Case study:Restore riparian floodplain habitats maintained in reserve "Dolna topchia" and run off on his sleeve "Malka Tundzha"

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Location: 42° 13' 48.29" N, 26° 33' 58.88" E

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity
Country	Bulgaria
Main contact forename	Penka
Main contact surname	Nacheva
Main contact user ID
Contact organisation	Regional Inspectorate of Environment and Water – Stara Zagora
Contact organisation web site	http://www.stz.riew.e-gov.bg/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

"Dolna topchia" Reserve

Project summary

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Design and construction of hydraulic structures on river Tundzha for recovery of riparian wetland biotopes maintained in reserve "Dolna topchia" and run off on his sleeve "MalkaTundzha." The main objective of the project is to restore the conditions necessary for the maintenance of riparian biotopes. Main habitat is riparian floodplain forest - habitat code 91F0. There is good population of spring snowflake. The target of the project area is maintained reserve category " Dolna topchia " and is part of the Natura 2000 network –protected area "Reka Tundzha 2." To achieve the objective was built weir on the Tundzha river and channel with length of 900 m. The water intake includes the diversion weir, stilling, primitive channel, fish passage and water intake facility. Through the construction of channel and water intake facility is carried out gravity connection between the river and sleeve " MalkaTundzha" by drainage channel along an existing irrigation canal that expanding, allowing hydration of 467.6 ha of habitat 91F0. The channel is lined and the bed of the "MalkaTundzha” will supply the groundwater in the area of the reserve. After the feedback between " MalkaTundzha " and river along the southern border of the reserve "Dolna topchia" will be implemented consistent circulation of water in reserve.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	East Aegean
River basin	Tundzha

Subcatchment

River name	Tundzha river
Area category	1000 - 10000 km²
Area (km2)
Maximum altitude category	Less than 100 m
Maximum altitude (m)
Dominant geology	Siliceous
Ecoregion	Eastern Balkan
Dominant land cover	Woodland
Waterbody ID

Other case studies in this subcatchment: Restore riparian floodplain habitats maintained in reserve "Dolna topchia" and run off on his sleeve "Malka Tundzha"

Site

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Name	protected area "Tundzha river - 2" BG 0000195
WFD water body codes	BG3TU500R016
WFD (national) typology	TR20
WFD water body name
Pre-project morphology	Sinuous
Reference morphology	Sinuous
Desired post project morphology
Heavily modified water body
National/international site designation	EU - Special Area of Conservation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology	Artificially regulated
Dominant substrate	Silt
River corridor land use	Woodland
Average bankfull channel width category	10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category	2 - 5 m
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)	3232 m³/s <br />32,000 l/s <br />
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)
Project started
Works started
Works completed
Project completed
Total cost category	100 - 500 k€
Total cost (k€)
Benefit to cost ratio
Funding sources	Enterpise for Management of Environmental Protection Activities

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design				Lyutskan	Tanev
Stakeholder engagement and communication
Works and works supervision
Post-project management and maintenance
Monitoring

Reasons for river restoration

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Mitigation of a pressure
Hydromorphology	Structure & condition of riparian/ lake shore zones
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor	Creation of wetlands
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other	Information provision

Monitoring

Hydromorphological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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Physico-chemical quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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Any other monitoring, e.g. social, economic

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Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Public awareness of river						Improvement

Monitoring documents

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Image gallery

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Dolna topchia Reserve_1

Dolna topchia Reserve_2

Tundzha river_1

Tundzha river_2

Tundzha river_3

Additional documents and videos

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Additional links and references

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Link	Description
http://www.stz.riew.e-gov.bg/	Regional Inspectorate of Environment and Water Stara Zagora

Supplementary Information

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