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Climate factors are already exerting negative pressure on water resources, society and ecosystems. The analysis of trends and identification of vulnerable water supply areas is related to the River Basin Management Plans. For this end, a methodology for assessment of water resources vulnerability, developed in international projects of the National Institute of Meteorology and Hydrology (NIMH), is adapted. The methodology is further developed by drought risk assessment. The main stages are: 1) Assessment of the cl...

Drought indicator systems help decision-makers to understand how and where the drought occurred and to take measures from the Drought Management Plans. The main goal in the Water Framework Directive (WFD) is the achievement -good ecological status-, but the Article 4.6 allows temporary deterioration of the status, occurred as a result of so called -prolonged drought-. Reduction of natural water resources such as rivers, lakes, aquifers, is associated with the reduction in available water resources for water supply...

The updating of the used inflow data to the reservoirs from Annex 1 of the Water Act has been developed for the needs of the Ministry of Environment and Water (MoEW) and for the annual schedules of their water use. Monthly inflow with a certain probability of exceedance (PE - 50%, 75%, 95%) were estimated. The results of the development are uploaded to the MoEW website(https://www.moew.government.bg).In the report are presented and new unpublished results of the annual security assessments - annually inflows with ...