Integration of ANFIS with PCA and DWT for daily suspended sediment concentration prediction

  • Nguyen Mai Dang Thuyloi University, 175 Tay Son Street, Dong Da district, Hanoi, Vietnam
  • Duong Tran Anh Ho Chi Minh City University of Technology (HUTECH), 475A Bien Bien Phu street, Binh Thanh District, Ho Chi Minh City, Vietnam
Keywords: machine learning, Schuylkill River, Iowa River, suspended sediment

Abstract

Quantifying sediment load is vital for aquatic and riverine biota and has been the subject of various environmental studies since sediment plays a key role in maintaining ecological integrity, river morphology and agricultural productivity. However, predicting sediment concentration in rivers is difficult because of the non-linear relationships of flow rates, geophysical characteristics and sediment loads. It is thus very important to propose suitable statistical methods which can provide fast, accurate and robust prediction of suspended sediment concentration (SSC) for management guidance. In this study, we developed coupled models of discrete wavelet transform (DWT) with adaptive neuro-fuzzy inference system (ANFIS), named DWT-ANFIS, and principal component analysis (PCA) with ANFIS, named PCA-ANFIS, for SSC time-series modeling. The coupled models and single ANFIS model were trained and tested using long-term daily SSC and river discharge which were measured on the Schuylkill and Iowa Rivers in the United States. The findings showed that the PCA-ANFIS performed better than the single ANFIS and the coupled DWT-ANFIS. Further applications of the PCA-ANFIS should be considered for simulation and prediction of other indicators relating to weather, water resources, and the environment.

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Published
2021-04-29
Section
Research paper