Sensitivity Analysis of Input Data in Surface Water Quality Models


Authors: Martin Manina and Peter Halaj

Volume/Issue: Volume 22: Issue 2

Published online: 01 Nov 2019

Pages: 84–87



The article is focused on analysis of input data impact on outputs of water quality models. The authors examined the impact of roughness coefficient, both boundary and initial conditions setup on changes of outputs generated by HEC-RAS model. Simulation results have shown a various response rate of input data on simulated results. The strong impact shows roughness coefficient setup that through the value of longitudinal dispersion coefficient affects pollution transport process. Changes in boundary conditions have had less influence on outputs. Relatively strong impact shows the setup of initial state of pollution concentration along the reach mainly for the case of low gradient rivers.

Keywords: sensitivity analysis, water quality modelling, open channel, HEC-RAS



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