The water level in Lake Pontchartrain, Louisiana, has dropped to 4 feet, but it is still rising.
That’s according to a new study that said it could be as much as five feet higher.
The study by the U.S. Geological Survey shows the lake rose more than 10 feet between 1900 and 1960, before it began declining.
But that increase is largely because the water level dropped dramatically during the 20th century and is now at a record high.
The new study was published Wednesday in the journal Science Advances.
Scientists believe the lake could be nearly as high as 6 feet above normal levels by 2050.
The water levels were first recorded in 1900 and were then gradually declining until a surge in rainfall during the 1930s brought the lake back up to 4.6 feet.
This surge in water levels led to more erosion of the surface, and then it led to a rebound that has led to the lake’s current rate of decline.
“It’s a real testament to the human ingenuity and our ability to adapt to changing circumstances that we have managed to maintain that lake level over the past 150 years,” said study co-author Steve Gifford, an atmospheric scientist at the University of Florida.
“But it is also a testament to our ability and our resilience to take advantage of what we’ve got.”
Giffords study is based on historical measurements of lake levels and measurements of water-quality measurements made over the last 100 years.
He said it was possible the lake level has been rising more slowly than scientists previously thought.
“We don’t know the answer to that,” Giffors study said.
“However, we do know that there is a significant amount of water in the lake that is not being properly managed and that is causing significant problems for us in the future.”
Scientists believe some of the problem is caused by the rapid expansion of a massive reservoir that sits beneath the lake.
The lake is fed by the Mississippi River, which empties into the Gulf of Mexico and empties out the Mississippi.
That water is stored in deep wells that are surrounded by water.
The deeper the well, the more water it takes to pump it to the surface.
As the well gets deeper, the water starts to flow to the bottom of the lake and eventually, it reaches the bottom, where it is released back into the river.
In the past, scientists have speculated that the river may have increased pressure in the river bed over the centuries, increasing the amount of sediment floating downstream.
But scientists haven’t been able to pinpoint exactly when this occurred.
Giffers study said the river’s capacity to keep up with the current rate was likely the culprit.
“The river is carrying the water to the top of the well,” he said.
That, in turn, creates problems for the bottom and increases the volume of the water being pushed up to the well.
“You’re basically having a big pool of water going up to one of the deepest points of the earth,” he added.
“And the water is going to start to rise.
And it can’t stop rising.
It’s going to come up, it’s going down, and it’s just going to be really nasty.”
Scientists also believe the water table may have begun to rise in the 1940s because of the Hoover Dam.
The dam was constructed to drain the Mississippi and divert the water from the surrounding mountains.
The Hoover Dam also contains the world’s largest concrete structure, the Hoover Aqueduct.
Scientists have speculated it may have pushed up water levels during the dam’s construction.
“There was a lot of concern about the Hoover dam, and there was some discussion about how to fix it,” Gissler said.
The reservoir that fed Lake Pontchrain also sits beneath Lake Pontolivete, and some scientists believe it may also be responsible for the rise in water level.
“When you have an aquifer that’s been in the ground for tens of thousands of years, and you’re pumping water into it, there’s a tendency for it to take up some of that water,” Gedds study said, referring to the amount that would normally flow into the lake once the dam was built.
“If the Hoover dams are not properly managed, then they may cause further degradation of the aquifer.”
A more immediate problem, according to Giff, is that the lake has been growing more slowly over the years.
That has led scientists to suspect it has been losing water as it has drained more, but that doesn’t seem to be the case.
The research was based on the most recent baseline measurements, which were taken from 1958 to 1999.
That baseline is based off of water levels from previous years.
However, Giff said the researchers don’t believe the latest measurements will hold up over the long term.
“This is a really old baseline,” he told ABC News.
“People were just getting their baseline numbers from the 1960s and 1970s and thinking they were the same thing as now.”