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- W2113932381 abstract "Accurate Suspended Sediment Load (SSL) estimation is very important for water resources quantity and quality studies. In this regard, Sediment Rating Curve (SRC) is a common regression model in predicting SSL of discharge. Studies in this field have shown that the data log-transformation in SRC model causing a bias which underestimates SSL prediction. In this study, using data from the daily flow discharge and suspended sediment discharge of Karaj Dam watershed at Siera station, a 30-year period (1981 to 2011), SRC equation derived, and then, using meta-heuristic algorithms (genetic algorithm and particle swarm optimization algorithm) it was calibrated again. Before modeling to increase the generalization power of the models, using fuzzy clustering method, the data were clustered and then by doing data sampling, they were classified into two homogeneous groups (calibration and test data set). The results show that meta-heuristic algorithms are appropriate methods for optimizing coefficients of SRC model and their results are much more favorable than those of the conventional SRC models or SRC models corrected by correction factors. In this relation, the sediment rating curve models calibrated with meta-heuristic algorithms, by reducing the RMSE of the test data set of 3718.87 ton/day (in the initial SRC model) to 2615/119 ton/day (in the calibrated models by meta-heuristic algorithms) increased the accuracy of suspended sediment load estimation at a rate of 1103.68 ton/day. However, the SRC model corrected by FAO factor decreased the efficiency of initial SRC model by increasing the RMSE of the test data set to 4128/73 ton/day. Using meta-heuristic algorithms in calibrating SRC models also prevents data log-transformation and use of correction factors and increases the accuracy of results." @default.
- W2113932381 created "2016-06-24" @default.
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- W2113932381 date "2014-10-20" @default.
- W2113932381 modified "2023-09-26" @default.
- W2113932381 title "Daily Suspended Sediment Load Estimation by Meta-heuristic Optimization Approaches and Fuzzy-C-means Clustering Method (Case Study: Siera Hydrometry Station - Karaj River)" @default.
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- W2113932381 doi "https://doi.org/10.17485/ijst/2014/v7i10/51872" @default.
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