Reconstructing extreme post‐wildfire floods: a comparison of convective and mesoscale events
Reconstructing extreme post‐wildfire floods: a comparison of convective and mesoscale events
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重建极端的野火洪水：对流和中尺度事件的比较
DOI：
10.1002/esp.4194
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发表时间：
2017
影响因子：
3.3
通讯作者：
L. Macdonald
中科院分区：
文献类型：
--
作者：
D. Brogan;P. Nelson;L. Macdonald
在美国西部的大部分地区，野火后的破坏性洪水往往是由局部的、持续时间较短的对流雷暴造成的；然而，人们对持续时间较长、强度较低的中尺度风暴造成的火灾后洪水知之甚少。在这项研究中，我们估计和比较了2012年在科罗拉多前锋山脉中北部15.5 平方公里的斯皮克峡谷盆地发生的高空公园火灾后对流和中尺度洪水的峰值流量。2012年7月6日的对流风暴发生在野火得到控制的几天后。雷达资料显示，总降雨量为20-47 mm，最大降雨强度(50 mm h−1以上)集中在流域严重烧毁的部分地区。2013年9月9日至15日的中尺度风暴产生了220-240 毫米的降雨量，但最大15分钟强度仅为25-32 mm h−1。
In much of western United States destructive floods after wildfire are frequently caused by localized, short‐duration convective thunderstorms; however, little is known about post‐fire flooding from longer‐duration, low‐intensity mesoscale storms. In this study we estimate and compare peak flows from convective and mesoscale floods following the 2012 High Park Fire in the ungaged 15.5 km2 Skin Gulch basin in the northcentral Colorado Front Range. The convective storm on 6 July 2012 came just days after the wildfire was contained. Radar data indicated that the total rainfall was 20–47 mm, and the maximum rainfall intensities (upwards of 50 mm h−1) were concentrated over portions of the watershed that burned at high severity. The mesoscale storm on 9–15 September 2013 produced 220–240 mm of rain but had maximum 15‐min intensities of only 25–32 mm h−1.