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Antti Kaseva LIETO 3.11.2011 Active wetlands project & water quality measurement techniques.

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Presentation on theme: "Antti Kaseva LIETO 3.11.2011 Active wetlands project & water quality measurement techniques."— Presentation transcript:

1 Antti Kaseva LIETO 3.11.2011 Active wetlands project & water quality measurement techniques

2 Topics Active wetlands General information Project idea Coals Role of TUAS Practice Situation Preliminary experiences Water quality measurement Water sampling & online water quality monitoring Examples and experiences of few water quality monitoring techniques

3 ACTIVE measures on WETLANDS for decreasing nutrient load in the Baltic Sea

4 Central Baltic INTERREG IV A Programme 2007-2013 Southern Finland– Estonia Sub-programme Project acronym: ACTIVE WETLANDS Priority: 1. Safe and healthy environment Tähän kuva tai kaavio Funding

5 Background Agriculture is the largest anthropogenic source of nutrients (N and P) enhancing eutrophication of the Baltic Sea Constructed wetlands are recognized as a powerful tool to retain nutrients that have leached from arable land. Nutrients that are bond to soil particles are reduced by sedimentation in wetlands Large and thus efficient wetlands are still rare due to their high investment costs Nitrogen components can be reduced by denitrification and assimilation by plants Dissolved P however is retained poorly, if at all The efficiency of small wetlands could be increased? –idea by WWF Finland (wetland projects) Algae blooms in the Baltic Sea. Summer 2008 (

6 Project goals Project aims to work out and promote methods and techniques to enhance nutrient retention in wetlands (hereby entitled "active wetlands) Model biological and economical efficiency of wetlands Increase awareness of the importance of wetlands in decreasing the nutrient load from agriculture.

7 Project organisation Lead Partner: MTT Agrifood Research Finland, Jokioinen, Finland Partners: Finnish Environment Institute (SYKE), Research Department/ Research Programme for Integrated River Basin Management, Helsinki, Finland WWF Finland, Helsinki, Finland Turku University of Applied Sciences (TUAS), Turku, Finland Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Department of Water Management, Tartu, Estonia Estonian Fund for Nature (ELF), Tartu, Estonia

8 Active Wetlands project - work packages and activities - WP1 coordination and management WP2 Small-scale design and engineering of pilot wetlands WP3 Biological and economical models WP4 Communication and awareness

9 Project activities by work packages WP2: Pilot studies and treatments established for wetlands both in Finland and Estonia WP3 : Watershed models of different complexity will be used to assess the wetland effects on a wider scale Economical calculations and modelling are performed in order to assess to costs of wetland construction and maintenance compared to the benefits in nutrient retention WP4 : Communication and awareness of wetlands is enhanced Co-operative transnational development of wetland restoration, conservation and construction is enhanced between Finland and Estonia

10 TUAS and Active wetlands TUAS is primary engaged to implementation of WP2 in Finland in co-operation with MTT TUAS is responsible for: Building up of 1-2 test sites with chemical phosphorus removal systems (autumn 2010) Creating and maintaining online monitoring systems for test sites (autumn 2010) Planning and executing of manual water sampling plan (autumn 2010– autumn 2012) Collect objective data on feasibility of the measures (autumn 2010 )

11 About possible active methods 2 different kind of methods based on chemical phosphorus precipitation have been applied a). Solid ferric sulphate doser (Ferix-3) Ferric sulphate is dosed to stream relative to magnitude of water flow (Ferix-3 to water in ratio 1:30 000) b). Ferric hydroxide granule buffer (Sachtofer PR) Granules origin is in pigment industry Consist of calcium sulphate and iron compounds Water flow is directed slowly through granule buffer

