Ecological state of lake during restoration measures “Lake management” Prepared by: Hasnain Ali Pabiszczak Bogna Prisacaru Florin Constantin Strugariu Alexandru Suszczyńska Marcelina Under Supervision of: Dr. Wilhelm Windhorst Poznań and Wągrowiec30 June -14 July 2013
Contents • Introduction • Need for Lake Management • Results of this year (including comparison to previous years) previous years) • Conclusion & Recommendations
Introduction • The Water Framework Directive (WFD) is a key initiative aimed at improving water quality throughout the EU. It applies to rivers, lakes, groundwater, and coastal waters. • Lake Durowskie is a very important element of the local community of element of the local community of Wągrowiec Wągrowiec • During previous surveys, conducted since 2009, Lake Durowskie has been shown to be in a poor ecological state due to eutrophication. Since 2009, the lake has been the • target of a complex restoration programme
Need for Lake Management • Lake management Working groups aims on assessing the current condition of the Lake Durowskie and suggesting workable solutions for improving the ecological state of the lake. • It uses results from other working groups of 2013 Summer School as well as questionary surveys and proposes preventive/ mitigative measures.
Need for Lake Management • Lake Durowskie is of interest to many categories of people from Wągrowiec, from fishermen to motor boat enthusiasts. • With ever increasing recreational use and growing populations residing near and along, lake can suffer from small and large cumulative impacts.
Results of Biological and Physics-Chemical Monitoring (evaluations of lake quality) Indicators of quality 2011 2012 2013 Physico - Chemical Macrophytes Macrophytes Algae (Noth) Algae (South) Macroinvertebrates Fish assemblages N/A N/A Quality degraded Quality improved No change
Survey Results
Survey Results (Locals) What do you think about the reclamation of the Lake? Yes its needed No it's not needed Don't know 33% 64% 3%
Survey Results (Locals) Would you be willing to pay money for the reclamation? yes no 38% 38% 62%
Survey Results (Tourist) Main Activities (Tourist) 40 35 30 25 20 No. 15 10 5 0 sport resting at the Aquapark restaurant/pub stay at home lake Activities
Survey Results (Tourist) Why W ą growiec? 30 25 20 15 10 5 0 Natural beauty Recreation Other
Survey Results (Fishermen) Fishing frequency 14 12 10 8 8 Fishing frequency 6 4 2 0 Daily Biweekly Weekly Monthly
Survey Results (Fishermen) Fish Catch (Species) 25 20 15 15 Species 10 5 0 Carp Pike Roach Bleak Bream Perch Ell Tench White Bream
Survey Results (Fishermen) How do you rate the water quality for fishing? 12 10 8 6 Ranking 4 2 0 1 2 3 4 5
Factors Contributing External Factors • Inflow (water containing high nutrients from Lake Kobyleckie) Lake Kobyleckie) Internal Factors • Erosion from Surface Runoff – Furrow erosion
Factors Contributing • Fishing – By Adding Nutrients (Fishing baits) – Jetty’s effecting Macrophytes belt along shoreline – Direct fishing from lake bank bank Intensified Leisure Activities • – Strong waves from motor boats effecting Macrophytes belt. – Mountain biking along the lake (along with severe rainfall causes mass erosion events.
Conclusion and Recommendations • Round table capacity building (Public awareness campaign). • Majority of the locals sustain the rehabilitation of the lake. • Educate fishermen to reduce use of fishing bait • Allow more fishermen to use private jetties to reduce impact on macrophytes belts ? • Zoning of lake in North and South (Limit activities in the North of Lake)
Conclusion and Recommendations • Change route of biking along the lake to limit erosion events. • Construct jetties to reduce foot print on macrophytes belt. macrophytes belt. • Ban use of motor boat in certain areas ? • Motor boat rides to be limited to reduce effect on macrophytes
Thank you! Danke! Danke! Dziękuję Dziękuję Multumim!
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