drinking water supply on langeoog - situation and problems holger hinnah oowv - the water board of...
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![Page 1: Drinking water supply on Langeoog - situation and problems Holger Hinnah OOWV - The water board of Oldenburg and East Frisia](https://reader035.vdocuments.site/reader035/viewer/2022081721/551627f855034694308b5c88/html5/thumbnails/1.jpg)
Drinking water supply on Langeoog-
situation and problems
Holger HinnahOOWV - The water board of
Oldenburg and East Frisia
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The OOWV
institution with legal standing
founded in 1948 as a water and soil board
since 1999: new department sewage disposal
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OOWV- Area
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The OOWV in figuresgeneral company
year of foundation 1948
clients ca. 1 Mill.
employees 651
thereof trainee 30
total assets
(drinking water and sewage) ca. 500 Mill. EUR
Stand:1/2004
2area 7.850 km
sewage disposal since 1999
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Fields of activity
drinking water supply
groundwater protection
assumption of further tasks possible
sewage disposal
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Department of drinking water waterworks
waterworks
water storage tank
& water storage tanks
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Department of drinking waterin figures
members9 rural districts2 cities1 municipality
length of pipe system 13.000 km
accesses to households 320.000
clients 880.000
drinking water release 69 Mill. m / year3
capacity of the 15 waterworks 251.000 m / day3
Stand: 4/2003
consumption per head 121 l / day
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An
kau
f &
Au
ffo
rstu
ng
Ko
op
erat
ion
mit
Lan
dw
irte
n
Öko
log
isch
er L
and
bau
purchase of land &
afforestation
cooperation with
farmers
organic farming
Groundwater protection
publicity
pur
chas
e o
f la
nd
& a
ffore
stat
ion
Coo
pera
tion
with
far
mer
s
Org
anic
far
min
g
groundwater protection
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Information centres
Old waterworks Langeoog
Kaskade-information centrein Diekmannshausen
Freshwater teaching trail in Nethen
Service centre in the T.A.Z.in Oldenburg
Organic farm „Bakenhus“in Großenkneten
Tree and nature teaching trailin Holdorf
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Island Langeoog
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An
kau
f &
Au
ffo
rstu
ng
Ko
op
erat
ion
mit
Lan
dw
irte
n
Öko
log
isch
er L
and
bau
Freshwater lens
rainfall
evaporation
North Sea
clay
clay
clay
sand + salt water
freshwater lens
sand +freshwater
wadden sea
well
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Water protection area
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Main problems
1. unsecure old deposition of harmful substances
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Endangering
old domestic garbage dump
well with hydrocarbons
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Main problems
1. unsecure old deposition of harmful substances
2. stability of freshwater lens
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Chloride concentrationWaterworks Langeoog: chloride concentration
average of all conveying wells in mg/l
0
50
100
150
Jan
90
Jan
91
Jan
92
Jan
93
Jan
94
Jan
95
Jan
96
Jan
97
Jan
98
Jan
99
Jan
00
Jan
01
Jan
02
Jan
03
chlo
rid
e co
nce
ntr
atio
n [
mg
/l]
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Main problems
1. unsecure old deposition of harmful substances
2. stability of freshwater lens
3. danger of flooding
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Endangered catchment area
catchment area
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Endangered catchment area
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Questions?
Thank you for your attention!