Abstract
A large proportion of the dams in China are earth-rock dams. Regarding the well-studied loss of life and economic consequences due to dam breaks, this paper introduces the causes and modes of earth-rock dam breaks and the corresponding dam-break losses in terms of the social and environmental aspects. This study formulates the evaluation index system and criteria of earth-rock dam breaks’ impact on society and the environment based on a fuzzy comprehensive evaluation method. The results show that the evaluation grade of the social and environmental impact of the dam break of the Liujiatai Reservoir was “serious”. Therefore, similar dams in China should take corresponding measures in advance to reduce the social and environmental impact of earth-rock dam breaks.
Highlights
Earth-rock dams account for the largest proportion of all kinds of dams in China and are the most common type of dams that experience dam breaks
The results show that the evaluation grade of the social and environmental impact of the dam break of the Liujiatai Reservoir was “serious”, and several suggestions are proposed according to the actual situation
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Summary
Earth-rock dams account for the largest proportion of all kinds of dams in China and are the most common type of dams that experience dam breaks. Based on the introduction of the traditional linear weighted evaluation function, this paper further discusses the fuzzy comprehensive evaluation method [25] in order to provide a more reasonable reference for reservoir risk decision makers. It is a complex and difficult problem to evaluate the social and environmental impacts of earth-rock dam breaks since it involves a wide range of contents that are difficult to define or classify and mostly vague. From the analysis results on the Liujiatai Reservoir, similar dams in China should take corresponding measures in advance to reduce the social and environmental impacts of earth-rock dam breaks
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