Statistical descriptions of delivered quantity of water by sources in the federation of Bosnia & Herzegovina

— Bosnia and Herzegovina is a country rich in unpolluted water resources which could in the future become the driving force of its economic development. In accordance with EU legislation, adopted in 2006, the Federal Law on Water, which among other things regulates the amount of water delivered in order for their sustainable use. The purpose of this study is to determine the trend and statistical descriptions of the amount of water delivered to the sources in the Federation of Bosnia & Herzegovina (FB&H), for the period 2001-2015. The minimum value of the total amount of water delivered in FB&H for the period 2001-2015 (in thousands m 3 ) was 216620 × 10 3 (m 3 ) of water in 2014 and the maximum 237 480 × 10 3 (m 3 ) of water in 2005.


Introduction
OSNIA and Herzegovina is a country in Southeastern Europe, located in the west part of the Balkan Peninsula. Border states of Bosnia and Herzegovina are the Republic of Serbia at north-east, Republic of Croatia at the north, west and south and Republic of Montenegro at south-east.
It is administratively divided in to entities and one district: Federation of Bosnia & Herzegovina (FB&H) and Republic of Srpska (RS) and Brčko District. According to the census from 2013, the total number of people living in FB&H is 3531159.
Total surface of FB&H is 51209,2 km², of which the land surface is 51197 km 2 and the surface of coastal sea is 12,2 km 2 . Territory of FB&H covers two river basins: basin of the river Sava that includes 75,7% and the basin of Adriatic sea that includes 24,3% of the total surface of the country. Bosnia and Herzegovina is rich in salt and fresh water resources. There are listed 262 rivers on its territory. Surface waters of FB&H are, according to the global standards, the waters of high quality. Bosnia and Herzegovina is rich in underground waters. Thermal and mineral waters are one of its most important natural resources. Coast of B&H is south from the delta of Neretva river, its total length is 22 km. Bosnia and Herzegovina has the access to the sea which ahs the surface of 8 km².
Waters of Bosnia and Herzegovina are unpoluted and in the future they could becoe the initiator of its economic development. Insufficient spatial and temporal distribution of water flow requires the construction of the plant for managing the waters of significat size and complexity, in order to provide rational exploitation of waters, protection of quality and quantity of waters and protection against harmful effects of the water.
Federal law on waters that is under jurisdiction of the Federal Ministry of Agriculture, Waterpower Engineering and Forestry and Federal Ministry of Environment and Tourism has appropriately related competences by this Law, regulates the manner of water management within the territory of Federation of Bosnia & Herzegovina (water protection, water usage, protection against harmful effect of waters and regulation of waterflow and other waters), water resources, public water resources, water objects, legal entities and other institutions competent for particular issues of water management and other issues related to the waters of FB&H. The purpose of this law is to reduce the water polution, achieve good state of waters and prevent waters degradation; achievement of sustainable water usage; ensuring a just access to waters; achievement of social and economic development; ecosystem protection; reduction of risk against floods and other negative water impacts; ensuring the participation of the public in making decisions that refer to waters; prevention and solving of the conflicts related to the protection and water usage; meeting the Water quality index (WQI) as management tool is given by N. C. Ferreira, C. Bonetti and W. Q. Seiffert 7 and as classification tool is given by H. Boyacioglu 8 and by P. R. Kannel, S. Lee, Y.-S. Lee, S. R. Kanel and S. P. Khan 9.
WQI for coastal water is given by A. K. Gupta, S. K. Gupta and R. S. Patil 10 and for evaluating surface water quality by F. W. Kaurish and T. Younos 11.
Prediction of WQI by regression analysis (RA) and artificial neural networks (ANN) is given by E. R. Rene and M. B. Saidutta 12. For the trend analysis, we used the following parameters: annual growth rate (AGR) and cumulative growth index (CGI), described in the papers P. Dašić 17 and R. Tošović, P. Dašić and I. Ristović 18.

Data sources and methods
For the calculation of statistical descriptions parameter we used software system MS-Excel.
For the graphical presentation of data we used standard statistical analysis methods and software system MS-Excel which is described in the book G. Briand 19, G. Harvey 20, J. Schmuller 21 and W. Winston 22.

Results and Discussion
Values of the supplied amounts of waters according to the springs in FB&H (in thousands m 3    1) TVWPWSS (total volume of water from the public water supply system) (Fig. 1); 2) VWTWSS (volume of water taken from other water supply systems) (Fig. 2); 3) Total (Fig. 3).
Value of supplied amounts of water from TVWPWSS (total volume of water from the public water supply system) in The highest annual growth of supplied amounts of water from TVWPWSS in FB&H was in 2004 by 761410 3 (m 3 ) water or by 3,44%, and then in 2015 for 681310 3 (m 3 ) water or by 3,25% etc. (Fig. 1).
The highest annual reduction of total supplied water amount in FB&H was in 2014 by 975210 3 (m 3 ) water or by 4,31%, and then in 2006 by 934910 3 (m 3 ) water or by 3,94% etc. (Fig. 3). Statistical descriptions parameter of delivered quantity of water by sources in the FB&H is given in table 3.

Conclusion
Continuous trend of supplied water amounts in FB&H for the period 2001-2015 had the water from TVWPWSS (total volume of water from the public water supplysystem) (Fig. 1) with cumulative growth index (CGI) by 98,73% in relation to 2001. and mean value of 22017410 3 (m 3 ) water and total supplied water amount (Fig. 3) with the cumulative growth index (CGI) by 100,29% in relation to 2001 and mean value of 22699810 3 (m 3 ) water.
Trend of a great growth wavering of the value of delivered amounts of water in FB&H for the period 2001-2015 had the waters from VWTWSS (volume of water taken from other water supply systems) (Fig. 2) with cumulative growth index (CGI) by 183,75% in relation to 2001.
Based on the structure and share in percents of the sources of supplied water amounts in FB&H for 2015 (in thousands m 3 ) (Fig. 4)