Comparing the performances of multiple rainfall-runoff models of a karst watershed

Authors

  • Md Moudud Hasan Department of Agricultural and Industrial Engineering, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh
  • Md Shariot Ullah Department of Irrigation and Water Management, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
  • Ajoy Kumar Saha Department of Irrigation and Water Management, Sylhet Agricultural University, Sylhet-2202, Bangladesh
  • MG Mostofa Amin Department of Irrigation and Water Management, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

DOI:

https://doi.org/10.3329/aajbb.v6i1.54878

Keywords:

extreme flow; WETSPRO; conceptual model; SWAT

Abstract

Different modeling concepts, a simple (black-box) to a fully distributed modeling (white-box), were used to develop a rainfall-runoff model based on the watershed characteristics to estimate runoff at the watershed outlet. A conceptual (grey-box) model is usually a balance between the black-box and white-box model. In this study, three grey-box models were developed by varying model structures for a karst watershed. The performance of the grey-box models was evaluated and compared with a semi-distributed type (white-box) model that was developed using the Soil and Water Assessment Tool in a previous study. The evaluation was carried out using goodness-of-fit statistics and extreme flow analysis using WETSPRO (Water Engineering Time Series Processing tool). Nash-Sutcliffe efficiencies (NSE) of the grey-box models were from 0.39 to 0.77 in the calibration period and from 0.30 to 0.61 in the validation period. However, the white-box model performed better in terms of NSE but has a higher bias. The best grey-box model performed better in simulating extreme flow, whereas the white-box (SWAT) model adequately simulated daily flows.

Asian Australas. J. Biosci. Biotechnol. 2021, 6 (1), 26-39

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Published

2021-04-30

How to Cite

Hasan, M. M., Ullah, M. S., Saha, A. K., & Amin, M. M. (2021). Comparing the performances of multiple rainfall-runoff models of a karst watershed. Asian-Australasian Journal of Bioscience and Biotechnology, 6(1), 26–39. https://doi.org/10.3329/aajbb.v6i1.54878

Issue

Section

Research Articles