Land Use Effect on the CN Model Parameters in a Tropical Dry Environment

Andrade, Eunice Maia de; Neto, J. R. A.; Guerreiro, Maria João; Santos, Júlio César Neves dos; Palácio, Helba Araújo de Queiroz

doi:10.1007/s11269-017-1732-4

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…Our findings showed a good model performance with values of R 2 , NSE, and PBIAS of 0.71, 0.66, and -2.02, respectively. These results highlight the importance of future investigations about the use of the CN method in tropical watersheds, such as that developed in the present study and by Andrade et al (2017), Oliveira et al (2016), and Sartori, Hawkins and Genovez (2011).…”

Section: Cn Valuessupporting

confidence: 65%

Initial abstraction ratio and Curve Number estimation using rainfall and runoff data from a tropical watershed

Valle

Rodrigues

Oliveira

2019

RBRH

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The Curve Number (CN) method is extensively used for predict surface runoff from storm events. However, remain some uncertainties in the method, such as in the use of an initial abstraction (λ) standard value of 0.2 and on the choice of the most suitable CN values. Here, we compute λ and CN values using rainfall and runoff data to a rural basin located in Midwestern Brazil. We used 30 observed rainfall-runoff events with rainfall depth greater than 25 mm to derive associated CN values using five statistical methods. We noted λ values ranging from 0.005 to 0.455, with a median of 0.045, suggesting the use of λ = 0.05 instead of 0.2. We found a S0.2 to S0.05 conversion factor of 2.865. We also found negative values of Nash-Sutcliffe Efficiency (to the estimated and observed runoff). Therefore, our findings indicated that the CN method was not suitable to estimate runoff in the studied basin. This poor performance suggests that the runoff mechanisms in the studied area are dominated by subsurface stormflow.

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Section: Cn Valuessupporting

confidence: 65%

Initial abstraction ratio and Curve Number estimation using rainfall and runoff data from a tropical watershed

Valle

Rodrigues

Oliveira

2019

RBRH

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“…Nagarajan and Basil (2014) determined runoff estimation with the effect of land use change and different temporal variations to assess the utility of high spatial resolution satellite imagery and to validate the peak rate of runoff estimated by a spatially distributed hydrologic simulation model, the results were compared with real-time conventional ground truth data. Andrade et al (2017) analyzed the impact of land use changes on the curve number (CN) model in a tropical semi-arid environment, in two catchments, located in Brazil, of native dry tropical forest and thinned dry tropical forest land use from 2009 to 2012. Menberu et al (2015) analyzed 59 rainfall-runoff events from two peatdominated watersheds in Finland (Marjasuo and Röyvänsuo) and one in Norway (Grualia), aiming to verify the natural resources conservation service (NRCS) curve number method in peat soils.…”

Section: Topic 9 -Land Use and Occupationmentioning

confidence: 99%

The time of concentration application in studies around the world: a review

Almeida

Guarienti

et al. 2021

Environ Sci Pollut Res

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The time of concentration (Tc) is the main hydrological parameter used to characterize the response of a given Hydrological Response Unit (HRU) to a precipitation event. Because of its importance, the determining Tc is an integral step in several studies involving runoff. Thus, this work presents an unprecedented review of the application of Tc in different lines of research involving water resources around the world. In this article, 1252 publications were listed, obtained from seven different databases, published by 2020, that presented the expressions "time of concentration," "runoff," and "watershed." The articles and conference papers obtained in this research were classified into 12 topics. The number of publications per topic and per country was measured and a cluster analysis was developed to verify the similarity of the distribution of topics per country. In addition, 125 equations applied in related publications for the estimation of Tc are also listed.

