Siavash Beik, principal engineer for Christopher B. Burke Engineering, said these maps are often made by calculating three variables: rainfall, topography, and hydraulic analysis, which evaluates the capacity of a stream or other water body. In recent years, the mapping program's budget has been a couple of a million dollars, and recent severe events have set the agency even farther back. Then the pandemic came. David Johnson, an assistant professor of political science and industrial engineering at Purdue University, said this is part of the reason why updating floodplain maps can fall a few years — or decades — behind schedule.
So it's just a snapshot of risk at the time the study was done, but it's not accounting for climate change or further urban development. Climate change analyses are increasingly predicting that flooding will become a major concern for American cities. And those are the times of year where we typically have our highest flows anyway. Aside from applying global climate models, the First Street Foundation's methodology also takes into account impermeable surfaces that play a role in city flooding.
The model also fills in some gaps of FEMA mapping, compiling data from regions that have not previously had flood modeling or data. Beik said the foundation's methodology is "excellent" for gaining greater understanding on just how many properties are likely in a flood zone. He said he very much supports this type of calculation for seeing the larger picture on a national, state and even ZIP-code level.
However, Johnson said, the foundation did make some "simplifying assumptions" he believes might affect the reliability of the data. For the large part, Indiana's floodplain maps are in better shape than those in many other states, Beik said.
While he acknowledges some of them are as much as 20 years old, they have all been digitized and are accessible online. Marion County's floodplain maps were last updated in , a spokesperson for the Department of Natural Resources said.
All that rain came from two large storm complexes combined with northwest winds with a fair amount of wind shear, Koch said. By Saturday afternoon, the storms weakened and moved out of the area.
The rest of the weekend will have small chances for some additional scattered showers. The flooding risk was also expected to abate, with the main concern being if one of those scattered storms hits one of the areas that already has had a lot of rain, Koch said. Contact IndyStar reporter Shari Rudavsky at shari. While Indiana will always be at risk of flooding, modern communication systems make it much easier to give advanced warning to people in potentially afflicted areas, resulting in enhanced preparation and decreased casualties.
The National Weather Service tracks the measured precipitation and the levels of hundreds of river gauges across the Ohio River Basin to provide accurate forecasting models and advanced warning for potential floods NWS, Still, anyone who lives in or near the flood plains of a major creek or river should be aware of the possible dangers associated with flooding and take the necessary precautions.
Remember, a year flood could happen in any year. Bybee, H. Germano, N. Lotshaw, T. Schilling, C. Menu Search. Bookstore Sign In. Walnut St. Fig 1. Floodwaters covering a roadway in Franklin, Indiana, in June Heavy rain, enhanced by the remnants of Tropical Storm Gordon, caused severe flooding in parts of Kentucky and Missouri between 07 to 09 September At least 2 people have….
Torrential rain, strong winds, lightning strikes and flash floods hit parts of Indiana and Illinois on Tuesday, 03 April, , closing roads and schools and promoting flood rescues. Local media…. Crews from the U. Geological Survey have been in the field for weeks measuring flooding in the Midwest and in the Mississippi River watershed, and more recently flooding and storm….
Louisiana Governor John Bel Edwards has declared a state of emergency in several parishes across the state as a result of severe weather and flooding.
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