River suspended sediment estimation by climatic variables implication: Comparative study among soft computing techniques

Authors:
Ozgur Kisi;Jalal Shiri
Affiliations:
Faculty of Architecture and Engineering, Civil Engineering Department, University of Canik Basari, Samsun, Turkey;Faculty of Agriculture, Water Engineering Department, University of Tabriz, Tabriz, Iran
Venue:
Computers & Geosciences
Year:
2012

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Abstract

Estimating sediment volume carried by a river is an important issue in water resources engineering. This paper compares the accuracy of three different soft computing methods, Artificial Neural Networks (ANNs), Adaptive Neuro-Fuzzy Inference System (ANFIS), and Gene Expression Programming (GEP), in estimating daily suspended sediment concentration on rivers by using hydro-meteorological data. The daily rainfall, streamflow and suspended sediment concentration data from Eel River near Dos Rios, at California, USA are used as a case study. The comparison results indicate that the GEP model performs better than the other models in daily suspended sediment concentration estimation for the particular data sets used in this study. Levenberg-Marquardt, conjugate gradient and gradient descent training algorithms were used for the ANN models. Out of three algorithms, the Conjugate gradient algorithm was found to be better than the others.