Transcript Drinking water supply on Langeoog situation and problems Holger Hinnah OOWV - The water board of Oldenburg and East Frisia The OOWV founded in 1948 as.

Drinking water supply on Langeoog
situation and problems
Holger Hinnah
OOWV - The water board of
Oldenburg and East Frisia
The OOWV
founded in 1948 as a water and soil board
institution with legal standing
since 1999: new department sewage disposal
OOWV- Area
The OOWV in figures
general company
year of foundation
1948
sewage disposal
since 1999
area
clients
7.850 km
ca. 1 Mill.
employees
651
thereof trainee
30
2
total assets
(drinking water and sewage) ca. 500 Mill. EUR
Stand:1/2004
Fields of activity
drinking water supply
sewage disposal
groundwater protection
assumption of further tasks possible
Department of drinking water
waterworks & water storage tanks
waterworks
water storage tank
Department of drinking water
in figures
members
9 rural districts
2 cities
1 municipality
capacity of the 15 waterworks
251.000 m / day
drinking water release
69 Mill. m / year
length of pipe system
13.000 km
accesses to households
320.000
clients
880.000
consumption per head
121 l / day
Stand: 4/2003
3
3
publicity
Ökologischer Landbau
farming
Organic
Cooperation
with farmers
Kooperation mit Landwirten
of land
purchase
Ankauf & Aufforstung
& afforestation
Groundwater protection
groundwater protection
purchase of land &
afforestation
cooperation with
farmers
organic farming
Information centres
Tree and nature teaching trail
in Holdorf
Organic farm „Bakenhus“
in Großenkneten
Service centre in the T.A.Z.
in Oldenburg
Freshwater teaching trail
in Nethen
Kaskade-information centre
in Diekmannshausen
Old waterworks Langeoog
Island Langeoog
Freshwater lens
rainfall
clay
sand +
salt water
Ökologischer Landbau
North Sea
Kooperation mit Landwirten
Ankauf & Aufforstung
evaporation
wadden sea
freshwater lens
well
sand +
freshwater
clay
clay
Water protection area
Main problems
1. unsecure old deposition of harmful
substances
Endangering
old domestic garbage dump
well with hydrocarbons
Main problems
1. unsecure old deposition of harmful
substances
2. stability of freshwater lens
Jan 03
Jan 02
Jan 01
Jan 00
Jan 99
Jan 98
Jan 97
Jan 96
Jan 95
Jan 94
Jan 93
Jan 92
Jan 91
Jan 90
chloride concentration [mg/l]
Chloride concentration
Waterworks Langeoog: chloride concentration
150
average of all conveying wells in mg/l
100
50
0
Main problems
1. unsecure old deposition of harmful
substances
2. stability of freshwater lens
3. danger of flooding
Endangered catchment area
catchment area
Endangered catchment area
Questions?
Thank you for your attention!