Overview Introduction - Background/Context - General Aims & - - PDF document

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Overview Introduction - Background/Context - General Aims & - - PDF document

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Integrated management and modelling in urban drainage systems: the potentialities in a developing megacity Juan Pablo Rodrguez, M. A. Daz-Granados, M. S. Rodrguez, S. A. Fonseca, G. L. Mestra, J. C. Penagos, . Maksimovi and N.

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SLIDE 1

Integrated management and modelling in urban drainage systems: the potentialities in a developing megacity

Juan Pablo Rodríguez, M. A. Díaz-Granados, M. S. Rodríguez, S. A. Fonseca, G. L. Mestra, J. C. Penagos, Č. Maksimović and N. McIntyre

Environmental and Water Resource Engineering – EWRE Urban Water Research Group - UWRG Imperial College London

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

Overview

  • Introduction
  • Background/Context
  • General Aims & Objectives
  • Brief background to the case studies
  • Analysis to be performed – Knowledge gaps
  • Model developments & Initial results
  • Future work

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

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SLIDE 2

Background/Context

  • Accelerated urbanization in developing countries
  • Conflictive water services: water supply, drainage,

sewage collection and treatment, and receiving water uses

  • Pressures on urban water systems (water balance &

water quality)

  • Effective management of UDS = scientific understanding
  • f their impacts

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

Background/Context

  • UWWS: sewer system – WWTP – river
  • UWWS have been designed, operated and improved as

separate entities

  • Potential benefits of a holistic management (Developing

countries) - Key role of simulation models

  • ↓ pollutants discharged into the receiving system
  • Sewer solids provide a transport matrix for different

pollutants

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

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SLIDE 3

General Aims & Objectives

  • Bogotá (Colombia) is a prime example of a mega-city

demanding an integrated management of water resources

  • Development and application of appropriate modelling

tools at different levels of detail

  • Integrated UDS modelling framework (Bogotá, …)
  • City Drain toolbox + Case study from Europe (Linz,

Austria)

  • Two different scales: sub-catchment and macro-modelling

scales

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

Background to case studies - Bogotá

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

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SLIDE 4

Background to case studies Bogotá

  • 7 million inhabitants, around 330 km2 of urban area
  • Storm and WW systems with a large number of wrong

connections

  • Wastewater and CSO discharges into the rivers
  • DWF 17 m3 s-1 vs. WWT system capacity 4 m3 s-1
  • The Bogotá River with a mean flow of 10 m3 s-1 has a 60

km anaerobic stretch

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

Analysis to be Performed

  • 1. Sub-catchment scale

How the complexity of the storm water quality model and the level

  • f spatial detail of the sewer

system affect the overall predictability and robustness?

Methodology Comparative modelling between study cases

  • “El Virrey” experimental sub-

catchment

  • Linz

Detail Level Performance

Modelling Approach Complexity i Optimum i Modelling Approach Complexity n Decreasing Complexity ΔDL Optimum n ΔP

Uncertainty and sensitivity analysis

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

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SLIDE 5

Analysis to be Performed

  • 2. Macro-modelling scale
  • Combined or separated systems? How wrong

connections affect the system performance

Methodology

  • Bogotá Case

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

SUPPORTING DATA AND TOOLS FOR INTEGRATED MODELLING – THE BOGOTÁ CASE SEWER WWTP RECEIVING SYSTEM

Experimental subcatchment El Virrey (Uniandes, 2001) Input pollutant loads to El Salitre WWTP (Rodríguez et al., 2008) Bogotá river water quality modelling (Camacho et al., 2002) Wastewater DWF patterns (Díaz-Granados et al., 2008) Water quality modelling of three urban rivers - Salitre, Fucha and Tunjuelo (Raciny et al., 2008) Domestic and industrial wastewater loads (Uniandes

  • SDA, 2008)

GIS – based tool for identifying wrong connections likelihood (Mestra, 2008) GIS – based tool for estimating sediment accumulation rates (Uniandes - EAAB, 2008) WQO for four urban rivers: Torca, Salitre, Fucha y Tunjuelo (Uniandes - SDA, 2008) CITY DRAIN toolbox – Fuzzy logic techniques in order to assess CSO performance (Fonseca et al., 2008) Implementation of the Bogotá’s urban drainage system using CITY DRAIN (Rodríguez et al., 2008)

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

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SLIDE 6

Supporting data and tools

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

GIS – based tool for identifying wrong connections likelihood (Mestra, 2008)

Supporting data and tools

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

GIS - based tool for estimating sediment accumulation rates (Uniandes - EAAB, 2008)

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SLIDE 7

Supporting data and tools

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris El Virrey storm water channel

CITY DRAIN toolbox – Fuzzy logic techniques in order to assess CSO performance (Fonseca et al., 2008)

Supporting data and tools

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

Bogotá’s urban drainage system esquemtization to be implemented using the CITY DRAIN toolbox (Uniandes, 2009)

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SLIDE 8

Initial results Subcatchment scale

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

Initial Results

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

200 400 600 800 1000 1200 1400 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Q (m3/s) Time [minutes] Q measured Q simulated E = 0.9525 200 400 600 800 1000 1200 1400 100 200 300 400 500 600 700 800 900 1000 TSS (mg/l) Time [minutes] Measured Simulated E = 0.6191 950 1000 1050 1100 1150 1200 100 200 300 400 500 600 700 800 900 TSS (mg/l) Time [minutes] Measured Simulated E = 0.6191

Rainfall runoff and TSS modelling at Caracas 77 – 8 May 2001 Best predictions

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SLIDE 9

Initial Results

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

200 400 600 800 1000 1200 1400 0.2 0.4 0.6 0.8 1 1.2 1.4 Q (m3/s) Time [minutes] Q measured Q simulated E = 0.9019 500 1000 1500 2000 2500 TSS (mg/l) Model output and associated confidence limits (UCI=0.95, LCI=0.05) 200 400 600 800 1000 1200 1400 0.5 1 Time [minutes] dCFL E = 0.3443 500 1000 1500 2000 2500 3000 3500 TSS (mg/l) Model output and associated confidence limits (UCI=0.95, LCI=0.05) 200 400 600 800 1000 1200 1400 0.5 1 Time [minutes] dCFL E = 0.3443

Rainfall runoff and TSS modelling at Flores 88 – 8 May 2001 Uncertainty bands for TSS

Future Work

Sub-catchment scale:

  • Fully analyze all available events at the experimental sub-

catchment El Virrey (event based modelling)

  • Analyze available data from experimental subcatchment

at Linz (continuous modelling) Macromodelling scale:

  • Fully implement and test the City Drain toolbox

application to the Bogotá´s urban drainage system

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris

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SLIDE 10

THANK YOU FOR YOUR ATTENTION! jrodrigu@imperial.ac.uk pabl-rod@uniandes.edu.co

WWW-YES- 2009, 8th Word Wide Workshop for Young Environmental Scientists, 2-5 June 2009, Paris