water management in paris area toward sustainable development · 2012. 12. 6. · successive...
TRANSCRIPT
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Water Management in Paris AreaToward sustainable development
Jean-Pierre TABUCHI
Direction Santé Environnement
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Successive visions of sanitation
Objectives in sanitation has changed
1. 19th century to mid 20 th century : Hygienic approach - Evacuate waste water downstream from Paris
2. At the turn of the 70’s : Environmental approach
3. At the end of the 80’s : Sustainable Development
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SIAAP's Presentation
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� Being a major actor in sustainable development of Pari s area � as regards the preservation of the Seine, English C hannel and
North Sea;
� Being a public utility environmentally responsible, � fulfilling its mission with the smallest environmen tal footprint
possible;
� Being a « ecocitizen » public utility. � ensuring that in its daily activity it shows in his exemplary
behavior towards the environment as should every ci tizen
What Sustainable Development means for the SIAAP ?
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Seine River Catchment
Area : 97 000 km 2
Population : 17 000 000 inhabitants8 regions, 25 counties, 9 000 communitiesRivers length : 66 000 km
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Seine River Catchment
Seine river length : 762 kmArea : 78 650 km 2
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Seine River Catchment
Marne river length : 506 kmArea : 8 850 km 2
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Seine River Catchment
Oise river length : 340 kmArea : 16 108 km 2
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Hydrology
� Flow (Paris)
• Average flow : 310 m3/s• Mediane : 210 m3/s• Low flow : 95 m3/s
� Rainfall
• Average : 650 mm/y • 950 mm (2001) - 450 mm (2003)• 170 d/y with 110 day > 1 mm
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Les Fleuves français : D ébits interannuels
0
500
1 000
1 500
2 000
2 500
3 000
janv. févr. mars avr. mai juin juil. août sept. oct. nov. déc.
Déb
it m
³/s
La Seine
La Loire
Le Rhône
Le Rhin
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Main french rivers and anthropogenic impacts
12 70 000Paris170La Seine(Poissy)
1,8 4 700Lyon380Le Rhône
0,7 1 350Strasbourg520Le Rhin
habitants / m³.smillion d'habitantsm³/s
Population ImpactAgglomération
Débit d'étiage quinquennal
Fleuve
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SIAAP's settlements
Val d'Oise
Yvelines
Essonne
Seine et Marne
La Seine
La Marne
L'Oise
Seine-Saint-Denis
Val de Marne
Hauts
de
Seine
PARIS
Seine Grésillons
Seine aval
Seine centre
Seine MoréeMise en service : 2012
Marne aval
Seine amont
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The SIAAP’s Board
�33 members�Paris : 12 members�Each Departement : 7 members = 21
members�President : M. Ouzoulias�An executive board : 14 members
�Date of Birth : 1970
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Collecting area
� 8,9 M connected inhabitants� 4 départements, 124 cities
158 communities outside SIAAP� 1 980 km2
� 23 syndicats� 400 industriels
� 2,3 Mm3/d of waste water
� Inner suburb : Combined sewer system� Outer suburb : separative or mixed sewer system
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Population
Area Population DensityNumber of community
Paris 105 2 153 600 20 433 192 176 1 517 000 8 619 3693 236 1 459 000 6 182 4094 245 1 279 000 5 220 4777 5 915 1 260 000 213 51478 2 284 1 395 000 611 26291 1 804 1 188 000 659 19695 1 246 1 148 000 921 185
Paris Area 762 6 408 600 8 406 124Ile-de-France 12 011 11 399 600 949 1 281
CityDensity
inhab/km 2
Paris 20 433Djakarta 13 290NY 10 292New Delhi 9 291Paris Area 8 406Moscou 7 540Hong Kong 6 688Rio 5 190Londres 4 700Amsterdam 4 477Mexico 3 584Washington 3 127LA 3 041
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5 WWTP: 2,6 Mm3/j Dry weather,3,5 Mm3/j Max. biological capacity4,6 Mm3/j Rainy conditions
450 km of meshed transport network
900 000m3 of storage capacity
WWTP Storage facilities
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1700 employees
