The Status of the Mantovo Reservoir and Management Perspectives

Momir Paunović1, Valentina Slavevska-Stamenković2, Stoe Smiljkov2, Dana Prelić2, Milica Ristovska2, Vasil Kostov3, Irina Shoreva2 and Biljana Rimcheska2

 

1 University of Belgrade, Institute for Biological Research "Siniša Stanković", Despota Stefana Boulevard 142, 11000 Belgrade, Serbia; E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

2 Institute of Biology, Faculty of Natural Sciences and Mathematics, Gazi Baba bb, 1000 Skopje, Macedonia

3 Institute of Animal Science - Fisheries Department, Ile Ilievski 92-a, 1000 Skopje, R. of Macedonia

 

 

Abstract

The objective of this study is to contribute to the optimization of monitoring activities of the Mantovo Reservoir (South-Eastern part of the Republic of Macedonia), to propose effective measures to reduce the pressures and improve the status of the reservoir. Development of an effective system of water bodies status assessment in accordance with the recommendations of the EU Water Framework Directive - 2000/60/EC, which includes more frequent monitoring of physico-chemical parameters, optimization of monitoring of chemical determinants, more intensified involvement of biological monitoring and identification of basin specific pollutants were pointed out as priority activities. Regarding the optimization of the monitoring activities, our study showed that monthly monitoring of water quality determinants could be reduced to the following physico-chemical parameters: temperature, pH, transparency, DO and oxygen saturation, nutrients (NH4+, NO2-, NO3-, TP), calcium, magnesium and metals (iron, manganese and copper), BOD and COD (KMnO4). Manganese, iron and copper were found to be important pollutants for the Mantovo Reservoir. Our opinion is that biological monitoring should be more frequent, but it could be limited to the survey of two dominant species Limnodrilus hoffmeisteri and Chaoborus crystallinus. A set of measures for the status improvement of the reservoir is proposed in this paper that includes: hydro-technical works at the mouth of the Kriva Lukavica River aimed at reducing the inflow of pollutants, reservoir bank stabilization, reduction of pollution caused by urban waste waters, regulation of construction activities in the area of the reservoir and proper management of sports activities.

Keywords: water management; impact assessment; water body status monitoring, biological monitoring, the Mantovo Reservor.

 

 

Introduction

 

Reservoirs are managed water bodies and, therefore, there is a particular need for the managers to understand their physical, chemical and biological features. This knowledge is acquired through research and assessment of water quality/status data gathered during routine monitoring programs. So, water quality in a reservoir can be maintained in the desired quality limits, only with effective monitoring of selected water quality parameters (World Lake Vision Committee, 2003), which is the base for the design of short- and long-term management plans.

More than 121 reservoirs have been built in the Republic of Macedonia (21 larger and more than 100 small reservoirs). They are used for water supply, hydro energy production, irrigation, fishing and tourism (Slavevska-Stamenković et al., 2009). 

In respect to water supply, the Republic of Macedonia mostly relies on surface water resources. However, not enough attention has been given to complex physical-chemical and biological investigation (Stojkovski, 1960; Smiljkov, 1996; Miljanoviċ et al., 2004; Slavevska-Stamenkovic et al., 2009; Slavevska-Stamenković et al., 2012) and adequate routine monitoring, ecological protection and management are lacking.

Better understanding of the main physical and chemical processes and the ecological response may be essential for proper reservoir management. Slavevska-Stamenković et al. (2012) analyzed spatial and temporal heterogeneity of the limnological characteristics and provided more detailed information about the limnological processes taking place in the Mantovo Reservoir (South-Eastern part of the Republic of Macedonia). The obtained data could be used to indicate possible measures to reduce the pressures and consequently, to improve the status of the reservoir, so it shall be the focus of this study.