Surveillance of needs, initiatives and operations of lake restoration


Monitoring for investigation and surveillance of lake restoration cases

Integrated regional on-line monitoring system

Evaluation of the secondary losses caused by a protected piscivorous bird – the great cormorant



Monitoring for investigation and surveillance of lake restoration cases

Monitoring before, during and after restoration and management measures is of crucial importance in safeguarding the reaching of good status of lakes. Preoperative monitoring is needed for proper identification of the causes for problems. Monitoring is also a prerequisite for selection of a right measure to improve the status of a lake and to plan correctly the efforts for the selected measure. During realisation of measures monitoring is needed to ascertain progress and to know the impacts of the measure; that is either to ascertain that a better water status is achieved - or to notice if measures have not reached desired impacts and to analyse the causes of a possible failure.

Most of the successful restoration cases in Finland regard lakes which have been monitored sufficiently. In many cases the monitoring is obligated in environmental permits and/or the lake has been included in a national, regional or local programme of intensive monitoring.

If worsening of the ecological status of water bodies has been identified in regular monitoring in Estonia, reasons for this are carefully studied during the following year and the measures to improve the situation can be undertaken promptly.    

More information:  Finnish Environment Institute and Centre for Limnology, Estonian University of Life Sciences


Integrated regional on-line monitoring system

Regional on-line monitoring system was launched in 2006 including environmental, traffic and visitor counting sub-systems and internet access to the continuous water quality monitoring of Lake Balaton in Hungary.

The objective was to provide region specific information on the environment and identify links with the load resulting from traffic, tourism and natural forces. Further it provides management alternatives where possible with the option of immediate response.

Increased knowledge and information on lakes and surroundings led to a better understanding of environmental and socio-economical interactions and gave stronger support for decision making.

National level monitoring, including those specified by the Water Framework Directive does not provide enough area specific information for daily operation and details of planning of improvement measures. In addition, environmental monitoring is rarely linked with monitoring of load factors.

Recommended to be used in areas where rapid change in environmental conditions can be expected, especially where it is interlinked with social-economic loads and/or benefits

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More information:  Lake Balaton Development Coordination Agency (LBDCA), Hungary


Evaluation of the secondary losses caused by a protected piscivorous bird – the great cormorant

A set of indicators and methods was established for the evaluation of eligible secondary losses for fish stocks caused by hunting cormorants. The balance between the nature protection, here presented by protection of the cormorants by law, and the necessity of compensation of economic losses caused by the bird, is one of the significant issues in sustainable pond management and is of a dramatically increasing importance. Both, the questions of biodiversity and nature protection as well as economic issues have to be considered. The Czech Republic, the Region of South Bohemia in particular, can offer more than 20 years of experience in the field, as it were the early 1990s when the problem emerged on quite an urgent scale.

More information:  University of South Bohemia, Czech Republic 


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