Peer-reviewed articles 17,970 +


Nevena Shuleva; Neno Aleksandrov; Konstantin Kolev; Maya Tsoklinova
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
In Bulgaria, the number of water sources and facilities for drinking and domestic water supply from surface and underground water is about 7,480. They are surrounded by sanitary protection zones (SPZ). Each SPZ has 3 belts, which are organised according to an accepted methodology. With the help of a designed geographic information system, it was found that in Bulgaria forest territories that belong to SPZ around water sources and water supply facilities for drinking and domestic needs have a total area of 576,117 ha and 49.837 million cubic meters of total growing stock. The importance of sanitary protection zones for water protection, health and life quality of the population is indisputable. Due to this the goal of the present paper is to systemize forests around water sources with protection functions in Bulgaria in homogenous groups. The systematization is done on the basis of K-means cluster analysis, which is applied for coniferous, coppice and high-stem forests for each of the three SPZ in 28 regions from level NUTS-3 in Bulgaria and three variables, which characterize forests, namely – forest area (ha), mean annual increment (m3/ha), total growing stock of forest territories (m3). On this ground it has been established that high-stem, coniferous and coppice forests from the three SPZ can be systemized in 6, 6 and 7 homogenous clusters respectively. The variables, which contribute to a high extent for cluster formation, are as follows: area of high-stem forests from belt 3; area of coniferous forests from belt 2; and area of coppice forests from belt 3.
[1] Kolev, K., Tsoklinova M., Cluster analysis of the competitiveness of state-owned forestry enterprises, collective monograph “Economy of Bulgaria and the European Union: Science and Business”, University of National and World Economy, Publishing House – UNWE, 2017, ISBN 978-619-160-071-7
[2] Kolev, K. Forestry Management, S., 2018, ISBN 978-619-239-066-2, p. 366.
[3] Manov, A. Multidimensional statistical methods using SPSS. University Publishing House ‘Stopanstvo’, S., 2002, ISBN 954-494-514-8, p 247
[4] Organisation for Economic Co-operation and Development. Handbook on Constructing Composite Indicators, Methodology and User Guide, Joint Research Centre in Ispra, France, 2008,ISBN 978-92-64-04345-9, p 158
[5] Yovkov, I., Shuleva N., Water production function in forest management models, S., 2011, ISBN: 978-954-323-827-9, p 195
[6] Forest Act, in force since 9 April, 2011, promulgated in State Gazette issue 19 of 8 March 2011, last supplemented in State Gazette issue 21 of 12 March 2021.
[7] Water Act, in force since 28 January, 2000, promulgated in State Gazette issue 67 of 27 July, 1999, last amended and supplemented in State Gazette issue 17 of 26 February, 2021.
[8] Regulation No. 3 of 16 October, 2000 on the conditions and procedures for the study, design, approval and exploitation of sanitary protection zones around water sources and drinking and domestic water supply systems as well as mineral water sources, used for medicinal, prophylactic, drinking and hygiene purposes issued by the Minister of Environment and Water, Minister of Health, and the Minister of Regional Development and Public Works, promulgated in State Gazette issue 88 of 27 October, 2000.
[9] Geographic portal, Executive Forest Agency,
Thе rеsеarch lеading to thеsе rеsults rеcеivеd funding from thе Bulgarian Sciеncе Fund – projеct: “Assessment of the water ecosystem service provided by forest areas with water protection functions in Bulgaria”, Contract No. КП-06-ОПР 03/7.
Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 06-08 December, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
06-08 December, 2022
sanitary protection zones, K-means cluster analysis, coniferous forests, high-stem forests, coppice forests