7/31/2023 0 Comments Houston texas flood maps![]() With continued development in the area, that is, more concrete and less absorbent ground soil, flood control officials are expecting just about everything to change. I certainly immediately felt that this was information that's going to get a lot of scrutiny, get a lot of attention, and not just be a mundane government study that was released," he said. My qualitative assessment is that is probably more than we've seen in other parts of the country. His team is responsible for putting out Atlas 14, and he too says the new data could be a wake-up call. Mark Glaudemans is director of the National Water Center Geo-intelligence Division. Essentially what Atlas 14 says is Houston can expect rain more frequently. The key takeaway from the latest Atlas 14 is, in the Houston area, a rainstorm that had a 1 in 100 chance of occurring in a given year now has a 1 in 25 chance of happening. "I remember when the first review draft was made available and we looked at it and I did say a bad word," he said.Ĭourtesy of NOAA Graphic of Texas shows the updated rainfall values in inches that define certain extreme events, such as the 100-year storm. In September NOAA released the latest volume of Atlas 14, a rainfall study which predicts the frequency of rainfall for an area.Īs Matt Zeve says, the results for Harris County were staggering. Once flood control officials have an accurate picture of the ground, they’ll have to put that together with data on what’s coming from the sky. "It's an incredible amount of effort, and folks don't like to hear how much work it is, but all it takes is just, sit, follow an engineer who's working on one of these for a week and see what he or she is doing and the amount of time it takes and the amount of checking we have to do because what we put out to the public has to be as high quality as possible and then you'll get an understanding of how long this process takes," Zeve said. ![]() "The first step is understanding that topographic data, and then going out and we do actual real live, with people, surveying on all the bridges over all the channels that we model," Zeve said.Įngineers must then put surveying and LIDAR data together, readying it for modelling with rainfall predictions. Zeve says he doesn't expect the new maps to be done until 2023. The LIDAR data is not the only part of the mapping effort that will take a while. Matt Zeve, deputy executive director at Harris County Flood Control District says the data gathered from the LIDAR scans will take the rest of the year to process and make usable. At the beginning of this year, planes equipped with LIDAR flew over the entirety of Harris County, taking in high-resolution topographic data of the area.
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