Zurich Water Supply
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Welcome to Zurich Water Supply Clean and safe drinking water for everyone Stadt Zürich Wasserversorgung Supply Area Ober- Bachs Rorbas Wiesen- Hoch- Dättlikon weningen felden Bülach dangen Nieder- Neer- Pfungen weningen Schöfflis- Höri Embrach Elsau ach Bachen- Winterthur dorf Nieder- bülach Ober- Elgg Schlei- Steinmaur nikon glatt Winkel Embrach Regens- Lufingen Brütten City of Zurich Boppelsen Oberglatt Schlatt berg Dielsdorf Otelfingen Nieder- Nürens- Buchs hasli Kloten dorf Kyburg Zell Würenlos Bassers- Dän- Rümlang Lindau Turbenthal Hüttikon dorf ikon Regensdorf Dällikon Opfikon- Weisslingen - 400,000 inhabitants Oetwil Glattbrugg Dietlikon Illnau- Wild- Killwangen a.d.L. Effretikon Weiningen Wangen- berg Gerolds- Ober- Wallisellen Spreitenbach Untereng- Brüttisellen wil engstringen Russikon Wila stringen Dietikon Dübendorf Volketswil Sternenberg Schlieren Schwerzen- Bergdietikon Zürich Fehraltorf Bauma Urdorf bach Widen Pfäffikon Rudolfstetten- Uitikon Fällanden Greifen- Hittnau Eggenwil Plus 67 communities Friedlisberg see Uster Berikon Birmensdorf See- Zufikon Wettswil Zollikon Bäretswil Oberwil- gräben Aescha.A. Zumikon Lieli Maur Islisberg Stallikon Kilch- Wetzikon - 510,000 inhabitants Unterlunkhofen Bon- berg Küsnacht Mönch- Arni Adliswil stetten altorf Gossau Oberlunkhofen Rüschli- Erlenbach Hinwil Hedingen kon Jonen Herrliberg Egg Affoltern Thalwil 2 Aeugst a.A. Meilen Grüningen Dürnten Ottenbach a.A. Langnau - 660 km supply area Oberrieden Uetikon Oetwil a.S. a.A. a.S. Bubikon Rüti Obfelden Mettmen- Hausen Männe- a.A. Horgen dorf Hombrechtikon stetten Stäfa Rifferswil Masch- wanden Kappel a.A. Wädenswil Knonau Hirzel Cham Richterswil Stein- Baar Neuheim Schönen- hausen Wollerau berg Hütten Hünenberg Menzingen Zug Stadt Zürich Wasserversorgung Origin of the water Source 70 % Lakewater Springwaterplant 15 % Springwater Sihlbrugg 15 % Groundwater Lakewatertreatmentplant Lengg Lakewatertreatmentplant Moos Groundwaterplant Hardhof Stadt Zürich Wasserversorgung Catchment area of Zurich Water Supply Zurich Stadt Zürich Wasserversorgung Water supply before 1868 Stadt Zürich Wasserversorgung First water distribution 1868 Stadt Zürich Seite 6 Wasserversorgung Typhus epidemia 1884 Stadt Zürich page 7 Wasserversorgung Insufficient maintenance Stadt Zürich Wasserversorgung First Lakewaterplant at Silquai 1885 Stadt Zürich Wasserversorgung 1911: Decision to build Lakewater treatment plant Moos Stadt Zürich Seite 10 Wasserversorgung Stadt Zürich 3 Built:Wasserversorgung 1914, Capacity: 100‘000* m /day *including 20‘000 Springwater) Lakewater treatment plant Lengg Built: 1960 Expanded:1975, Capacity: 250‘000 m3/day Stadt Zürich Wasserversorgung Lakewater treatment Treatment facility Raw water pumping station Raw water intake 30 m Raw water pipe Pressure pipe 640 m 620 m Stadt Zürich Wasserversorgung Bactereoligical stable water Drinking water treatment (Lengg) without chlorination Filtration Desinfection und Oxidation Biological Treatment Pre-ozonation pH-correction To the reservoirs Rapid sand filtration Slow sand Second ozonation filtration Lake Zurich BAC Drinking water filtration pumping station Raw water pumping station Stadt Zürich Wasserversorgung Maintenance of the Slow Sand Filter Stadt Zürich Wasserversorgung Alternative Treatment train Biological Treatment Filtration Desinfection und Oxidation Desinfection