Natural resources

Clean water is an important resource that the city of Gradiška has. Under Lijevče polje according to experts, there are significant reserves of clean, drinking water. Given the speed at which global supplies of drinking water are being reduced, it is especially important that this resource is taken into account in future development flows. In that sense, stronger and more active protection of the waters in the area of our City is necessary.

The catchment area of the city of Gradiška consists of the catchment area of the Sava River and its tributaries on the area of 657.7 km² (86,31%) and the Vrbas River basin on the area of 104.3 km² (13,69%). The larger river flows in the City are Jablanica (with tributaries Pisarić, Bajnovac, Bukovica, Ljutava, Vrbaška, Trnova, Lubina, Jurkovica, etc.) that take surface waters from Kozara and Prosara in the Sava River, while Osorna with Borna through the canal water in Vrbas and Lake Bardača.

According to the strategic document “Development and Construction of Irrigation Systems in the Municipality of of Gradiška and the Municipality of Laktaši”, the termination of use of underground water reserves of Lijevče polje is predicted as well as solving of the irrigation problem by the construction of special purpose reservoirs for irrigation on the river basins of Jurkovica, Lubina, Vrbaška, Jablanica and Turjanica. By building these special purpose accumulations, the total volume of accumulation of 45.913 million m³ would be provided and water for irrigation of up to 11.000 ha of irrigation area would be provided.

In the area of the city of Gradiška there are various types of rocks having several types of mineral raw materials. Previous research has shown that there are coal, brick clay, technical building stone, then quartz, copper and mercury mineralization, and architectural decorative stone and others in this area. Brick clay is found in the part of alluvial deposits at the site of the Bok Jankovac site, where its organized exploitation is done. Technical building stone – Diabase is found at several sites in the area of Kozara. The largest massif in the Trnovo – Vučijak region is exploited in an organized manner. Organized exploitation of sand and gravel is also done in the bed of the Sava River.