General
National Id
Slovenia_02
Summary
The innovative ecoremediation (ERM) system, which consist in a sedimentation pond for the deposition of coarse particles and reduction of current flow velocity, for treatment of the polluted tributary of Glinščica, Slovenia, was installed in 2006 by Limnos Itd.
NUTS Code
Zahodna Slovenija
RBD code
SI_RBD_1
Transboundary
0
Data provider
REC
Source(s)
NWRM(s) implemented in the case study
Longitude
14.45249
Latitude
46.0761
Site information
Climate zone
cool temperate moist
Mean rainfall
1343
Mean rainfall unit
mm/year
Average temperature
9,69999980926514
Type
Case Study Info
Light or indepth?
Light
Average slope range
0-1%
Vegetation class
Marsh vegetation
Monitoring maintenance
Monitoring impacts effects
1
Monitoring location
In-Stream
Monitoring parameters
Hydro-morphological, physical and chemical, in addition to water and sediments' toxicity, reed productivity and ERM system's plant diversity.
Monitoring upstream station
The water level was measured at Inflow and at additional 6 sampling points in the VDD.
Monitoring downstream station
Outflow of the VDD and the outflow of the RBM
Performance
Performance impact estimation method
Catchment outlet
Performance impact estimation information
pH, EC, DO and T were measured with portable meters WTW Multiline P4 according to Standard Methods. Hydraulic residence time (HRT) was measured with the tracer test with CaCl on 25.7.2007 and 26.7.2007. And statistical analyses.
Design & implementations
Application scale
Field Scale
Installation date
2006-01
Performance timescale
< 1 year
Size
225
Size unit
m2
Inflow volume
260
Inflow volume unit
m3/day
Public consultation
1
Design contractual arrangement
| Arrangement type | Responsibility | Role | Comments | Name |
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Design consultation activity
| Activity stage | Key issues | Name | Comments | |
|---|---|---|---|---|
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Improved public acces
|
Design land use change
| Land use change type |
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Design authority
| Authority type | Role | Responsibility | Name | Comments | |
|---|---|---|---|---|---|
Lessons, risks, implications...
Key lessons
The research showed regularly maintained ERM system efficiently decreased pollutants in the tributary of Glinščica and that combination of vegetated ditch and meandered stream for this purpose is an adequate and promising technology that can be further developed.
Success factor(s)
| Success factor type | Success factor role | Comments |
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Financing
| Financing type | Comments |
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Driver
| Driver type | Driver role | Comments |
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Financing share
| Financing share type | Share | Comments |
|---|
Policy, general governance and design targets
Policy description
Riparian development, pollution incident
Policy target
| Target purpose | |
|---|---|
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Runoff control
|
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Pollutants Removal
|
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Improved Biodiversity
|
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Oher Societal Benefits
|
Policy pressure
| Pressure directive | Relevant pressure |
|---|
Policy area
| Policy area type | Policy area focus | Name | Comments |
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Policy impact
| Impact directive | Relevant impact |
|---|
Policy wider plan
| Wider plan type | Wider plan focus | Name | Comments |
|---|
Policy requirement directive
| Requirement directive | Specification |
|---|
Socio-economic
Costs capital information
The cost was 100 Euro/m2 for investment
Costs operation maintenance
Operation is about 30-50 Euro/m2/year
Ecosystem impact climate regulation
Not relevant for the specific application
Biophysical impacts
Information on retained water
118.7 m3
Ecosystem erosion control
0
Information on Ecosystem erosion control
Erosion increased
Water quality overall improvements
Positive impact-WQ improvement
Information on Water quality overall improvements
The results showed efficient removal of BOD5 (9%), organic N (24%), ammonia (7%), nitrites (84%), nitrates (68%), total N (40%) and total P (3%) in the entire ERM system in the third season. Vegetated ditch was efficient in removal of ammonia (38%), nitrites (91%) and nitrates (63%) and meandered stream was efficient in removal of total P (10%). With the exception of suspended and dissolved solids, pollutants concentrations at the end of the ERM system stayed within the permitted levels for outflow. The results showed the entire ERM system to be more efficient in removal of nitrites and ammonia in season 2008/2009 compared to previous year. Removal of sediments from the pond proved to be essential for efficiency of vegetated ditch, since the ditch reached higher efficiency for almost all parameters after maintenance work in the summer 2008
Water quality Improvements Phosphorus (P)
3
Water quality Improvements (P) unit
% reduction pf pollutant
Water quality Improvements Nitrogen (N)
40
Wq Improvements n unit
% reduction pf pollutant
Water quality Improvements (TSS)
SS increased
Soil quality overall soil improvements
Negative impact-SQ deterioration