Prefiltration Membrane Ozone BAC UV Lake Zurich Stadt Zürich Wasserversorgung New lakewater treatment plant Moos Stadt Zürich Wasserversorgung New lakewater treatment plant Moos Stadt Zürich Seite 18 Wasserversorgung Origin of the water 70 % Lakewater Springwaterplant 15 % Springwater Sihlbrugg 15 % Groundwater Lakewatertreatmentplant Lengg Lakewatertreatmentplant Moos Groundwaterplant Hardhof Stadt Zürich Wasserversorgung Springs around Zurich Zürichberg Filter Oetlisberg Schwamendingen 0 1 2 3 4 5 km Filter Hüttenrain Meilen Hütten Filter Filter Rehalp Filter Dolder Streitholz Zollikon Zürichsee Horgen Affoltern Filter Glaubten Zürich Thalwil Zentrale Sihlbrugg Filter Gubel Seewasserwerk Moos Wasserschloss Reservoir Entlisberg Wasserschloss Frauental Wasserschloss Chlemmeriboden Ragnau Wasserschloss Eichbach Pumpwerk Kohlboden Filter Dorf Wasserschloss Filter Triemli Filter Gontenbach Leimbach Filter Lyren Üetliberg Baar 160 Springs in Zurich 120 Springs in Sihl- and Lorzetal Stadt Zürich Wasserversorgung Spring water distribution The 85 emergency water fountains are included in the 400 spring water fountains and are connected to the 150 km spring water distribution system. Stadt Zürich Wasserversorgung Origin of the water 70 % Lakewater Springwaterplant 15 % Springwater Sihlbrugg 15 % Groundwater Lakewatertreatmentplant Lengg Lakewatertreatmentplant Moos Groundwaterplant Hardhof Stadt Zürich Wasserversorgung Groundwaterplant Hardhof Built: 1934/1973, Theoretical capacity: 150‘000 m3/day Stadt Zürich Wasserversorgung Groundwater plant Hardhof Stadt Zürich Seite 24 Wasserversorgung Technical implementation SB ARB1 B SB A ARB2 C VFB ARB3 D VFB Stadt Zürich Wasserversorgung Managing the ground water field Limmat GWTP Hardhof Sihl Stadt Zürich Wasserversorgung Real time ground water model Stadt Zürich Wasserversorgung Boundary conditions of the ground water model natural recharge abstraction/artificial recharge (precipitation – evaporation) groundwater table model boundary leakage Limmat Ground water field Hardhof outflow lateral inflow leakage Sihl Stadt Zürich Wasserversorgung Output of the numerical model Stadt Zürich Wasserversorgung Validation of the ground water model 1. Piezometers Stadt Zürich Wasserversorgung Validation of the ground water model 2. Soil conditions Stadt Zürich Wasserversorgung Validation of the ground water model 3. Hydrogeophysical conditions (ERT measurements) Stadt Zürich Wasserversorgung Validation of the ground water model 4. Sampling campaigns Stadt Zürich Wasserversorgung Make urban ground water harvesting future-proof Raw water harvesting Artificial recharge Drinking water quality Hydraulic conditions Stadt Zürich Wasserversorgung Urban ground water …… future-proof? Stadt Zürich Wasserversorgung Water distribution Maintainance of the system: 1100 km distribution 450 km household 8000 hydrants Yearly renewal rate of 30km. Stadt Zürich Wasserversorgung Online monitoring Stadt Zürich Wasserversorgung Consumption: 160 l / Person per day Dishwasher 2% 13% Personal hygiene Bath/shower 20% 31% Toilet Washing 19% Cooking/drinking and dish washing 15% 2 % Others Stadt Zürich Wasserversorgung Water pricing Average price per m3 drinking water: approx. 2 Fr. (yearly revenue: approx. 100 Mio.) Stadt Zürich Wasserversorgung 1200 fountains in the city of Zurich Stadt Zürich Wasserversorgung Thank you very much for your attention… Any questions? Stadt Zürich Wasserversorgung.