Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
Preprints
Preprints
https://doi.org/10.5194/hess-2019-682
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2019-682
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Preprints
 
28 Jan 2020
28 Jan 2020
Status: this preprint was under review for the journal HESS but the revision was not accepted.

Evaluation of Soil Water Index of distributed Tank Model in a small basin with field data

Sofia Melo Vasconcellos1, Masato Kobiyama1, and Aline de Almeida Mota2 Sofia Melo Vasconcellos et al.
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  • 1Institute of Hydraulic Researches, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
  • 2Department of Environmental and Sanitary Engineering, Federal University of Fronteira Sul, Chapecó, Brazil
Received: 18 Dec 2019 – Discussion started: 28 Jan 2020

Abstract. The objective of the present study was to determine the spatial behaviour of the Soil Water Index (SWI) by applying a distributed version of the Tank Model (D-Tank Model) to the Araponga river basin (5.26 ha) in southern Brazil and to verify its reliability through the comparison to soil moisture estimated with the measured water-tension values and the water retention curve. The study area has a monitoring system for rainfall, discharge (5-min interval), and soil-water tension (10-min interval). The simulation results showed that the D-Tank Model has a reliable performance. The correlation between SWI and HAND was reasonable (r = 0.6) meanwhile that between SWI and the Topographic Wetness Index was high (r = 0.88). The comparison between the spatially distributed values of the SWI and soil moisture confirmed the high potential of the SWI derived from the D-Tank Model to be applied for predictions related to hydrological and environmental sciences.

How to cite. Vasconcellos, S. M., Kobiyama, M., and de Almeida Mota, A.: Evaluation of Soil Water Index of distributed Tank Model in a small basin with field data, Hydrol. Earth Syst. Sci. Discuss. [preprint], https://doi.org/10.5194/hess-2019-682, 2020.

Sofia Melo Vasconcellos et al.

 
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Sofia Melo Vasconcellos et al.

Sofia Melo Vasconcellos et al.

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Short summary
The objective of the present study was to determine the spatial behaviour of the Soil Water Index (SWI) by applying a distributed version of the Tank Model (D-Tank Model) to verify its reliability through the comparison to soil moisture estimated with the measured water-tension values and the water retention curve. The comparison between the spatially distributed values of the SWI and soil moisture confirmed the high potential of the SWI for predictions related to hydrological sciences.
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