Investigation of Trends and Nonstationarity in Hydrologic Variables in the Western Black Sea Basin, Turkey

Zaifoğlu H., Yanmaz A. M. , Baduna Koçyiğit M.

JOURNAL OF HYDROLOGIC ENGINEERING, vol.27, pp.50220071-502200713, 2022 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 27
  • Publication Date: 2022
  • Doi Number: 10.1061/(asce)he.1943-5584.0002182
  • Journal Indexes: Science Citation Index Expanded, Scopus, Aerospace Database, Applied Science & Technology Source, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Computer & Applied Sciences, Environment Index, Geobase, INSPEC, Metadex, Pollution Abstracts, DIALNET, Civil Engineering Abstracts
  • Page Numbers: pp.50220071-502200713
  • Keywords: Flood frequency analysis, Non-stationarity, Western Black Sea Basin, Mann-Kendall, Breakpoint, NONPARAMETRIC-TESTS, MANN-KENDALL, HOMOGENEITY, PRECIPITATION, TEMPERATURE, EXTREMES, SERIES


Redundancy is related to the amount of functionality that the structure can sustain in the worst-case scenario of structural degradation. This paper proposes a widely-applicable concept of redundancy optimization of finite-dimensional structures. The concept is consistent with the robust structural optimization, as well as the quantitative measure of structural redundancy based on the information-gap theory. A derivative-free algorithm is proposed based on the sequential quadratic programming (SQP) method, where we use the finite-difference method with adaptively varying the difference increment. Preliminary numerical experiments show that an optimal solution of the redundancy optimization problem possibly has multiple worst-case scenarios.