Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR029287 |
Western U.S. Superfloods in the Recent Instrumental Record | |
Emilie Tarouilly; Dongyue Li; Dennis P. Lettenmaier | |
2021-07-16 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | We examine the characteristics of extremely severe and extensive floods across the Western U.S., which we term superfloods. We develop a system to score each day from 1950 to 2010, across the conterminous U.S. west of the Continental Divide, according to the severity of flooding and the extent of the area affected on that day. In order to augment the available stream gauge data, we incorporate model output runoff from the Variable Infiltration Capacity (VIC) model aggregated to the HUC-8 basin level. The superfloods we identify include well-known events such as the Christmas floods of December 1964. Once the superfloods are identified, we use modeled SWE and snowmelt in combination with gridded observed precipitation and air temperature to identify superflood drivers. We find that the superfloods fall into three distinct categories: a) winter events, most of which are associated with Atmospheric Rivers (ARs), many enhanced by rain-on-snow; b) late spring floods associated with snowmelt, including some events with rainfall contributions; and (c) rainfall-driven warm season floods associated with tropical storms (primarily in the Southwest). We find that rainfall is often the primary driver of superfloods, although snowmelt also contributes in rain-snow transition zones. Regardless of superflood characteristics, extreme conditions in combination are a common feature, including combinations of rainfall and snowmelt as well as successive rainstorms. Our results provide a regional view of flood drivers and how they have combined to produce superfloods across the region over our 60-year study period. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/333783 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Emilie Tarouilly,Dongyue Li,Dennis P. Lettenmaier. Western U.S. Superfloods in the Recent Instrumental Record[J]. Water Resources Research,2021. |
APA | Emilie Tarouilly,Dongyue Li,&Dennis P. Lettenmaier.(2021).Western U.S. Superfloods in the Recent Instrumental Record.Water Resources Research. |
MLA | Emilie Tarouilly,et al."Western U.S. Superfloods in the Recent Instrumental Record".Water Resources Research (2021). |
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