Safety Assessment Model of Earth-Rock Dam Based on Ideal Point-Cloud Theory

Abstract

Uncertainty is inevitable in the safety monitoring and evaluation process of earth-rock dam. Such uncertainty makes the accurate reflection of the running status of earth-rock dams of traditional safety assessment results impossible. Thus, this study proposed a safety assessment model of earth-rock dams based on the combination weighting method of ideal point and the cloud theory model. The proposed model was used to scientifically solve the uncertainty during the safety assessment of earth-rock dams. Real and reliable weights of indexes were determined using the combination weighting method based on the ideal point. Then, the safety evaluation grade ranges of each evaluation index were divided on the basis of the measured data. These grade ranges were "softened" by combining cloud theory. The proposed safety assessment model was applied to an earth-rock dam in the reservoir of a pumped storage station in Tai'an City, Shandong Province, China. Results demonstrate that: (1) the proposed model can effectively solve fuzzy and random problems during the safety assessment of earth-rock dams, and (2) the results show that the safety of the investigated earth-rock dam is in a normal running state. This outcome reflects the actual conditions of the earth-rock dam. The proposed model provides references in the diagnosis and decision making in the earth-rock dam management department.

Assessment of Regional Water Resource Security: A Case Study from Hebei Province, China

“…Much research has been conducted on water resource safety status analysis and evaluation. In general, following the steps of index screening, weight determination, and comprehensive evaluation, the main research methods include the AHP, the fuzzy comprehensive evaluation method, system dynamics, the Back Propagation (BP) neural network, and the SPA model [15,16]. For instance, Zhang combined the entropy weight method and the SPA model to conduct a comprehensive analysis and evaluation of the water resource safety status in Chongqing, China from 2000 to 2011 to determine the sources of water resource system pressure and propose countermeasures [17].…”