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Report on Monitoring Programmes in the Danube River Basin District according to Water Framework Directive Art. 8 of 2006. Documents are divided into groundwater and surface water, including all relevant annexes.

Groundwater constitutes the largest reservoir of freshwater in the world, accounting for over 97% of all freshwaters available on earth (excluding glaciers and ice caps). The remaining 3% is composed mainly of surface water (lakes, rivers, wetlands) and soil moisture. By incorporation into the Water Framework Directive (WFD), groundwater became part of an integrated water management system.

The waters of Bosnia and Herzegovina are split between the Danube River Basin District and the Adriatic Sea Basin. Some 40.2% of the Sava river sub-basin, the second largest sub-basin of the Danube River Basin, lies in Bosnia and Herzegovina. The rest of the watershed is shared by Croatia, Serbia and Slovenia.

The Sava is the Danube's largest tributary of the Danube in terms of discharge and the second largest in terms of catchment area. The Sava is shared by Slovenia, Croatia, Bosnia and Herzegovina, Serbia and Montenegro. The joint management arrangements acted as a pilot for the implementation of the European Union's Water Framework Directive for the Danube and Europe.