Quantify the roles of the different key factors in the Houston flood during Hurricane Harvey

量化飓风哈维期间休斯顿洪水中不同关键因素的作用

• 批准号: 1805584
• 负责人: Huilin Gao
• 金额: $ 15.94万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-06-01 至 2022-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1805584&HistoricalAwards=false
• 关键词: Quantify; roles; different; key; factors

Coastal flooding threatens environmental sustainability globally. Recently, Hurricane Harvey unleashed catastrophic flooding and associated losses on Harris County, Texas. In particular, the area north-west of Houston was overwhelmed by the release of water from the Barker and Addicks Reservoirs. Mitigation of the impacts of coastal urban flooding relies on untangling the hydrological processes under a series of factors - namely, urbanization, weather prediction, and reservoir flow regulation. Therefore, the research goal of this project is to quantify the roles of the different key factors in the Houston area flooding that occurred during Hurricane Harvey. The specific research objectives are: 1) Quantifying the role of urbanization in exacerbating the flooding; 2) Evaluating the skill of precipitation forecasting, and its impact on streamflow prediction; and 3) Investigating the effectiveness of reservoir flow regulation during the event.The research will take advantage of a high-performance hydrological model with a newly implemented reservoir component. The research using this integrated modeling framework will help close existing knowledge gaps, and will improve future decision making under extreme flood events. First, the additional streamflow attributed to urban development during Harvey will be quantified by comparing hydrological model outputs under a series of historical land covers. Second, the performance of the operational precipitation and streamflow forecasts will be evaluated, and their associated uncertainties will be quantified. Third, the reservoir module of the hydrological model will be optimized under various land cover and precipitation forecast scenarios, such that a better understanding about flow regulation under various uncertainties can be gained. Furthermore, the project not only seeksto untangle the complex interactions among urbanization, weather prediction, and reservoir flow regulation, it also seeks solutions amidst combined uncertainties. The research approaches and results are target to not only benefit future decision making in the Houston area, but also to bring insight for mitigating floods in other megacities along the world's coastlines. The educational objective is to enhance environmental sustainability education through involving students at all levels - from K-12 to undergraduate and graduate students. These activities will center on different aspects of Hurricane Harvey, and will engage students according to age and education level.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

沿海洪灾威胁着全球环境的可持续性。最近，飓风哈维给德克萨斯州的哈里斯县带来了灾难性的洪水和相关损失。特别是，休斯顿西北部地区被巴克和阿迪克斯水库释放的水淹没了。缓解沿海城市洪水的影响有赖于在一系列因素下理清水文过程--即城市化、天气预报和水库流量调节。因此，本项目的研究目标是量化不同关键因素在飓风哈维期间发生的休斯顿地区洪灾中的作用。具体的研究目标是：1)量化城市化在加剧洪水中的作用；2)评估降水预报的技术及其对径流预报的影响；3)调查水库调度的有效性。研究将利用一个新实施的水库组件的高性能水文模型。使用这种集成建模框架的研究将有助于缩小现有的知识差距，并将改善未来在极端洪水事件下的决策。首先，将通过比较一系列历史土地覆盖下的水文模型输出来量化哈维期间因城市发展而产生的额外径流。其次，将评估业务降水和径流预报的业绩，并量化与之相关的不确定性。第三，水文模型的水库模块将在不同的土地覆盖和降水预测情景下进行优化，以便更好地了解各种不确定因素下的水流调节。此外，该项目不仅寻求解决城市化、天气预报和水库流量调节之间的复杂相互作用，而且还在组合的不确定因素中寻求解决方案。这些研究方法和结果不仅有利于休斯顿地区未来的决策，也为世界海岸线其他特大城市的洪灾缓解带来了洞察力。教育目标是通过让所有级别的学生--从K-12到本科生和研究生--参与，加强环境可持续发展教育。这些活动将围绕飓风哈维的不同方面，并将根据年龄和教育水平吸引学生。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Evaluating precipitation, streamflow, and inundation forecasting skills during extreme weather events: A case study for an urban watershed

评估极端天气事件期间的降水、径流和洪水预报技能：城市流域的案例研究

• DOI: 10.1016/j.jhydrol.2021.127126
• 发表时间: 2021
• 期刊: Journal of Hydrology
• 影响因子: 6.4
• 作者: Li, Xudong;Rankin, Cheryl;Gangrade, Sudershan;Zhao, Gang;Lander, Kris;Voisin, Nathalie;Shao, Manqing;Morales-Hernández, Mario;Kao, Shih-Chieh;Gao, Huilin
• 通讯作者: Gao, Huilin

Impacts of urbanization, antecedent rainfall event, and cyclone tracks on extreme floods at Houston reservoirs during Hurricane Harvey

• DOI: 10.1088/1748-9326/abc4ff
• 发表时间: 2019-12
• 期刊: Environmental Research Letters
• 影响因子: 6.7
• 作者: Xudong Li;Gang Zhao;J. Nielsen‐Gammon;Joel C. Salazar;M. Wigmosta;Ningning Sun;D. Judi;Huilin Gao-Hu

Quantifying the effects of urbanization on floods in a changing environment to promote water security — A case study of two adjacent basins in Texas

• DOI: 10.1016/j.jhydrol.2020.125154
• 发表时间: 2020-10
• 期刊: Journal of Hydrology
• 影响因子: 6.4
• 作者: M. Shao;Gang Zhao;S. Kao;L. Cuo;C. Rankin;Huilin Gao