General National Id Czech_02 Site name ČernýPotok stream Summary The Nature Conservation Agency of the Czech Republic carried out the retoration of Cerny Potok stream which was based on common principles of stream restoration. The main aim of the restoration was to decrease the volume of the restored stream-beds especially by reducing their depth. Modifications within the channelized stream-bed were not sufficient, therefore new stream-beds were proposed and constructed. They were reconnected with the remains of the original stream course or directed freely to the alluvial meadows. Light or indepth? In-depth The in-depth description of the case study cs-cz-01-final_version.pdf NUTS Code Severozápad RBD code CZ_5000 Transboundary 0 Data provider Jovanka Ignjatovic, REC Source(s) Ecological restoration in Czech Republic NWRM(s) implemented in the case study Stream bed re-naturalization Longitude 13.8905 Latitude 50.734 Site information Climate zone cool temperate dry Mean rainfall 850 Mean rainfall unit mm/year Average temperature 10 Mean runoff 0,0240000002086163 Mean runoff unit 600 - 750 mm Average runoff coefficient 0,25 Type Case Study Info Average slope range 2-5% Vegetation class Grassland Monitoring maintenance Monitoring impacts effects 1 Monitoring location Edge of Field/Plot Monitoring parameters Biodiversity,flow velocity, kind and quantity of sediments and graphic cross section profiles Performance Performance impact estimation method Catchment outlet Performance impact estimation information The two dimensional hydrodynamic SRH-2D model Design & implementations Application scale Field Scale Installation date 2010-02 Lifespan 50 Age 4 Performance timescale 1 - 4 years Area (ha) 7,40000009536743 Area subject to Land use change or Management/Practice change (ha) 7,40000009536743 Size 4 Size unit km Design capacity unit m2 Design capacity description Pools with marshes, 9630 m2 Basis of design Natural overflow in case of Q100 foods (along meandering segment in the alluvium) 74000 m2 Constraints The works would have to be conducted out of the nesting season of birds and metamorphosis of amphibians. Favourable preconditions part of Natura 2000 network Inflow volume 31,7000007629395 Inflow volume unit m3/sec Public consultation 1 Design contractual arrangement Arrangement type Responsibility Role Comments Name Design consultation activity Activity stage Key issues Name Comments Design phase NGOs were involved in the restoration project. Members of the Czech Union for Nature Conservation (Local Chapter Teplice †“ Fergunna) participated in study, project preparation and implementation. Implementation phase The restored site is used for education, and both experts and the public from the Czech Republic and abroad have visited it. Design land use change Land use change type Design authority Authority type Role Responsibility Name Comments Other Initiation of the measure Nature Conservation Agency of the Czech Republic Nature Conservation authority Other Monitoring Czech Union for Nature Conservation National association Other Monitoring Local Chapter Teplice †“ Fergunna CUNC Teplice is one of hundreds of the Czech Union for Nature Conservation, which operates throughout the Czech Republic. A new activity of this organization is to create a basic land league (PS) Fergunna, whose main objective is the protection of nature and landscape of the Ore Mountains. Lessons, risks, implications... Key lessons The successful implementation was enabled by good collaboration between investor, designer and subcontractors Success factor(s) Success factor type Success factor role Comments Specific incentives for stakeholder involvement main factor Specific incentives for stakeholder involvement secondary factor Financing Financing type Comments Other Free State of Saxony, Operational Programme Environment Barrier Barrier type Barrier role Comments Other main barrier there is a rather good scientifc and practical knowledge of how to restore various disturbed habitats preferably in near-natural ways. However, there are still many obstacles to applying this knowledge in practice, ofen due to low interest by target companies, offcials, decisionmakers, and sometimes due to inconvenient legislation. Driver Driver type Driver role Comments Past flooding events main driver Restoration of streams and their floodplains Balancing different objectives secondary driver Restoration of other wetlands in the landscape Financing share Financing share type Share Comments Policy, general governance and design targets Policy description Gradual degradation coused by surface drainage and peat cutting in the headwater peatbog. Part of wider plan 0 Policy target Target purpose Improved Biodiversity Runoff control Groundwater Recharge 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 efect of restoration on the flow rate and delays of the flood waves, as well as on local fauna and fora was monitored as well (Nature Conservation Agency of the Czech Republic, Czech Union for Nature Conservation, Local Chapter Teplice- Fergunna 2007-2011) but only preliminary results are available at present because of a relatively short post-restoration phase. Ancillary benefits information The effect of restoration on the flow rate and delays of the flood waves, as well as on local fauna and fora was monitored as well (Nature Conservation Agency of the Czech Republic, Czech Union for Nature Conservation, Local Chapter Teplice - Fergunna, 2007-2011) but only preliminary results are available at present because of a relatively short post-restoration phase. Costs investment 316000 Costs investment information 2001-2003: €52,000; 2008-2010: €264,000 Costs operation maintenance N/A info Costs total 316000 Costs total information 2001†“2003: €52,000; 2008†“2010: €264,000 Ecosystem improved biodiversity 1 Information on Ecosystem improved biodiversity Already at time of construction it was possible to observe viviparous lizard and the insects 'jumpers' in the pools. Bird species of lapwings (Vanellus vanellus) and the common snipe Gallinago gallinago. Ecosystem provisioning services 0 Information on Ecosystem provisioning services It is not relevant for this application Ecosystem water supply 0 Information on Ecosystem water supply It is not relevant for this application Ecosystem impact climate regulation Not relevant for the specific application Information on Ecosystem impact climate regulation It is not relevant for this application Biophysical impacts Information on retained water Dynamic meandering of the restored stream-bed is being studied, but long-term monitoring is necessary to obtain statistically significant results. Information on increased water storage In a model of a restored stream section of ca. 1 km in length, the delay was up to 2 hours for the 1-year flood compared to the regulated stream and a considerable 20 minutes for a 100-year flood. Information on runoff reduction Very significant effect was recorded on the delay of the flood wave. As a consequence, the peak flow downstream can be reduced due to delayed peak flows from the tributaries Peak flow rate reduction 0,0649999976158142 Peak flow rate reduction unit m3/sec Information on Peak flow rate reduction Only a small effect of the stream restoration on the peak flow was found with the exception of less frequent floods (N1, N2 and N5 peak flows were reduced by only 50-80 l/sec) Water quality overall improvements Neutral impact-no change in WQ status Information on Water quality overall improvements Classified as good and very good condiions. pH = 6-8, high concentrations of dissolved oxygen. Water quality Improvements Copper (Cu) 0,0199999995529652 Water quality Improvements (Cu) unit mg/L Water quality Improvements Zinc (Zn) 0,00499999988824129 Water quality Improvements (Zn) unit mg/L Water quality Improvements water temperature (W T°) 8 Water quality Improvements (W T°) unit o C Soil quality overall soil improvements Not relevant for this application Information on Soil quality overall soil improvements It is not relevant for this application Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL