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Lézat
(Lèze stream, France)
1.
Location
.
2.
Descriptive data for study catchment
|
Catchment area: |
350 km2 |
| Stream
length: |
70 km |
| Climate: |
Oceanic |
| Annual
rainfall: |
500 - 1000 mm/year |
| Mean
annual discharge at river mouth: |
1.89 m3/s |
| Altitudinal
range headwater to river mouth: |
549 m (704 - 155) |
| Population: |
NA |
| Lithology: |
Upper reaches : calcareous karst;
lower reaches: molassic |
| Land
uses: |
Upper reaches : grassland and
forest; lower reaches : agriculture |
3.
Descriptive Data for Study Subcatchment
(catchment defined by WWTP)
|
Catchment
area: |
237 km2 |
| Stream
length: |
NA |
| Annual
rainfall: |
600 - 1000 mm/year |
| Mean
annual discharge before WWTP effluent: |
1.31 m3/s |
| Altitudinal
range from headwater to WWTP effluent: |
199 - 704 m |
| Population: |
NA |
| Distribution
of population: |
villages and dispersed |
| Lithology: |
Upper reaches : calcareous karst;
lower reaches: molassic |
| Land
uses: |
Upper reaches : grassland and
forest; lower reaches : agriculture |
4.
Wastewater Treatment Plant
Geographic
location:
|
NA |
Altitude:
|
199 m a. s. l. |
Origin
of sewage inputs to WWTP:
|
urban |
Equivalent
drained population:
|
2500 equivalent inhabitants/day |
Type
of nutrient treatment:
|
NA |
Treated
outflow discharge:
|
0.0058 m3/s (500 m3/day) |
Design
outflow discharge:
|
NA |
COD:
|
mg O2/L |
BOD:
|
300 mg O2/L (150 kg/day) |
Suspended
solids:
|
150 mg/L (75 kg/day) |
Conductivity:
|
NA |
N:
|
NA |
| P: |
NA |
| Dissolved
oxygen: |
NA |
5.
Descriptive data for experimental reach
(data
for the reference subreach, upstream of WWTP effluent)
-
Morphology
-
Water
chemistry
-
Biological
communities
|
.
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