Case study:Conservation of alluvial

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Location: 46° 1' 23.16" N, 18° 41' 22.16" E

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity
Country	Hungary
Main contact forename	Viktoria
Main contact surname	Siposs
Main contact user ID
Contact organisation	WWF Hungary, Danube Drava National Park Directorate
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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(affects all case studies in this subcatchment)

Catchment

River basin district	Danube
River basin	Danube

Subcatchment

River name	Sava River
Area category	more than 10000 km²
Area (km2)
Maximum altitude category	500 - 1000 m
Maximum altitude (m)	833833 m <br />0.833 km <br />83,300 cm <br />
Dominant geology	Calcareous
Ecoregion	Dinaric Western Balkan, Alps
Dominant land cover
Waterbody ID

Other case studies in this subcatchment: Hainburg River Restoration, INTERREG MED WETNET - Memoradum on Participation in Wetland Conservation in Ljubljansko Barje Nature Park, Marsh protection in Egyek–Pusztakócs, National Park Danube-Auen, Regelsbrunner Aue, Renaturation of Stržen's riverbed on intermittent Cerknica Lake, The Bulgarian Wetlands Restoration and Pollution Reduction Project, Witzelsdorf Pilot Project

Site

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Name	Szabadság-sziget (Liberty Island)
WFD water body codes	AEP445
WFD (national) typology
WFD water body name
Pre-project morphology	Artifical oxbow completely cut-off from the main river; Silted up significantly
Reference morphology	Sidearm
Desired post project morphology
Heavily modified water body	No
National/international site designation	EU - Special Protected Area
Local/regional site designations	Natura 2000; National Park
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology	Permanent lentic
Dominant substrate	Sand, Gravel
River corridor land use	Intensive agriculture, Woodland, Urban
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category	5 - 10 m
Average bankfull channel depth (m)
Mean discharge category	more than 1000 m³/s
Mean annual discharge (m3/s)	28232,823 m³/s <br />2,823,000 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)	30003,000 m <br />3 km <br />300,000 cm <br />
Project started
Works started
Works completed
Project completed
Total cost category	1000 - 5000 k€
Total cost (k€)	17951,795 k€ <br />1,795,000 € <br />
Benefit to cost ratio
Funding sources	LIFE+ (LIFE07 NAT/H/000320) (http://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.createPage&s_ref=LIFE07%20NAT/H/000320)

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design			WWF Hungary, Danube-Drava National Park Directorate, Municipality of Mohács town	Viktoria	Siposs
Stakeholder engagement and communication			Lower-Danube-Valley Water Management Directorate, WWF Hungary
Works and works supervision	1000 - 5000 k€	10751,075 k€ <br />1,075,000 € <br />	WWF Hungary, Cargill Hungary, Transdanubian Regional Waterworks Public Company (DRV Zrt.)
Post-project management and maintenance			Danube Drava National Park Directorate	Sandor	Kövesi
Monitoring			Danube Drava National Park Directorate

Reasons for river restoration

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Mitigation of a pressure
Hydromorphology	Quantity & dynamics of flow, Substrate conditions
Biology	Fish: Species composition
Physico-chemical	Nutrient concentrations
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Dredging, Removal of rock-fill weir, Relocation of the drinking water pipes
Floodplain / River corridor	Removal of alien and invasive tree species
Planform / Channel pattern
Other
Non-structural measures
Management interventions	Protection of the island, Ensuring biodiversity
Social measures (incl. engagement)	Recreation, Improvement of drinking water quality, Land purchase
Other	Information provision, Consultation, Participation in works

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
Quantity & dynamics of flow	Yes	Yes	No	Yes	No	Awaiting results

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Fish: Species composition	No	No	Yes	No	No	Awaiting results
Invertebrates: Taxonomic composition	No	No	Yes	No	No	Awaiting results

Physico-chemical quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Nutrient concentrations	No	No	No	Yes	No	Awaiting results

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

Monitoring documents

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Image gallery

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The Danube River

Szabadság-sziget (Liberty Island)

During works_1

During works_2

Additional documents and videos

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Additional links and references

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Link

Description

http://okologia.mta.hu/en

Centre for Ecological Research HAS - The institute network of the Hungarian Academy of Sciences is set to produce values for both national and international success in Hungarian and universal science. The Centre's primary aim is to play a fundamental role in promoting the common weal and in building the foundation for the future through valuable scientific achievements based on highly promising discovery research. The Centre consists of three institutes, the Balaton Limnological Institute, the Danube Research Institute and the Institute of Ecology and Botany.

Supplementary Information

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