Water Management Association of Ohio
The only organization dedicated to all of Ohio's water resources.
Presenter: Bill Kappel Applied Weather Associates, LLC Mr. Kappel is President and Chief Meteorologist of Applied Weather Associates (AWA). Mr. Kappel has been the project manager/technical lead for all aspects of AWA work ranging from PMP development to climate change analyses to risk quantification since joining AWA in 2003. Prior to joining AWA, he served as an on-air meteorologist at various television stations across the country. Mr. Kappel has been a guest instructor at the University of Colorado in Colorado Springs, guest lecturer for the Tailings Center and Mine Water Waste and Closure Course, has published numerous peer reviewed articles on extreme rainfall, and has provided presentations at numerous conferences on various meteorological topics.
Abstract: Probable Maximum Precipitation-20 Years of Updating the HMRs and What to Expect through 2100 Development of statewide and regional Probable Maximum Precipitation (PMP) studies has accelerated over the past several years because of the need to update Hydrometeorological Reports (HMRs), to include recent storm data, to apply current scientific understanding of extreme precipitation, and to provide accurate meteorological information for hydrologic analysis. HMRs currently in use were published from the 1960's to 1990's. Each of these documents cover large regions varying from single states (HMR 59 California) to large regions. At the same time, the need for updates and strain on state dam safety offices continues to increase. To address HMR limitations, many states have chosen to update PMP information through statewide and regional PMP studies. The first statewide PMP update was for the states of Wisconsin and Michigan in 1993. This study provided a significant benefit to the two-state region by improving the PMP development process and including additional storm data. The next statewide PMP update, Nebraska, did not occur until 2008. The Nebraska study updated the PMP storm database and provided significant improvements in the data and methods. The utility of the statewide and regional PMP studies is that PMP are updated for hundreds or thousands of dams at once, thereby saving millions of dollars, improving safety, and helping to alleviate stress on state dam safety offices. Numerous statewide and regional PMP studies have been completed in the last ten years, with several other states currently in progress. The benefit of this work is enormous with improvements continuing to be realized during each study. Going forward, data and information from these PMP studies is being consolidated into an easily accessible user interface that will allow access to PMP results, will provide detailed documentation, and will not have software specific requirements. In addition, evaluations of how climate change may impact PMP development have been considered in many of these studies. This presentation will discuss PMP through time and what to expect going into the future.
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