Simulação hidrologica de uma bacia rural utilizando o modelo TOPMODEL acoplado a um modelo de interceptação de chuva pela cobertura vegetal / Hydrological simulation of a rural basin using the TOPMODELcoupled to a model of rainfall interception by vegetation

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The study of hydrological mechanisms as well as determination of available water in watersheds provides conditions for assessment of water resources. The semi-distributed model of rainfall transformation into flow TOPMODEL has been widely used by researchers, since its development in 1979. This paper describes the use of TOPMODEL to simulate the hydrological behavior of a rural watershed with an area of 4.6 km2, mainly cultivated with sugar cane, located in the city of Limeira, in the State of São Paulo. The model was implemented in two phases: isolated and coupled with a model of rainfall interception by vegetation, considering two hypotheses (H1 and H2) for the distribution of precipitation intercepted over time. In hypothesis H1, the intercepted precipitation (PP) is evenly distributed over time, and each value of rainfall over time of the event in question is multiplied by a coefficient of correction a, calculated using the relationship between the intercepted and incident precipitation. In hypothesis H2, the total amount of intercepted precipitation (PP) during the event analyzed is subtracted from the first value of the rainfall event (P1) or from the first amounts, in case PP is greater than Pn

ASSUNTO(S)

bacia hidrografica hidrologia - modelos sugarcane cana-de-açúcar evaporação estimates of flow watershed evaporation previsão de vazões

ACESSO AO ARTIGO

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