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Article

Effects of Nonhomogeneous Soil Characteristics on the Hydrologic Response: A Case Study

Department of Civil Engineering, Daegu University at 201 Daegude-ro, Gyeongsan 38453, Korea
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Water 2020, 12(9), 2416; https://doi.org/10.3390/w12092416
Received: 18 July 2020 / Revised: 26 August 2020 / Accepted: 26 August 2020 / Published: 28 August 2020
(This article belongs to the Special Issue Modelling Hydrologic Response of Non­-homogeneous Catchments)
This study examined how different nonhomogeneous soil characteristics affected hydrologic responses in rainfall-runoff models. The cell-based FLO-2D and lumped Hydrologic Engineering Center Hydrologic Modeling System (HEC-HMS) were setup. Then, water loss parameters of both the Green-Ampt infiltration approach and curve number method were prescribed and applied in three different ways: (i) a separate value for each cell (mosaic; (ii) a representative as a most frequent occurring value for a large area (predominant); (iii) and a representative as an arithmetic mean value for a watershed (arithmetic mean). The spatial variability of nonhomogeneous catchment parameters was disregarded in lumped models, while each cell had distinct surface parameters in the distributed models. This study shows that the hydrologic response was meaningfully different in different representations. For the study site, the mosaic method was recommended for distributed models, and arithmetic mean was recommended for lumped models. View Full-Text
Keywords: hydrologic modeling; nonhomogeneous catchments; flood; aggregation; uncertainty; parameters hydrologic modeling; nonhomogeneous catchments; flood; aggregation; uncertainty; parameters
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MDPI and ACS Style

Hwang, J.; Lee, H.; Lee, K. Effects of Nonhomogeneous Soil Characteristics on the Hydrologic Response: A Case Study. Water 2020, 12, 2416. https://doi.org/10.3390/w12092416

AMA Style

Hwang J, Lee H, Lee K. Effects of Nonhomogeneous Soil Characteristics on the Hydrologic Response: A Case Study. Water. 2020; 12(9):2416. https://doi.org/10.3390/w12092416

Chicago/Turabian Style

Hwang, JiHyeong; Lee, HyungKeun; Lee, Khil. 2020. "Effects of Nonhomogeneous Soil Characteristics on the Hydrologic Response: A Case Study" Water 12, no. 9: 2416. https://doi.org/10.3390/w12092416

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