The breaching mechanism of moraine dams with buried ice: A Review

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2024-09-06 DOI:10.1016/j.coldregions.2024.104315

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引用次数: 0

Abstract

Moraine dams formed by the accumulation of loose glacial materials, typically exhibit poor consolidation properties and complex structure characteristics (especially with buried ice) which make them susceptible to failure. Influenced by global climate warming, the risk of moraine dam breaching is further exacerbated. This article summarizes the breaching modes, breaching mechanisms, and breaching numerical models of moraine dams, and analyzes several deficiencies: 1) The accuracy of long-term monitoring of moraine dams is relatively low, the dynamic monitoring for individual dam and its environment is insufficient; 2) Systematic research on how buried ice affects dam breaching is lacking, and a significant gap remains in the study of combined multiple breaching modes of moraine dams; 3) The predictive results of moraine dam breaching parameter models are quite unreliable, and physically-based mathematical models have not consider the influence of buried ice. Based on this, the article puts forward the following recommendations: 1) Enhance the understanding of climate change impacts on moraine dam breaching through long-term dynamic monitoring of moraine dams; 2) Focus on the erosion characteristics of materials, study the breaching process and mechanisms of ice-rich moraine dams under various breaching modes; 3) Reveal the response mechanism of moraine dams to temperature variations using numerical simulation techniques that couple thermal-stress modules and consider the phase change of ice, further revealing the breaching mechanisms of moraine dams containing buried ice.

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埋冰碛坝的溃坝机制：综述

冰碛大坝由松散的冰川物质堆积而成，通常具有较差的固结性能和复杂的结构特征（尤其是埋冰），因此很容易发生溃坝。受全球气候变暖的影响，冰碛溃坝的风险进一步加剧。本文总结了冰碛坝的溃坝模式、溃坝机理和溃坝数值模型，并分析了几个不足之处：1）对冰碛坝的长期监测精度较低，对单个坝体及其环境的动态监测不足；2）缺乏对埋冰如何影响溃坝的系统研究，对冰碛坝多种溃坝模式的综合研究仍有很大差距；3）冰碛坝溃坝参数模型的预测结果很不可靠，基于物理的数学模型没有考虑埋冰的影响。基于此，文章提出以下建议：1）通过对冰碛坝的长期动态监测，加强对气候变化对冰碛坝冲毁影响的认识；2）关注材料的侵蚀特性，研究富冰冰碛坝在各种冲毁模式下的冲毁过程和机理；3）利用热应力耦合模块和考虑冰的相变的数值模拟技术，揭示冰碛坝对温度变化的响应机理，进一步揭示埋冰冰碛坝的冲毁机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.