Case study:Creation of spawning ground for Baltic salmon, anadromous brown trout and river lamprey at Veneküla rapid, river Pirita

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Location: 59° 26' 3.78" N, 24° 55' 50.76" E

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Project overview

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Status	Complete
Project web site
Themes	Economic aspects, Fisheries, Habitat and biodiversity, Hydromorphology, Monitoring
Country	Estonia
Main contact forename	Martin
Main contact surname	Kesler
Main contact user ID
Contact organisation	Estonian Marine Institute, University of Tartu
Contact organisation web site	http://www.sea.ee
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Project summary

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Works included: Breaking the bedrock (>100m3), placing spawning gavel (>110 m3) to the created pool and placing large boulders around the created spawning ground to provide shelter for the fish.

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Groundbreaking work in process

Excavating the pool from excess rock

Gravel emplacement

Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name Veneküla rapid WFD water body codes WFD (national) typology WFD water body name River Pirita Pre-project morphology Limestone bedrock Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Estonia - Koelmuala Local/regional site designations Protected species present Yes Invasive species present No Species of interest Baltic salmon (Salmo salar), anadromous brown trout (Salmo trutta) and river lamprey (Lampetra planeri) Dominant hydrology Riverine Dominant substrate Flat monolithic bedrock River corridor land use Urban Average bankfull channel width category 10 - 50 m Average bankfull channel width (m) Average bankfull channel depth category Less than 0.5 m Average bankfull channel depth (m) Mean discharge category 1 - 10 m³/s Mean annual discharge (m3/s) 5-7"-7" is not declared as a valid unit of measurement for this property. Average channel gradient category 0.01 - 0.1 Average channel gradient 0,72",72" can not be assigned to a declared number type with value 0. Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 20002,000 m <br />2 km <br />200,000 cm <br /> Project started 2007 Works started 2012/07/15 Works completed 2012/08/30 Project completed 2013/09/30 Total cost category 10 - 50 k€ Total cost (k€) Benefit to cost ratio Funding sources 90% covered by EU, Central Baltic INTERREG IV A Programme 2007-2013 and 10% by Estonian Ministry of the Environment Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Stakeholder engagement and communication Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Drinking water storage and supply Hydromorphology Substrate conditions Biology Fish: Abundance Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Excavation of bedrock, Introduction of spawning gravels, Creation of pools, Creation of fish refuge areas Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Fish: Abundance Yes Yes Yes Yes Yes Improvement Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information