In 1999, Florida began restoring the Kissimmee River, a project that aims to reconnect 44 miles of channel and restore 20,000 acres of wetlands

In 1999, Florida began refilling a flood canal on the Kissimmee River. Officials say it restored nearly 44 miles of channel and 20,000 acres of wetlands. Rivers are meant to bend. For decades, one in Florida couldn't. The Kissimmee River once wound its way for about 103 miles through the middle of the state, until it was straightened into a flood-control canal in the 1960s. Then Florida undertook an unusual restoration project to repair the damage. According to a 2007 paper by Bousquin and colleagues, Phase I of the project, finished in 2001, filled about 7.5 miles of the canal and restored flow to about 15 miles of the old river channel. That's how the plan came together and what scientists have found since.Restoring the Kissimmee meant filling about 22 miles of canal and reconnecting the river's original path. (Wikimedia Commons)Why a straight river was a problemThe canal reduced flooding, but it came with a cost that no one planned for. It cut the river off from its floodplain, destroying wetlands and damaging the ecosystem along the river. Birds, fish, and other wildlife dependent on those wetlands began to decline. The concept of restoring the river first arose in 1976. Congress authorized the project in the Water Resources Development Act of 1992. Then, in 1994, the South Florida Water Management District and the U.S. Army Corps of Engineers agreed to share the cost equally. The aim was to fill in 22 miles of the C-38 canal and reconnect 44 miles of river channel so water could flow more as it did in the past.Fill the canal, and the water finds its old curves. This is what that looks like from above. (Wikimedia Commons)How do you bury a canal?The concept is simple. Crews fill sections of the canal with dirt. This pushes water back into the old meanders of the river, and the water spreads out over the floodplain again. The job is a lot harder than it sounds. Work started in 1999 with the first stretch of backfill and has continued in stages for more than two decades. In July 2021, the U.S. Army Corps of Engineers and the South Florida Water Management District marked the end of construction with a ribbon-cutting. According to the South Florida Water Management District, crews backfilled the full 22 miles of canal. The project restored 44 miles of the historic river channel and more than 40 square miles of river-floodplain ecosystem, which includes about 20,000 acres of drained floodplain turned back into wetlands. Even so, finishing construction was not the end. Scientists are still watching the river to see how it responds.What have scientists learned so far?The 2007 team took measurements beforehand and afterward. They looked at the flow of water, the shape of the channel, oxygen levels, plants, insects, fish, and birds. The paper reported initial responses, comparing what scientists had predicted with what they actually measured.Plants have a story to tell as well. In their 2014 study published in Restoration Ecology, Spencer and Bousquin compared vegetation maps from aerial photographs taken in 1954, 1974, 1996, 2003 and 2008. They focused on a section of the floodplain that was re-wetted between 1999 and 2001. Floodplain coverage with wetland plants in that section ranged from 65% to 83% after rewetting. Before rewetting, that figure was 22% to 37%. Before the canal in 1954, it was 84%. But the recovery was not perfect. Most of the new shrubby wetland was dominated by the invasive Peruvian water primrose, which was not a natural part of the river. So fixing a river can create new problems, and people have to keep monitoring and adjusting.Damage to nature can seem irreversible, but the Kissimmee River restoration provides a more guarded hope. Some of the damage can be mitigated, at least in part, but it takes decades, money, and constant measuring. A restored river does not return to its former state overnight, but evidence so far suggests that giving water room to move can help wetlands come back.The Hindustan Times US Desk brings you the latest news and developments from across the United States. The team covers everything from breaking news and politics to sports, business, entertainment and stories that are trending across the country. Our coverage includes the White House, Congress, US elections, immigration and visa updates, H-1B, green cards, Social Security, education, jobs, layoffs, the economy, technology and major policy changes. We also closely follow stories that matter to Indian and South Asian communities in the US. The desk covers major US sports, including the NFL, NBA, MLB and NHL, along with player news, injuries, schedules, results and major events. Entertainment coverage includes Hollywood, celebrities, television, streaming, music and pop culture. We also report on breaking developments, major incidents, weather, public safety, court cases and other stories making headlines across the country. When a major policy or news development affects people's everyday lives, the team works to explain what happened, what it means and what readers need to know. Alongside breaking news, the US Desk produces explainers and practical stories on topics such as immigration, Social Security, taxes, education, employment and government programmes. The team also works on science, tech, business and AI stories analyzing the impact they may have on people. The team follows developments throughout the day, keeping an eye on official announcements, public records, reliable news sources and what people are talking about across the US.Read More