12 Ferix-3 Picture: MTT, Salo, Jansson & Närvänen Principal structure of ferric sulphite doser

13 Doser headpeace (left), solid ferric sulphate (right corner) and doser prototype in the test

14 Active Wetland Pilot site at Lieto Nautela Doser (left) and online water quality monitoring equipment (right corner)

15 Pilot sites in Jokioinen (MTT)

16 Ojainen Pilot site granule buffer Sachtofer granules Pond Water level adjustment Filter size 6 m³

17 Pilot site of granule buffer (left & middle) and ferric hydroxide granules (right corner)

18 Usage of chemicals The chemical precipitation of phosphorus by ferrous and aluminium sulphates has been used in waste water treatment plants already decades ago Chemicals are inexpensive and in wide use Chemicals are effective way to bind both dissolved and particulate phosphorus into insoluble sludge

19 Preliminary experiences It is too early say how the tested methods work in the different situations and in long run. However, both methods have shown promising results (the reduction of soluble P) Also some development of the methods have already been done.

20 More information at site.

21 Water quality measurement techniques - examples & experiences from water quality research projects in Turku University of Applied Sciences

22 Water sampling & online water quality monitoring

23 Water quality monitoring Water sampling and lab analysis Water sample laboratory Traditional method more simple for field staff Reliable No expensive devices needed Also possibility for automatic sampling Only reliable way for direct nutrient measurements Online water quality monitoring Increasing method Quick, instant result Cheaper at wide areas / many monitoring sites? No transport or contamination risk Not dependent of labs Trained users needed Possibility of unmanned observation! Possibility to notice short term changes on water quality!

24 Turku University of Applied Sciences has experiences on online water quality monitoring in: Standing and running surface waters Baltic sea Waste waters (single households) (Ground waters)

25 Parameters monitored online: Blue-green algae (phycocyanin) & temperature Nitrate & turbidity (Total P correlated with turbidity in clay-turbid waters) Temperature, salinity (Cond.), dissolved oxygen, pH, turbidity, chlorophyll α, blue-green algae (phycocyanin) Flow (water level and/or acoustic doppler method)

26 Water quality monitoring techniques, equipment and monitored sites - Examples

27 Continuous monitoring of Blue-green algae - Public information and an early warning system Tähän kuva tai kaavio An optical measuring sensor (Trios) is mounted on swimming beach Amount of blue-green algae and water temperature is measured every hour Results are sent automatically to webpages via GSM twice a day SMS alert for person responsible possible to set

28 Monitoring of public swimming beaches Three steps risk for BGA; low risk (0-3 mg/l), increased risk (3- 10 mg/l) and high risk (>10 mg/l), traffic lights for swimming. Also the swimming temperature information is important for the public. Positive feedback from the public, media and municipalities.

29 River water & wetland monitoring Seasonal and short-time changes - Flow - Nutrient concentrations and load (P, N) - Dissolved solids load - Other parameters Effectiveness of constructed wetlands and other water treatment actions - Nutrient and TSS retention Short measuring interval –> accurate data to detect short-time changes and calculate total loads Continuous monitoring combined with laboratory samples Data transfer via GSM from field directly to webpages

30 Measuring equipment at running waterbodies YSI 6000-series multiparameter sondes S::Can nitrolyser spectrometers Pressure sensors and acoustic dopplers for flow measurements GSM dataloggers Powered normally with 12V battery Sensor cleaning: mechanical wipers, compressed air Maintenance interval 2-12 weeks


32 Online vertical profiling system, Archipelago Sea Continuous vertical monitoring of water column Seasonal and short-time changes Floating and anchored platform Ice-free period (May – November/December)

33 Features Energy from solar panels Data transfer via GSM-logger Programmable vertical sampling –Profiling interval, e.g. 6 times a day –Max and min sampling depth –Sampling step size, e.g. from every meter Parameters (YSI 6000-series multiparameter sonde): –Temperature –Salinity –Dissolved oxygen –pH –Turbidity –Chlorophyll α –Blue-green algae (phycocyanin)

34 Water temperature 2009

35 Lake Kakskerta onsite vertical profiling results (manned measures)

36 For more results: visit

37 Thank You! Thank you

38 FOR MORE INFORMATION: Turku University of Applied Sciences Antti Kaseva Project Coordinator Sepänkatu 1 Finland 20700 TURKU GSM +358 40 355 0909 e-mail:

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