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Yarqon
(Israel)
1.
Location.
Source: Water Data Banks Project (http://water.usgs.gov/exact/overview/p37.htm)
2.
Descriptive data for study catchment
|
Catchment area |
1805
Km2 |
| Stream
length: |
27.5
Km |
| Climate: |
Mediterranean |
| Annual
rainfall: |
600 mm/year |
| Mean
annual discharge at river mouth: |
0.16
m3/s (but extremely variable) |
| Altitudinal
range headwater to river mouth: |
50 m |
| Population |
750.000
inhabitants |
| Lithology: |
soft |
| Land
uses: |
1.
Agriculture, 2. Urban, 3. Industry, 4. Comercial, 5. Roads
and infra-structure |
Source: Water Data Banks Project (http://water.usgs.gov/exact/overview/p37.htm)
3.
Descriptive Data for Study Subcatchment
(catchment defined by WWTP)
|
Catchment
area: |
700 km2 |
| Stream
length: |
7.5
km |
| Annual
rainfall: |
600 mm/year |
| Mean
annual discharge before WWTP effluent: |
0.01
- 0.03 m3/s |
| Altitudinal
range from headwater to WWTP effluent: |
30 m |
| Population: |
150.000
inhabitants |
| Distribution
of population: |
cities
and villages |
| Lithology: |
soft
sediment - alluvial and sand |
| Land
uses: |
agriculture |
4.
Wastewater Treatment Plant
|
Geographic
location:
|
NA |
|
Altitude:
|
NA |
|
Origin of
sewage inputs to WWTP:
|
urban |
|
Equivalent
drained population:
|
NA |
|
Type of
nutrient treatment:
|
none |
|
Treated
outflow discharge:
|
NA |
|
Design
outflow discharge:
|
NA |
|
COD:
|
20 - 75 mg O2/L |
|
BOD:
|
3 - 25 mg O2/L |
|
Suspended
solids:
|
3 - 35 mg/L |
|
Conductivity:
|
1600 µS/cm |
|
N:
|
35 mg/L |
| P: |
8 mg/L |
| Dissolved
oxygen: |
10 - 20 % |
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:
Phragmites australis
-
Dominant
aquatic primary producers: planktonic
algae, biofilm
-
Macroinvertebrates: Oligochaeta,
Chironomidae, Cladocera, Ostracoda
-
Dominant
fishes: Cichlidae - Tilapia zillii; Cyprinidae -
Cyprinus carpio, Acanthobrama telavivensis
|
.
Yarqon River near tel-Aviv-Yafo (Source:
Water Data Banks Project (http://water.usgs.gov/exact/overview/p37.htm))
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