Water Science and Engineering 2018, 11(1) 81-87 DOI:   https://doi.org/10.1016/j.wse.2017.07.001  ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
Reservoir staged operation in flood season
Earth dam
Danger degree
Quantitative evaluation
Authors
PubMed

A quantitative model for danger degree evaluation of staged operation of earth dam reservoir in flood season and its application

Chong-xun Mo a,b,c, Gui-yan Mo a,b,c,*, Qing Yang a,b,c, Yu-li Ruan a,b,c, Qing-ling Jiang d, Ju-liang Jin e

a College of Civil and Architectural Engineering, Guangxi University, Nanning 530004, China b Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, China c Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, China d Changjiang Institute of Technology, Wuhan 430212, China e School of Civil Engineering, Hefei University of Technology, Hefei 230009, China

Abstract

Based on the natural disaster risk evaluation mode, a quantitative danger degree evaluation model was developed to evaluate the danger degree of earth dam reservoir staged operation in the flood season. A formula for the overtopping risk rate of the earth dam reservoir staged operation was established, with consideration of the joint effect of flood and wind waves in the flood sub-seasons with the Monte Carlo method, and the integrated overtopping risk rate for the whole flood season was obtained via the total probability approach. A composite normalized function was used to transform the dam overtopping risk rate into the danger degree, on a scale of 0 to 1. Danger degree gradating criteria were divided by four significant characteristic values of the dam overtopping rate, and corresponding guidelines for danger evaluation are explained in detail in this paper. Examples indicated that the dam overtopping danger degree of the Chengbihe Reservoir in China was 0.33 to 0.57, within the range of moderate danger level, and the flood-limiting water level (FLWL) can be adjusted to 185.00 m for the early and main flood seasons, and 185.00 m to 187.50 m for the late flood season. The proposed quantitative model offers a theoretical basis for determination of the value of the danger degree of an earth dam reservoir under normal operation as well as the optimal scheduling scheme for the reservoir in each stage of the flood season.

Keywords Reservoir staged operation in flood season   Earth dam   Danger degree   Quantitative evaluation  
Received 2017-01-20 Revised 2017-07-19 Online: 2018-01-31 
DOI: https://doi.org/10.1016/j.wse.2017.07.001
Fund:

This work was supported by the National Natural Science Foundation of China (Grants No. 51569003 and 51579059), the Natural Science Foundation of Guangxi Province (Grant No. 2017GXNSFAA198361), and the Innovation Project of Guangxi Graduate Education (Grant No. YCSW2017052).

Corresponding Authors: 419465052@qq.com (Gui-yan Mo)
Email: 419465052@qq.com
About author: 419465052@qq.com (Gui-yan Mo)

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