Modeling Infiltration Well Performance for Local Flood Control (PAP014890)

Código

PAP014890

Autores

Rodrigo Braga Moruzzi, Ademir Paceli Barbassa, Loide Angelini Sobrinha

Tema

Urban Floods

Resumo

Rainwater runoff from the surface in built-up areas must be managed in some way in the built environment. The connection of this stream to a conventional drainage system contributes to the problem of flooding. Alternative structures should provide temporary reservation with outlet to the drainage system and / or infiltration into the soil. The infiltration well is a structure with favorable characteristics for the installation area in a shorter plant, when compared to other structures, such as a ditch, infiltration trench, permeable pavements. However, the performance dry well is strongly influenced by its capacity of draining storm water, which depends on soil hydraulic conductivity. This paper presents the comparison of hydraulic conductivity obtained by field essays and those measured in real scale by using PULS method. For this, the rainwater blade, the inlet flow and the water levels inside a real system were measured and set as input for the PULS method. As hypothesis, the infiltration loading rate was assumed constant in time and the storage effect on flat area was neglected for both isolate and consecutive storms in order to make the modeling simpler. The infiltration loading on the dry well was analyzed for bottom and wall separately. Infiltration loading rate were obtained from essays, however it was also used as a parameter for adjusting experimental and theoretical curves. For modeling eleven rainy events were used. The Nash-Sutcliffe (NS) coefficient and the emptying time err were used to model evaluation, which resulted in values up to 0.98 and 25%, respectively.