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      https://www.ias.ac.in/article/fulltext/sadh/047/0026

    • Keywords

       

      Saturated hydraulic conductivity; Guelph permeameter; ELM; SVM; ANFIS.

    • Abstract

       

      Saturated hydraulic conductivity (Kfs) is the major parameter that affects the movement of water and solutes in soil strata. Although one can estimate the Kfs directly by using various field or laboratory methods, they turn out to be more time-consuming and painstaking while characterizing the spatial variability of Kfs. For this reason, some recent researches employ indirect approaches such as pedotransfer functions (PTF) and surface modeling methods for estimating Kfs of several scales. Pedotransfer functions are often developed by relating theKfs with readily available soil properties such as bulk density, porosity, sand content, silt content, and organic material. The present research explores the suitability of Extreme Learning Machine (ELM) in developing PTF’s for Kfs by using basic soil properties. In-situ field tests and laboratory experiments on collected samples were performed to acquire the datasets necessary for the analysis. Three competitive soft computing approaches, namely the ELM, Support Vector Machine (SVM), and Adaptive Neuro-Fuzzy Inference System (ANFIS) based on Fuzzy C-means Clustering optimized by Genetic Algorithm were exercised for developing the Kfs models. Further, the performance of these approaches in modeling Kfs was evaluated using various statistical mertics.The performance of ELM was found to be good in comparison to the other two models, with sufficiently good NSE values. The ELM model provided Kfs predictions at the Murarji Peth and Punanaka sites with an NSE of 0.90 and 0.83, respectively, while at the Mulegoan site, the ANFIS model was better with R = 0.80 and NSE = 0.64.

    • Author Affiliations

       

      SATISH BHAURAO MORE1 PARESH CHANDRA DEKA2 AMIT PRAKASH PATIL3 SUJAY RAGHAVENDRA NAGANNA4

      1. Department of Civil Engineering, N. K. Orchid College of Engineering & Technology, Solapur 413002, Maharashtra, India
      2. Department of Water Resources and Ocean Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, India
      3. Department of Civil Engineering, Annasaheb Dange College of Engineering and Technology, Ashta 416301, Maharashtra, India
      4. Department of Civil Engineering, Siddaganga Institute of Technology, Tumakuru 572103, Karnataka, India
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