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首页> 外文会议>Association of State Dam Safety Officials annual conference >Colorado September Rainfall Analysis: Comparisons to the Calgary 2013 Rainfall and PMP Along the Rocky Mountain Front Range
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Colorado September Rainfall Analysis: Comparisons to the Calgary 2013 Rainfall and PMP Along the Rocky Mountain Front Range

机译：科罗拉多州9月降雨分析：与落基山前山脉卡尔加里2013年降雨和PMP的比较

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摘要

Extreme rainfall during June 2013 in and around Calgary, Alberta caused extensive flooding and damage in the region. Although the combination of meteorological conditions which led to this rainfall were not uncommon, the high levels of atmospheric moisture and total amounts of rain were extremely rare. Several comparable events have been recorded along the eastern slopes of the Rocky Mountains from the United States through Alberta. Notable examples include the June 1975 storm near Waterton Red Rocks, Alberta, and the June 1964 storm at Gibson Dam, Montana. Recently, a storm in September of 2013 occurred over the foothills and Front Range of the Rocky Mountains in Colorado and Southern Wyoming. This rainfall event had similar meteorological and topographical stetting when compared to the Calgary storm a few months earlier, with both events producing extreme rainfall and devastating flooding. Applied Weather Associates (AWA) has analyzed each of these events using our Storm Precipitation Analysis System (SPAS) for use in determining Probable Maximum Precipitation (PMP), which is then used by hydrologists to compute the Probable Maximum Flood (PMF). These and other storms analyzed with SPAS provide high spatial resolution (approximately 1 square kilometer) and high temporal resolution (as frequent as 5 minutes when weather radar data are available) rainfall information for hydrologic model calibrations and hydrologic investigations. This presentation will provide comparisons of the magnitude and spatial extent of these extreme rainfall events, how the rainfall is enhanced by the similar terrain along the eastern foothills of the Rocky Mountains, how they relate to PMP values in regions where similar storms could occur, and lessons learned regarding recognition and real-time monitoring of the meteorological conditions leading up to and during these types of storms.
机译：2013年6月，艾伯塔省卡尔加里及其周边地区的极端降雨造成了该地区的大面积洪灾和破坏。尽管导致这种降雨的气象条件并不罕见，但极高的大气湿度和降雨总量却很少。从美国到艾伯塔省，沿落基山脉的东坡记录了一些类似的事件。著名的例子包括1975年6月在艾伯塔省沃特顿红岩附近的风暴以及1964年6月在蒙大拿州吉布森水坝的风暴。最近，2013年9月，科罗拉多州和怀俄明州南部的落基山麓和山麓地区发生了一场风暴。与几个月前的卡尔加里暴风雨相比，该降雨事件具有类似的气象和地形top缩，这两个事件都产生了极大的降雨和毁灭性的洪水。美国应用天气协会（AWA）已使用我们的风暴降水分析系统（SPAS）分析了这些事件中的每一个，以用于确定可能的最大降水量（PMP），然后水文学家将其用于计算最大可能的洪水量（PMF）。使用SPAS分析的这些和其他风暴提供了较高的空间分辨率（大约1平方公里）和较高的时间分辨率（当有天气雷达数据时，通常为5分钟）用于降雨的水文模型校准和水文调查。本演讲将比较这些极端降雨事件的强度和空间范围，落基山脉东麓的相似地形如何增强降雨，它们与可能发生相似风暴的地区中的PMP值有何关系，以及在识别和实时监控导致此类风暴期间以及在这种风暴期间的气象条件方面吸取的经验教训。

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