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� Length : 420 km � Diameter : 2,5 to 6 meters� Depth : 10 to 100 meters
Main Sewers
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Storage facilities : 900 000 m3
� For stromwater management� Against floods and for stormwater pollution control
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Seine river
� 2 specific kinds of settlements :
Dams for Wastes collection Oxygen Bublers
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Real Time Control : MAGES
� Developped by the SIAAP and its partners� Aims :
• Reduce stormwater spillages (not more than 2 spills/year)
• Optimized WWTP filling and emptying storagetanks
� With :
• Rainfall forecasts• Numerical modelling
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Évolution des capacités épuratoires
1 200
1 000
800
600
400
200
0
1880 1900 1920 1940 1960 1980 2000 2007
Millions de m³/an
Capacité de traitement
Eaux usées produites
Achères I
Achères II
Achères III
Achères IV
Valenton IA
Valenton IB
ColombesValenton II
Grésillons
Waste water production
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WWTP Capacity 2012
Dry Weather
BOD5 NTKSeine aval 4 564 000 4 818 000
Seine amont 2 618 000 2 277 000Seine centre 982 000 774 000
Seine Grésillons 320 000 299 000Marne aval 500 000 464 000
Total 8 984 000 8 631 000
BOD5Seine aval 7 500 000
Seine amont 3 667 000Seine centre 900 000
Seine Grésillons 372 000Marne aval 555 000
Total 12 993 000
Units : Persons Equivalent
Rainy Weather
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Waste Water Washing Machine
Population municipale : 8 860 000 habitants
Bilan te chnique 2009
Réseaux communauxet départementaux
Réseau de transport SIAAP
POLLUANTS ELIMINES
MES : 587,5 t/jDBO5 : 445 t/j
DCO : 1048,5 t/jNTK : 97,56 t/jPtot : 13,3 t/j
Volume : 2 351 000 m3/jMES : 634 t/jDBO : 481 t/jDCO : 1191 t/jNTK : 119 t/jPtot : 15,6 t/j
ENTREE USINESVolume : 2 315 000 m3/jMES : 622 t/jDBO5 : 475 t/jDCO : 1175 t/jNTK : 118,1 t/jPtot : 15,4 t/j
REJETS DES USINES
MES : 38 t/jDBO5 : 31 t/jDCO : 130 t/jNTK : 20,7 t/jNGL : 70,1 t/j Ptot : 2,2 t/j
Sables : 5,8 t/jDéchets : 11,3 t/j
Déversements temps de pluie
MES : 31,5 t/jDBO5 :15,5 t/jDCO :42,9 t/jNTK : 3,1 t/jPtot : 0,5 t/j
Rejets directs1 jour
Volume : 6 220 m3/jMES : 2 t/jDBO5 : 1 t/jDCO : 2,8 t/jNTK : 0,2 t/jPtot : 0,03 t/j
Graisses : 6,5 t/jSables : 9,8 t/j
Déchets : 12,2 t/jBoues biologiques : 351,8 t/j
ENERGIE - REACTIF
106 joursVolume : 99 000 m3/j
Seine-AvalSein-AmontSeine-Centre
Seine-GrésillonsMarne-Aval
ENERGIE : 2 603 MWhGaz - achats : 175 MWhGaz - production : 1 173 MWhElectricité - achats : 1120 MWhElectricité - prod. : 77 MWhFioul : 72 MWh
REACTIFSChlorure ferrique : 201 tMéthanol : 45,6 tNitrate de calcium : 94 t
ENERGIE - REACTIF /jour
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Impact on receiving waters
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BOD 5
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Ammonia
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Phosphorus
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24,0
19,7
30,6
24,2
20,9
17,5
23,1
15,7
23,4
19,2
16,3
12,0
0
5
10
15
20
25
30
35
40
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Not
e IP
R
Fish index
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Financial data
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Water Price
Prix Zone Eau de Paris : 3,02 €/m3Prix Zone SEDIF : 4,00 €/m3
Prix Moyenne territoire SIAAP: 3,57 €/m 3
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Le prix de l'eau source : OBUSASS
36
€/m3 TTC Prix total Total eau potable
Total eaux
usées
VNF
Moyenne pondérée 3.567 1.408 2.149 0.011Paris 3.017 1.179 1.827 0.011SEDIF 4.001 1.581 2.410 0.011Maximum 5.022 1.581 3.430 0.011
€/m3 HT Départements SIAAP Communes ouinter-communalités
Syndicat local
Coût moyen
Paris 0,269 0,764 1,033
Départements 0,49 à 0,52 0,764 0,08 à 1,16 1,28 2,175
Eau potable : 40 %Assainissement : 60%
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A new situation
• Financial difficulties of local authorities
• In front of the reduction in the consumptions :• Where to find the new financial resources tomorrow?
