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Kleine Erlauf
(Austria)
1.
Location.
2.
Descriptive data for study catchment
|
Catchment area: |
169 Km2 |
| Stream
length: |
34.5 Km |
| Climate: |
Continental |
| Annual
rainfall: |
NA |
| Mean
annual discharge at river mouth: |
2.7 m3/s |
| Altitudinal
range headwater to river mouth: |
581 m (850 -
269, 16.8 m/km) |
| Population: |
NA |
| Lithology: |
limestone,
sandstone |
| Land
uses: |
pastureland,
agriculture, forest, urban |
3.
Descriptive Data for Study Subcatchment
(catchment defined by WWTP)
|
Catchment
area: |
42 km2 |
| Stream
length: |
9.5 km |
| Annual
rainfall: |
NA |
| Mean
annual discharge before WWTP effluent: |
0.25 m3/s |
| Altitudinal
range from headwater to WWTP effluent: |
450 m (850 - 400) |
| Population: |
NA |
| Distribution
of population: |
villages |
| Lithology: |
limestone |
| Land
uses: |
pastureland,
forest, agriculture, urban |
Wastewater treatment
plant
4.
Wastewater Treatment Plant
(at study site: Gresten WWTP)
Geographic
location:
|
15°01'23" E, 47°59'32" N |
Altitude:
|
400 m a. s. l. |
Origin
of sewage inputs to WWTP:
|
urban |
Equivalent
drained population:
|
2421 equiv inhab/day (potential: 4000) |
Type
of nutrient treatment:
|
none |
Treated
outflow discharge:
|
0.006 m3/s (480 m3/day) |
Design
outflow discharge:
|
0.009 m3/s (800 m3/day) |
COD:
|
36 mg O2/L |
BOD:
|
<3 mg O2/L |
Suspended
solids:
|
NA |
Conductivity:
|
810 µS/L |
N:
|
13 mg/L |
| P: |
6 mg/L |
| Dissolved
oxygen: |
NA |
5.
Descriptive data for experimental reach
(data
for the reference subreach, upstream of WWTP effluent)
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Morphology
-
Water
chemistry
-
Biological
communities
-
Dominant
strata and species of riparian vegetation:
Salix sp., Fraxinus sp., Sambucus sp.
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Dominant
aquatic primary producers: Filamentous algae
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Macroinvertebrates: Chir., Hydropsych., Rhyacophil., Simul., Baet., Ephemerell., Elmidae
-
Dominant
fishes: NA
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Upstream reach
Downstream reach
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