Water Supply (Dec 2021)

Multi-level fuzzy comprehensive evaluation of the influence of reservoir sedimentation based on improved cloud model

  • Mingwang Zhang,
  • Kebin Shi

DOI
https://doi.org/10.2166/ws.2021.190
Journal volume & issue
Vol. 21, no. 8
pp. 4465 – 4480

Abstract

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The extent of reservoir sedimentation is an important index related to the functional operation of reservoirs. Therefore, it is vital to accurately conduct sedimentary assessment. In this paper, the analytic hierarchy process was used to determine subjective weights, gray correlation analysis and entropy weight method were used to determine objective weights. The combination weights obtained using optimized combination weighting method based on genetic algorithm were more suitable for the comprehensive analysis of the impact of reservoir sedimentation. This was then used to constructed a multi-level fuzzy comprehensive evaluation model based on improved cloud model. A reservoir was selected as the study object, and its sedimentation impact level was evaluated: the numerical characteristics of the stratus cloud of the comment on the impact of the reservoir sedimentation were (0.6372, 0.0664, 0.0795). The results showed that the reservoir sedimentation is considered as severe influence, and the sedimentation has become a major problem that needed to be solved urgently. The results of this paper could provide insight for reservoir research domestically and abroad. Furthermore, it could also enable managers to more accurately grasp the severity of reservoir sedimentation. HIGHLIGHTS The combination of the cloud model and genetic algorithm in computing was used to study and evaluate the influence of reservoir sedimentation. The calculation result was proved to be much accurate than that of the traditional method, and is more in line with the actual purpose of the project.; The multi-level fuzzy comprehensive evaluation model was constructed based on the improved cloud model for the sole purpose of analyzing the influence of sedimentation on reservoir function.; The improved combination weighting method based on genetic algorithm was used to solve the combination weight issues.;

Keywords