Aerial photogrammetry to characterise and numerically model an ice jam model in Southern Quebec

IF 2.6 4区环境科学与生态学 Q2 WATER RESOURCES

Hydrology Research Pub Date : 2023-10-10 DOI:10.2166/nh.2023.010

Jason Duguay, Karl-Erich Lindenschmidt, Mélanie Trudel, Antoine Pruneau

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引用次数: 0

Abstract

Abstract Collecting data on the dynamic breakup of a river's ice cover is a notoriously difficult task. However, such data are necessary to reconstruct the events leading to the formation of ice jams and calibrate numerical ice jam models. Photogrammetry using images from remotely piloted aircraft (RPA) is a cost-effective and rapid technique to produce large-scale orthomosaics and digital elevation maps (DEMs) of an ice jam. Herein, we apply RPA photogrammetry to document an ice jam that formed on a river in southern Quebec in the winter of 2022. Composite orthomosaics of the 2-km ice jam provided evidence of overbanking flow, hinge cracks near the banks and lengthy longitudinal stress cracks in the ice jam caused by sagging as the flow abated. DEMs helped identify zones where the ice rubble was grounded to the bed, thus allowing ice jam thickness estimates to be made in these locations. The datasets were then used to calibrate a one-dimensional numerical model of the ice jam. The model will be used in subsequent work to assess the risk of ice interacting with the superstructure of a low-level bridge in the reach and assess the likelihood of ice jam flooding of nearby residences.

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航空摄影测量表征和数值模拟在魁北克南部的冰塞模型

收集河流冰盖动态破裂的数据是一项非常困难的任务。然而，这些数据对于重建导致冰塞形成的事件和校准数值冰塞模型是必要的。利用遥控飞机(RPA)的图像进行摄影测量是一种经济、快速的技术，可用于制作冰障的大尺度正形图和数字高程图。在这里，我们应用RPA摄影测量法记录了2022年冬天魁北克南部一条河流上形成的冰塞。2公里冰塞的复合正形图提供了水流过倾的证据，河岸附近的铰链裂缝，以及随着水流减弱而下沉造成的长纵向应力裂缝。dem帮助确定了冰碎石与床接触的区域，从而可以对这些地点的冰塞厚度进行估计。这些数据集随后被用来校准一个一维的冰塞数值模型。该模型将在随后的工作中用于评估冰与河段低空桥梁上部结构相互作用的风险，并评估附近居民发生冰塞洪水的可能性。

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来源期刊

Hydrology Research WATER RESOURCES-

CiteScore

5.00

自引率

7.40%

发文量

审稿时长

3.8 months

期刊介绍： Hydrology Research provides international coverage on all aspects of hydrology in its widest sense, and welcomes the submission of papers from across the subject. While emphasis is placed on studies of the hydrological cycle, the Journal also covers the physics and chemistry of water. Hydrology Research is intended to be a link between basic hydrological research and the practical application of scientific results within the broad field of water management.