wasserverband eifel rur - june 2013 annex 6

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Reservoir System Rurtalsperre Obersee (drinking water) Rurtalsperre Hauptsee Oleftalsperre (drinking water) Urfttalsperre DROP 2013-06-19 UB 4.5 Brands WVER service area: Rur catchment area

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Page 1: Wasserverband Eifel Rur - june 2013 annex 6

Reservoir System Rurtalsperre

Obersee (drinking water) Rurtalsperre Hauptsee Oleftalsperre (drinking water) Urfttalsperre

DROP 2013-06-19UB 4.5 Brands

WVER service area:Rur catchment area

Page 2: Wasserverband Eifel Rur - june 2013 annex 6

treatment of stormwater and rainwatercatchment of Obersee

stormwater overflow: annual discharge rate 15 % soil filter retention tank: (98 % hydraul. efficiency) rainwater treatment basin (Einruhr) 

catchment of Hauptsee stormwater overflow: annual discharge rate 25 %

Rurtalsperre: requirements

waste water treatment plants: reduction of microbes reduction of phosphorus (0,2 mg/l Ptot in the effluent = monitoring value water authority)

Obersee

Hauptsee

DROP 2013-06-19UB 4.5 Brands

Page 3: Wasserverband Eifel Rur - june 2013 annex 6

The Oberseecatchment

measures:

uv disinfection of effluent from wwtps improvement of the Konzen wwtp(membrane bioreactor) building of soil filter retention tanks  cooperation program with farmers installation of sewer system in small communities reduction of incorrect connections to    the sewer and of infiltration water 

soil filter retention tank + uv disinfection (Konzen)

DROP 2013-06-19UB 4.5 Brands

Page 4: Wasserverband Eifel Rur - june 2013 annex 6

measures

Einruhr wwtp: changing the discharge from  Obersee to Hauptsee closing down of two small wwtps rain water treatment baisin  improvement of the Woffelsbach wwtp  (membrane bioreactor, sewer pipe run along lake bottom collects wastewater from the former Rurberg wwtp) decrease of the storm water overflow rate 

Rurtalsperre:

Obersee

Hauptsee

DROP 2013-06-19UB 4.5 Brands

Page 5: Wasserverband Eifel Rur - june 2013 annex 6

Rurtalsperrewater quality

1998 2000 2004 2011 2012

Obersee 2,30 2,13 1,84 1,91 n.b.

Hauptsee 1,93 1,69 1,60 1,40 1,60

trophic level trophic index

oligotrophic 0,5 – 1,5

mesotrophic 1,6 – 2,5

eutrophic 1

eutrophic 2

2,6 – 3,0

3,1 – 3,5

polytrophic > 3,5

Methode: nach LAWA (2001)data: MUNKLV project „Maßnahmen zur Mnimalemission in den Rursee“,

LANUV, WVER

DROP 2013-06-19UB 4.5 Brands

Page 6: Wasserverband Eifel Rur - june 2013 annex 6

Oleftalsperredrinking water reservoir

objective:enlargement of hypolimnion during summer to avoid plankton avoid manganesein raw water

DROP 2013-06-19UB 4.5 Brands

Page 7: Wasserverband Eifel Rur - june 2013 annex 6

Oleftalsperredrinking water reservoir

raw water[m. a. s. l.]

430437,5445

452,5

[m a

bove

sea

leve

l]

temperature

temperature [°C]

DROP 2013-06-19UB 4.5 Brands

Page 8: Wasserverband Eifel Rur - june 2013 annex 6

Oleftalsperredrinking water reservoir

raw water[m. a. s. l.]

430437,5445

452,5

[m a

bove

sea

leve

l]

Oleftalsperre 2011turbidity

turbidity [fnu]

DROP 2013-06-19UB 4.5 Brands

Page 9: Wasserverband Eifel Rur - june 2013 annex 6

Oleftalsperredrinking water reservoir

raw water[m. a. s. l.]

430437,5445

452,5

[m a

bove

sea

leve

l]

Oleftalsperre 2011oxygen

oxygen content [mg/l]

DROP 2013-06-19UB 4.5 Brands