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SPECIFIC TASKS: SEWER REHABILITATION

AND ANALYSIS MEASURES

Rodrigo Concha Jopia

FLUMEN Research Group

Technical University of Catalonia

Barcelona TECH

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NEWS!

Don’t forget to do a small report including: catchment discretization FINISHED

calibration/validation FINISHED,

sewer network diagnosis for a T return period design

rainfall (hopefully finished…)  This report has to be uploaded tomorrow

Wednesday afternoon

T has been changed:

Team 1: 10 years Team 2: 15 years

Team 3: 20 years

Team 4: 25 years

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INTRODUCTION

 After the diagnosisof the La Rieretasewer network

(analysis under a Tyear return periodrainfall) each teamhas to perform a

particular analysis.These specifictasks are detailednext

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TASK Nº1 (TEAM 2)

Network rehabilitation

changing sewercharacteristics: crosssections (shape anddimensions), slopes andmaterials

Do not change the plantlayout of sewer network

Try to reduce the floodingvolume (hopefully 0)

Hydraulic performance ofrestored network should

be better than the non-restored one

Try that all network worksunder free surface flow

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TASK Nº2 (TEAM 3)

Network rehabilitationusing detention basins

Use of Storage Unitand Weir/Orifice/Pump

SWMM 5’objects Try to reduce the

flooding volume(hopefully 0)

Hydraulic performanceof restored networkshould be better thanthe non-restored one

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TASK Nº2 (TEAM 3)

Network rehabilitationusing detention basins

Use of Storage Unit and

Weir/Orifice/Pump

SWMM 5’objects Define initial properties:

SU: max depth, d/As

relationship

Outlet Regulators: cross

sections, dimensions,

discharge coefficients

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TASK Nº3 (TEAM 1)

Network rehabilitationchanging the impervioussurface catchment area

Use of catchmentrepresentation method

Some LIDs: infiltrationtrenches, porouspavements, vegetativeswales, etc.

Try to reduce the flooding

volume (Hopefully 0)

Hydraulic performance ofrestored network shouldbe better than the non-

restored one

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TASK Nº3 (TEAM 1)

Network rehabilitation changing the impervious surfacecatchment area

catchment representation method

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TASK Nº4 (TEAM 4)

Network analysis using a 3-year rainfall time serie data, and to find

the network sewer security level for surchage and for flooding Make a continuous simulation; consider evaporation losses

Use of Statistical tool of SWMM 5 for analysis purposes: floodingfrecuency)

Rainfall analysis: consider duration, mean intensity, volume and

peak intensity

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TASK Nº4 (TEAM 4)

Network analysis using a 3-year rainfall time serie data,and to find the network sewer security level for surchageand for flooding

Use of Statistical tool of SWMM 5 for analysis purposes:flooding frecuency)

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KEY INFORMATION SOURCE

More details about modellingusing SWMM 5 can be found

in

Storm Water Management

Model Applications Manual

It can be downloaded from

the official SWMM web pagehttp://www.epa.gov/nrmrl/wswrd/wq/models/swmm/#Downloads 

http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/