss.<\/p>\n Most of the almost $18 billion spent in the past 20 years was to shore up levees, flood walls and other structures, the authority said. <\/p>\n Dozens of other projects are completed, planned or underway, including rebuilding marshes and other habitat with sediment dredged from waterways and restoring river flow to areas that have lacked it for years.<\/p>\n On Louisiana\u2019s Chandeleur Islands, a barrier island chain, the state will pump in sand to help rebuild them, which will dampen storm surges and benefit sea turtles and other wildlife, said Katie Freer-Leonards, who leads development of the state\u2019s 2029 coastal master plan.<\/p>\n The authority is digging a channel to allow water and sediment from the Mississippi River to flow into part of Maurepas Swamp,<\/a> a roughly 218-square-mile forested wetland northwest of New Orleans that has been \u201cdying for over a century\u201d because of levees, project manager Brad Miller said.<\/p>\n Sediment dredged from elsewhere also has been pumped into thousands of acres of sinking marshes to nourish them and raise their levels.<\/p>\n The same is happening in other states.<\/p>\n In Bayou La Batre, Alabama \u2014 a fishing village built in the late 1700s \u2014 The Nature Conservancy built breakwaters offshore, then pumped in sediment and built ridges, now covered with vegetation. That created a \u201cspeed bump\u201d that has helped protect the town from erosion, said Judy Haner, the Alabama Nature Conservancy\u2019s coastal programs director.<\/p>\n The conservancy and others also have been creating miles of oyster reefs, and are acquiring tracts of land away from the coast to allow habitats to move as seawater encroaches.<\/p>\n Such efforts won’t prevent all land losses, but in Louisiana, \u201ccumulatively, they could make a big difference,” said Denise Reed, a research scientist who is working on Louisiana’s coastal master plan. \u201cIt could buy us some time.\u201d<\/p>\n On the West Coast, communities vulnerable to sea-level rise also could see more flooding from increasingly intense atmospheric rivers<\/a>, which carry water vapor from the ocean and dump huge amounts of rain in a short period of time.<\/p>\n So tidal marshes and estuaries drained for agriculture and industry are being restored along the entire coast, both for habitat and coastal protection.<\/p>\n Habitat restoration, not climate change, was the primary consideration when planning began about 20 years ago to restore marshland along the south end of San Francisco Bay, destroyed when ponds were created to harvest sea salt.<\/p>\n But as sediment naturally fills in ponds and marsh plants return, \u201cwe’re realizing that … marshes absorb wave energy, storm surge and the force of high tides,\u201d said Dave Halsing, executive project manager at the California State Coastal Conservancy.<\/p>\n That helps protect whatever is behind them, including sea walls and land that otherwise could be inundated or washed away, including some of California’s most expensive real estate, near Silicon Valley.<\/p>\n Projects also are underway along Alaska\u2019s coast and in Hawaii, where native residents are rebuilding ancient rocky enclosures originally intended to trap fish, but which also protect against storm surge. <\/p>\n Thirteen years after Superstorm Sandy swamped the Atlantic coast, communities still are restoring natural buffers and building other protective structures.<\/p>\n Sandy began as a fairly routine hurricane in the fall of 2012 before merging with other storms, stretching for a record 1,000 miles and pushing enormous amounts of ocean water into coastal communities.<\/p>\n But the threat of future storm surges could be even greater because sea levels<\/a> in some areas could rise as much as three feet within 50 years, said Donald E. Cresitello, a coastal engineer and senior coastal planner for the U.S. Army Corps of Engineers.<\/p>\n The Corps rebuilt beaches, dunes and human-made structures from Massachusetts to Virginia and now is turning to areas farther inland that are increasingly vulnerable to more powerful storm surges, Cresitello said.<\/p>\n \u201cIf there\u2019s a river coming to the coast, that storm surge has the potential to just ride up that river,” depending on the storm, he said.<\/p>\n A \u201cphenomenal amount\u201d of the U.S. population lives and works along its coasts, so protecting those areas is important to the U.S. economy, said George, the NOAA scientist. But it is also important to preserve generations of culture, he said. <\/p>\n \u201cWhen you think about why people should care … it\u2019s a whole way of life,\u201d George said.<\/p>\n ___<\/p>\n Associated Press Video Journalist Stephen Smith contributed to this report.<\/p>\n ___<\/p>\n The Associated Press\u2019 climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP\u2019s standards<\/a> for working with philanthropies, a list of supporters and funded coverage areas at AP.org<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"In San Francisco Bay, salt ponds created more than a century ago are reverting to marshland. Along the…\n","protected":false},"author":2,"featured_media":91477,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[62419,1147,966,1685,4253,37301,192,793,79,795,1681,42628],"class_list":{"0":"post-91476","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-environment","8":"tag-62419","9":"tag-animals","10":"tag-article","11":"tag-climate-and-environment","12":"tag-climate-change","13":"tag-coastlines-and-beaches","14":"tag-environment","15":"tag-general-news","16":"tag-science","17":"tag-u-s-news","18":"tag-waterways","19":"tag-wetlands"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/91476","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=91476"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/91476\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/91477"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=91476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=91476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=91476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}