Takagi-Sugeno fuzzy approach in rock armored slopes for 2% wave runup estimation

Tarkan Erdik*, Mehmet Emin Savci

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Runup level exceeded by 2% of the incident waves is a key parameter in rough rock armored slopes design. From the literature survey, it is seen that the two most important factors influencing runup phenomena on rock armored slopes are structure permeability (SP) and surf similarity parameter (SSP). Since the relationships between wave runup and these parameters are complex, vague and uncertain in nature, it is quite difficult to adequately examine wave runup by conventional regressional approaches. Here, an attempt is made to construct various Takagi-Sugeno [TS, 1985] fuzzy models for predicting the 2% wave runup on rock armored slopes. The developed TS fuzzy model with two inputs namely SP and SSP yielded the best result out of all constructed models and is proposed in this study. The presented model is validated by comparison with widely used empirical model of Meer and Stam [MS, 1992], recommended by the U.S. Army Corps of Engineers [2002], using the experimental data-sets of MS. The verification process is obtained through scatter diagrams and two numerical error criterias. It was found that the TS model produce better accuracy in performance than the MS's empirical model.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)161-177
Sayfa sayısı17
DergiCoastal Engineering Journal
Basın numarası2
Yayın durumuYayınlandı - Haz 2008


This research was supported by the Turkish Science and Research Foundation (TUBITAK) under grant number 105M261. The financial support is gratefully acknowledged. Björn Van de Walle is highly appreciated for his helpful suggestions. Special thanks to Jentsje Van der Meer for so kindly providing his original irregular wave run-up data. The authors are especially indebted to Satoshi Takewaka and the journal reviewers for their useful suggestions and comments.

FinansörlerFinansör numarası
Turkish Science and Research Foundation

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