RT Journal Article ID 270434db3a9a8e38 T1 Ecological Estimation of the Quality of Waters at Their Transboundary Diagnostic Analysis JF Hydrobiological Journal JO HYD YR 2000 FD 2000-06-01 VO 36 IS 3 OP 4 AB The necessity of development of the unified methodology and methodical normative base for ecological estimation of water quality of river systems on territories of several countries is considered. The main provisions of the "Methods of ecological estimation of surface water quality by corresponding categories" designed in Ukraine are outlined, as well as those of the "Methods of map-making of the Ukrainian surface water ecological state by water quality" elaborated on that base. These documents can be used for development of international methodical approaches considering requirements of the EU Directives, as well as European and international standards for water quality. PB Begell House LK https://www.dl.begellhouse.com/journals/38cb2223012b73f2,68d915d00ba2651c,270434db3a9a8e38.html