By PATRICK STANFIELD | AP SAN ANTONIO (AP) In the wake of Hurricane Harvey, the Trinity River basin has been hit with its worst drought in more than a century.
As the rains return, the floodwaters have started to rise again.
But this time, they’re headed south toward the Trinity.
In a watershed the size of a football field, the river has already receded by more than 50 feet and its banks are beginning to form a big channel for runoff and evaporation, potentially making the river more vulnerable to future flooding.
For decades, the city has been pumping floodwaters from the Trinity into a channel in the Trinity Valley and out of the San Antonio River Basin, creating a large-scale diversion system that allows it to absorb and release water from one reservoir and then use it to pump into other reservoirs.
That has kept the river from becoming saturated and more vulnerable, even as the area’s population grew.
In addition, the flow of the Trinity has been steadily improving as the river recedes and it starts to catch back up with rainfall.
As water rises from the river, the water is pushed downstream by a network of dams, reservoirs and levees that are designed to keep it from overflowing.
But a new report shows that as the Trinity flows more and more water, the system’s ability to absorb more and larger amounts of water has eroded.
That could lead to a significant increase in the water level of the river as it rushes downstream.
A new report from a team of scientists at the University of Texas at Austin and the Texas A&M University suggests the system is now becoming less and less effective at holding back water.
The study, released Wednesday, found that when the Trinity’s water level falls below a critical level, its banks will begin to form channels for runoff, which will cause the river to rise.
It also said the river is beginning to release its accumulated runoff as it falls and, by extension, increase the amount of runoff it can take out of its banks and into the river.
The authors, including University of Southern California’s John Williams, and the University at Buffalo’s David S. Scharf, called on city officials to implement a system that uses existing reservoirs and allows more water to be released in an effort to improve the Trinity river’s capacity to absorb runoff.
“We don’t have a way to really say how much the Trinity water level will go, but the Trinity will increase its capacity to handle it,” Williams said.
“There are a lot of ways that we can improve the water management in this area.”
The Trinity has an extensive network of reservoirs and other water sources that can absorb runoff, but they are not as well-designed as floodplains, the authors said.
The new study says the Trinity is now so overwhelmed by runoff that the city needs to rethink how it manages that flow.
The Trinity can only absorb so much water from the San Joaquin Valley, which contains about 7 million people.
If the Trinity could handle its own volume of runoff, the study found, the entire river would be able to handle its volume of water, too.
So the Trinity can’t absorb more water than its capacity allows.
It can’t even absorb as much as the average of what is released by the San Francisco Bay area, the report found.
In fact, the researchers said the system could potentially be too overloaded, with the system holding back more water that is already in the system.
“What we are looking at is, if the Trinity were a big river, what would happen if you took a lot more water from it?”
He said it is difficult to say how quickly a flood can occur in the basin.
But, he said, “the more water you take out, the more water can come back.”
The study authors found that during Harvey, more than 1,300 people were killed by floodwaters.
But even before the flood, the area had suffered more than 20 inches of rain, bringing with it flooding, mudslides and landslides.
The report said the flooding has also made the Trinity Basin vulnerable to landslides that can cause catastrophic damage.
The researchers said they were surprised by how much water is being released from the system each day.
The system’s capacity is so severely impaired, the scientists said, that it could take water from several hundred cubic miles to the river and from the rivers bottom into the Trinity and then back into the River.
They also noted that the area is experiencing its first rain event in about 20 years.
The flood is expected to last for the next several weeks, the team said.
Floodwater is seen at the Trinity Aquifer near Dallas, Texas, on Monday, Aug. 30, 2017.
The area has been experiencing flooding in recent days and the Trinity in particular has been getting water back, Scharf and Williams said in a news release.
In the past week, the region has been flooded with rain, and flooding of other areas has become more frequent.
The scientists said