Estimating Daily Inundation Probability Using Remote Sensing, Riverine Flood, and Storm Surge Models: A Case of Hurricane Harvey

被引:7
|
作者
Liang, Jiayong [1 ]
Liu, Desheng [2 ]
机构
[1] Cloud St, Brooklyn, NY 11217 USA
[2] Ohio State Univ, Dept Geog, Columbus, OH 43210 USA
基金
美国国家科学基金会;
关键词
fusion; inundation probability; remote sensing; Hurricane Harvey; NDWI; ADCIRC; LAND-COVER DATABASE; UNITED-STATES; CLIMATE-CHANGE; SURFACE-WATER; DELINEATION; HAZARD; INDEX; LIFE;
D O I
10.3390/rs12091495
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Heavy precipitation and storm surges often co-occur and compound together to form sudden and severe flooding events. However, we lack comprehensive observational tools with high temporal and spatial resolution to capture these fast-evolving hazards. Remotely sensed images provide extensive spatial coverage, but they may be limited by adverse weather conditions or platform revisiting schedule. River gauges could provide frequent water height measurement but they are sparsely distributed. Riverine flood and storm surge models, depending on input data quality and calibration process, have various uncertainties. These lead to inevitable temporal and spatial gaps in monitoring inundation dynamics. To fill in the observation gaps, this paper proposes a probabilistic method to estimate daily inundation probability by combining the information from multiple sources, including satellite remote sensing, riverine flood depth, storm surge height, and land cover. Each data source is regarded as a spatial evidence layer, and the weight of evidence is calculated by assessing the association between the evidence presence and inundation occurrence. Within a Bayesian model, the fusion results are daily inundation probability whenever at least one data source is available. The proposed method is applied to estimate daily inundation in Harris, Texas, impacted by Hurricane Harvey. The results agree with the reference water extent, high water mark, and extracted tweet locations. This method could help to further understand flooding as an evolving time-space process and support response and mitigation decisions.
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页数:25
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