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Gurri
(Catalonia, Spain)
1.
Location.
2.
Descriptive data for study catchment
|
Catchment area |
211.8 Km2 |
| Stream
length: |
29.6 Km |
| Climate: |
Mediterranean |
| Annual
rainfall: |
720 mm/year |
| Mean
annual discharge at river mouth: |
m3/s |
| Altitudinal
range headwater to river mouth: |
1140 - 433 m (707
m) |
| Population |
inhabitants |
| Lithology: |
|
| Land
uses: |
|
| |
m2 |
percent |
| Water |
67500 |
0.03 |
| Roads |
5375700 |
2.15 |
| Low
density urban |
4000500 |
1.60 |
| High
density urban |
5961600 |
2.39 |
| Industrial |
3987900 |
1.60 |
| non-irrigated
agriculture |
121469400 |
48.69 |
| irrigated
agriculture |
277200 |
0.11 |
| Woodlands
and pastures |
20290500 |
8.13 |
| Broadleaf
evergreens |
11610900 |
4.65 |
| Broadleaf
deciduous |
29193300 |
11.70 |
| Conifers |
40525200 |
16.24 |
| Sparse
vegetation |
6723900 |
2.70 |
| TOTAL |
249483600 |
100.00 |
3.
Descriptive Data for Study Subcatchment
(catchment defined by WWTP)
|
Catchment
area: |
37.7 km2 |
| Stream
length: |
14.3 km |
| Annual
rainfall: |
720 mm/year |
| Mean
annual discharge before WWTP effluent: |
m3/s |
| Altitudinal
range from headwater to WWTP effluent: |
1140 - 407 m (633 m) |
| Population: |
inhabitants |
| Distribution
of population: |
|
| Lithology: |
|
| Land
uses: |
|
4.
Wastewater Treatment Plant
Geographic
location:
|
2° 16' 39.0377", 41° 52' 56.5525" |
Altitude:
|
503 m a. s. l. |
Origin
of sewage inputs to WWTP:
|
small town |
Equivalent
drained population:
|
11666 equivalent inhabitants |
Type
of nutrient treatment:
|
none |
Treated
outflow discharge:
|
|
Design
outflow discharge:
|
0.023 m3/s (2000 m3/day) |
COD:
|
mg O2/L |
BOD:
|
mg O2/L |
Suspended
solids:
|
|
Conductivity:
|
|
N:
|
mg/L |
| P: |
mg/L |
| Dissolved
oxygen: |
|
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:
Populus canadiensis, Alnus glutinosa,
Rubus ulmifolius
-
Dominant
aquatic primary producers: biofilm and
filamentous algae
-
Macroinvertebrates: Diptera
(Chironomidae, Simulidae), Ephemeroptera (Baetidae,
Caenidae), Coleoptera (Dytiscidae), Crustacea
(Copepoda, Ostracoda, Cladocera), Hydracarina,
Molusca (Hydrobiidae), Oligochaeta (Naididae)
-
Dominant
fishes: none
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