FIRST REPORTTEAM 1:ANA CAROLINE PITZER JACOB

JAIME TORRICO ACHA

JONATAN ROBERTO

VANESA LUCANA BARRAL

TEAM 1

STUDY OF THE DRAINAGE NETWORK OF AN URBAN CATCHMENT

LA RIERETA, SANT BOI DE LLOBREGATSPAIN

Thursday, july 14th 2011

OBJECTIVES

• Discretization of the basin (physical parameters);• Determination of hydraulic parameters of the basin;•Determination of effective rainfall;•Calibration and validation of hydrological-hydraulic model of Riereta basin;•Modeling with the design rain and diagnosis of hydraulic operation according to the results;•Changes and/or alterations of drainage network in accordance with operational hydraulics criteria, maintaining the current network.

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Basin Characterists

•Urban basin•16,07 ha•Highly impervious area

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SUBCATCHMENTS DISCRETIZATION

•Generation of contour map•Obtaining coordinates and elevations (interpolation)•Location and delimitation of the basin

•Definition of the subcatchments•Obtaining lengths of pipes

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DEFINITION AND INPUT OF HYDROLOGICAL PARAMETERS

Variables

• % Slope = Terrain• % Imperv = 90• % Zero- Imperv = 50• Drying Time= 0.3 • N-Imperv = 0.017• N-Perv = 0.025

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Ven T. Chow

Determination of Width"W"

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EQUATIONS

Sk = (A2 – A1) / A

W = (2 – Sk) * l

LOSSES METHODS:

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• CN=98

• PL= 1.83 mm/h

Curve Number method Horton method

MODEL CONSTRUCTIONLa Riereta Model

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MODEL CALIBRATION

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• Flow Diagram of the calibration process

RESULT ANALYSIS

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N

Comparison between Efren rain event outflow and the prognostic generated by the SWMM model

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THANK YOUGRACIAS

OBRIGADO

Calibration in progress…………………………