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Title: | Adequacy of methodologies for determining SCS / CN in a watershed with characteristics of the Pampa biome |
Other Titles: | Adequação de metodologias para determinação de SCS / CN em uma bacia hidrográfica com características do bioma Pampa |
Keywords: | Effective rainfall Extreme events Hydrological modeling Chuva efetiva Eventos extremos Modelagem hidrológica |
Issue Date: | Aug-2021 |
Publisher: | Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi) |
Citation: | CUNHA, Z. A. da et al. Adequacy of methodologies for determining SCS / CN in a watershed with characteristics of the Pampa biome. Revista Ambiente & Água, Taubaté, v. 16, n. 4, e2715, 2021. DOI: 10.4136/1980-993X. |
Abstract: | The Soil Conservation Service Curve Number Model is a conceptual model intended for estimating effective rainfall (ER). This model is grounded in a parameter - referred to as Curve Number (CN), which is determined from information on the characteristics of the watershed. The Standard Method (M1) for determining the CN is based on soil and land-use tables; however, some authors have proposed alternative methodologies for defining the CN value from monitored rainfall-runoff events, such as those described by Hawkins (1993) (M2), Soulis and Valiantzas (2012) (M3), and Soulis and Valiantzas (2013) (M4). The objective of this study was to evaluate the impact of using these methods for determination of the CN parameter on the estimation of ER, taking as reference forty rainfall-runoff events monitored between 2015 and 2018 in the Cadeia River Watershed, which has characteristics of the Pampa biome. The different methods assessed for definition of the CN parameter resulted in contrasting performances with respect to the estimation of ER for CRW, as the following findings: i) M1 gave ER values with little reliability, mainly due to the classification of antecedent moisture content classes; ii) M3 provided the best results in determining ER, followed by M2; and iii) the ER values estimated according to M4 differed from those observed, mainly for events with lower rainfall depths. |
URI: | http://repositorio.ufla.br/jspui/handle/1/49339 |
Appears in Collections: | DEG - Artigos publicados em periódicos |
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File | Description | Size | Format | |
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ARTIGO_Adequacy of methodologies for determining SCS CN in a watershed with characteristics of the Pampa biome.pdf | 875,74 kB | Adobe PDF | View/Open |
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