The course project consists on a sewer rehabilitation process of an urban catchment called “La Riereta”. To carry out this process, a hydrological and hydraulic model will be built up using the EPA Storm Water Management Model (EPA SWMM).

The urban catchment is located in Sant Boi de Llobregat, which is a town near to Barcelona. This catchment has a surface area of 18 ha approximately. Moreover, it presents high indexes of impermeability due to is mainly inserted in the old historic centre of the city. The catchment slope varies from high to medium values, and the drainage of the roofs discharges directly to the street through down spouts. Additionally, a group of inlets distributed in the streets ensure the collection of the generated run-off after the rainfall occurs.

The drainage system of “La Riereta” is a combined sewer network, and it is mainly composed by circular cross-section pipes with different diameters.

To build up the numeric model of the study, participants will have to divide it in sub-basins, assigning initial values to the parameters required from the EPA SWMM code. 

The main objectives of the study are to propose rehabilitation measures through the building up of the urban model of La Riereta. To achieve these objectives, different tasks will be carried out as follows:

• Basin discretization
• Determination of the effective rainfall
• Parametrization of the model
• Calibration and validation