General
National Id
Greece_01
Site name
Xiropotamos River Basin
Light or indepth?
Light
NUTS Code
Δυτική Μακεδονία (Dytiki Makedonia)
RBD code
GR09
Transboundary
0
Data provider
Maggie Kossida, IACO
NWRM(s) implemented in the case study
Site information
Climate zone
warm temperate dry
Mean rainfall
609,799987792969
Mean rainfall unit
mm/year
Average temperature
11,6000003814697
Mean runoff
1,92999994754791
Mean runoff unit
600 - 750 mm
Type
Case Study Info
Performance
Performance impact estimation method
Unknown
Performance impact estimation information
Non applicable
Design & implementations
Application scale
River Basin
Lifespan
25
Performance timescale
1 - 4 years
Area (ha)
2800
Area subject to Land use change or Management/Practice change (ha)
2800
Design capacity description
The retention measures are based on eliminating soil erosion and decreasing the stream gradient, though small scale dams. The maximum volume of runoff water that can be retained is not determined in the study.
Constraints
The constrains include the implementation of such measures in protected areas and the limitations that are for this reason necessary
Favourable preconditions
The necessary preconditions are the climate conditions and the hydrology of the area.
Design contractual arrangement
| Arrangement type | Responsibility | Role | Comments | Name |
|---|
Design consultation activity
| Activity stage | Key issues | Name | Comments |
|---|
Design land use change
| Land use change type |
|---|
Design authority
| Authority type | Role | Responsibility | Name | Comments |
|---|---|---|---|---|
Lessons, risks, implications...
Key lessons
The retention measures are based on the principles of eliminating soil erosion though afforestion and other planting measures. Also the decrease of the stream gradient, though small scale dams has decreased stream flow velocity and sendiment retention. Thus, the risk of flash floods is minimised in the downstream area and the biodiversity of the area is increased. Water retention management can be implemented through improvement of the soil and changes in the stream flow.
Success factor(s)
| Success factor type | Success factor role | Comments |
|---|---|---|
|
Attitude of decision makers
|
main factor
|
Financing
| Financing type | Comments |
|---|---|
|
National funds
|
Driver
| Driver type | Driver role | Comments |
|---|---|---|
|
Other
|
main driver
|
The improved mountainous hydrology of the area.
|
Financing share
| Financing share type | Share | Comments |
|---|
Policy, general governance and design targets
Policy description
The specific interventions aim at slowing down the stream velocity with retaintion dams and reduction of stream gradient. Additionally the application aimed at reducing soil erosion through afforestation and planting in order to improve the soil properties and mitigate flood risk.
Part of wider plan
0
Policy target
| Target purpose |
|---|
|
Runoff control
|
|
Peak-flow reduction
|
|
Erosion Control
|
|
Improved Biodiversity
|
Policy pressure
| Pressure directive | Relevant pressure |
|---|
Policy area
| Policy area type | Policy area focus | Name | Comments |
|---|
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
Direct benefits information
The direct benefits include the reduction of the flood risk, the mitigation of soil erosion, the improvement of the micro-environment as well as the aesthetic restoration of the area.
Ancillary benefits information
Ancillary benefits include the increase of infiltration / percolation and recharge of aquifers; this water can be used for different purposes (e.g agriculture) as well as for ecosystem services. Also the aesthetic improvement of the area has positive societal impacts
Costs investment information
The measures have not been implemented yet in the area
Costs operation maintenance
The measures have not been implemented yet in the area
Costs total information
The measures have not been implemented yet in the area
Ecosystem improved biodiversity
1
Information on Ecosystem improved biodiversity
The measures are expected to have positive impact on the biodiversity of the area
Information on Ecosystem provisioning services
Not relevant for this application
Ecosystem impact climate regulation
No information available
Information on Ecosystem impact climate regulation
The micro-climate and micro-environment is expected to be positively affected by the implemented measures; however the degree of impact is not assessed
Biophysical impacts
Information on retained water
The volume of retained water was increased due to the small scale dams as well as the improvement in the area vegitation after the afforestation/plantation
Information on increased water storage
The measures slowed down the stream flow and increased the retaining of water for longer period enabling the infiltration/percolation and recharge of aquifers.
Information on runoff reduction
The measures improved the runoff control as the velocity of water volume was reduced leading to decreasing the intensity and frequency of floods.
Information on Water quality overall improvements
Not relevant for this application
Soil quality overall soil improvements
Positive impact-SQ improvement
Information on Soil quality overall soil improvements
The measures have a direct impact on the overall soil quality as afforestation / plantation of the area succeeds in improving the soil properties leading to increased soil storage capacity. Soil erosion have reduced the soil capacity to store and retain water thus an improvement in the soil properties (e.g. soil moisture) can have a positive impact on the soil infiltration capacity.
The decision makers approved the relevant environmental impact assessment