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.Erpe
(Germany)
1.
Location.
2.
Descriptive data for study catchment
|
Catchment area |
211 Km2 |
| Stream
length: |
29 Km |
| Climate: |
sub-continental |
| Annual
rainfall: |
550 mm/year |
| Mean
annual discharge at river mouth: |
1.2 m3/s |
| Altitudinal
range headwater to river mouth: |
31 m (1.1%) |
| Population |
63.000 inhabitants |
| Lithology: |
glacial sands |
| Land
uses: |
arable land,
forest, urban area |
3.
Descriptive Data for Study Subcatchment
(catchment defined by WWTP)
|
Catchment
area: |
207 km2 |
| Stream
length: |
20 km |
| Annual
rainfall: |
550 mm/year |
| Mean
annual discharge before WWTP effluent: |
0.4 m3/s |
| Altitudinal
range from headwater to WWTP effluent: |
25 m |
| Population: |
50.000 inhabitants |
| Distribution
of population: |
cities, villages |
| Lithology: |
glacial sands |
| Land
uses: |
arable land,
forest, urban area |
4.
Wastewater Treatment Plant
Geographic
location:
|
13°40´ E / 52°29´ N |
Altitude:
|
38.4 m a. s. l. |
Origin
of sewage inputs to WWTP:
|
urban |
Equivalent
drained population:
|
220.000 equivalent inhabitants/day |
Type
of nutrient treatment:
|
nitrification, denitrification, biological
phosphate elimination, chemical phosphate precipitation |
Treated
outflow discharge:
|
0.51 m3/s |
Design
outflow discharge:
|
NA |
COD:
|
43 mg O2/L |
BOD:
|
4 mg O2/L (BOD 5 days) |
Suspended
solids:
|
7 mg/L |
Conductivity:
|
1500 - 1700 µS/cm |
N:
|
21.8 mg/L |
| P: |
0.77mg/L |
| Dissolved
oxygen: |
NA |
5.
Descriptive data for experimental reach
(data
for the reference subreach, upstream of WWTP effluent)
-
Morphology
-
Water
chemistry
-
Biological
communities
-
Dominant
strata and species of riparian vegetation:
Quercus forest
-
Dominant
aquatic primary producers: benthic
algae, macrophytes
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Macroinvertebrates: Chironomidae
-
Dominant
fishes: NA
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