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“…), rainfall characteristics and land use (dynamic factors) are important in understanding the process of rainfall runoff (WEI et al, 2007). In dry tropical forests, where almost all the watercourses are ephemeral, surface runoff is determined only by the characteristics of the rainfall events and land use (MEDEIROS et al, 2014;SANTOS et al, 2017;ANDRADE et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have shown that changes in land use significantly alter the hydrological responses of small river basins (FOHRER et al, 2001;ASHAGRIE et al, 2006;ANDRADE et al, 2017). The adoption of suitable plant cover improves the physical properties of the soil and increases the rate of infiltration (MAGLIANO et al, 2015), with a consequent reduction in surface runoff (ARNAU-ROSALÉN et al, 2008;XIAO et al, 2011WANG et al, 2012.…”

Section: Introductionmentioning

confidence: 99%

“…), as características pluviométricas e o uso da terra (fatores dinâmicos) são determinantes no entendimento do processo chuvaescoamento superficial (WEI et al, 2007). Em florestas tropicais secas, onde os cursos hídricos, em quase sua totalidade, são efêmeros, o escoamento superficial é totalmente determinado pelas características dos eventos pluviométricos e do uso da terra (MEDEIROS et al, 2014;SANTOS et al, 2017;ANDRADE et al, 2017).…”

Section: Introductionunclassified

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Plant cover and hydrological response in a seasonally dry tropical forest (SDTF)

Andrade

Costa²,

Santos³

et al. 2017

AGRO@MBIENTE ON-LINE

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Abstract:The scarcity of information on the processes of rainfall-flow limits understanding of the hydrology of dry regions of the world. In order to minimise the problem, this study was developed to investigate the influence of the characteristics of rainfall events and plant cover on the effective precipitation (Pe) in a seasonally dry tropical forest (SDTF) in the Northeast of Brazil. The study was carried out in two paired watersheds, one with SDTF under regeneration for 35 years (CR35) and the other under thinned SDTF for 5 years (TC). A historical series of five years (2009)(2010)(2011)(2012)(2013) was analysed, with a total of 203 rainfall events, where only those rainfall events that generated a Pe > 1.0 mm were considered. CR35 had a greater number of Pe events (47) than TC (35). Rainfall depth and intensity were the factors that best explained the effective precipitation under both types of vegetation cover. The influence of herbaceous vegetation on the reduction of surface runoff was demonstrated by the smaller runoff depth and the greater potential for soil water storage in the watershed under thinned Caatinga. This fact leads to the conclusion that the technique of thinning is suitable management for Caatinga vegetation, and is capable of promoting the retention of soil water. Resumo: A escassez de informações sobre os processos chuva-deflúvio é uma limitação no entendimento da hidrologia das regiões secas do globo terrestre. Buscando minimizar esta problemática, desenvolveuse este estudo objetivando investigar as influências das características dos eventos pluviométricos e da cobertura vegetal na precipitação efetiva (Pe) em floresta tropical sazonalmente seca (FTSS), no nordeste do Brasil. O estudo foi realizado em duas microbacias emparelhadas, uma com FTSS em regeneração há 35 anos (CR35) e outra com FTSS raleada há 5 anos (CR). Foi analisada uma série histórica de cinco anos (2009)(2010)(2011)(2012)(2013), com um total de 203 eventos pluviométricos, sendo considerados somente os eventos pluviométricos que geraram Pe > 1,0 mm. A CR35 apresentou um maior número de eventos (47) de Pe do que a CR (35). A altura pluviométrica e as intensidades foram os fatores que melhor explicaram a precipitação efetiva em ambas as coberturas vegetais. A influência da vegetação herbácea na redução do escoamento superficial foi evidenciada pelas menores lâminas escoadas e pelo maior potencial de armazenamento de água no solo na microbacia com a Caatinga raleada. Tal fato permite concluir que a técnica de raleamento representa um manejo apropriado para a vegetação da Caatinga, sendo capaz de promover a retenção de água no solo.Palavras-chave: Chuva-deflúvio. Uso da terra. Estrato herbáceo. Semiárido.Revista Agro@mbiente On-line, v. 11, n. 4, p. 258-268, outubro-dezembro, 2017259 Plant cover and hydrological response in a seasonally dry tropical forest (SDTF)

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Land Use Effect on the CN Model Parameters in a Tropical Dry Environment

Cited by 9 publications

References 23 publications

Initial abstraction ratio and Curve Number estimation using rainfall and runoff data from a tropical watershed

Initial abstraction ratio and Curve Number estimation using rainfall and runoff data from a tropical watershed

The time of concentration application in studies around the world: a review

Plant cover and hydrological response in a seasonally dry tropical forest (SDTF)

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