• How to finance the general water policy� Is the water bill the right base ?� Where the water bill stops and wheer starts the taxpaye r
• New stakes� Access to water for all� Stormwater management� Asset management� …
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Finance : Investments
� Investment revenues 2012 : 660 M €
Loans (AESN); 60M€ 9%
Loans (banks); 234,3M€ 36%
Subsidies AESN et Région; 133M€
20%Various; 2,2M€ 0%
Amortization; 230,3M€ 35%
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Finance : Operating
�Operating expenses 2012 : 565 M €
Redevances 400,2Primes d’épuration et Aquex) 58Autres produits de gestion courante 5,3Divers 15,9
Total 565,1
91
Recettes BP 2012
Quote-part des subventions virées au résultat de l'exercice
Routine management expenditure 221,3Salary 85Frais financiers 19,5Dépenses exceptionnelles 9,3Total 565,1
Dépenses BP 2012
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The SIAAP and the Greater Paris
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Horizons of Greater Paris
�A medium -term vision : 2030
�A long-term lighting : possible effects of climatechange
�How to design the city today to be sustainable tomorrow?
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Demographic evolution
43
9.6
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.8
10.0
1995 2000 2005 2010 2015 2020 2025 2030 2035
Nom
bre
d'ha
bita
nts
en m
illio
ns
SIAAP tendanciel SIAAP selon prévision INSEE
?
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44
What water consumption ?
510
52
30
35
40
45
50
55
60
65
70
75
80
0
100
200
300
400
500
600
700
1995 2000 2005 2010 2015 2020 2025 2030 2035Volume tendanciel Volume H1 Volume H2 Conso. tendancielle Conso. H1 Conso. H2
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The possible effects of climatechange
�Effects awaited from the middle of the century
� Incresased of average annual temperatures� Mid- century : + 1,5°C à + 3°C
�Rainfalls : a decreasing trend
� Incresased evapotranspiration� Mid- century : + 16 %
�Decrease of rivers flows
More droughts
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Conséquences pour l’assainissement
Seine's flowdecrease
Increase of pollutants loads atWWTP
Seine more fragile
More efficiencyMore reliability
5,3 t 4 t
A scissors effect related to possible effects climate change
Good status
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Prix de l’eau, coût de l’assainissement
�Uncertainties on the tax base�Cost of the drinking water a priori stabilized�Sanitation costs trending upward ;
� Continued efforts to contribute to the objectives o f the WFD
� Asset management
�Decrease of tax bases and increase of sanatiation cost = increase of the water bill
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Towards a new governance ?
�For a source control management :� Stormwater� Micropollutants
�To organize the city planification and its sanitation
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Conclusions
�Main stakes :�To be able to keep the Seine river in good status�To adapt the governance of Paris area's
sanitation�To cope with the uncertanities on water
financing policy
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Thank you for your attention