RUDN Journal of LawRUDN Journal of Law2313-23372408-9001Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)5857Tendencies of progressive development and codification of norms of International Law concerning the use of transboundary watercources (ecological aspects)SasievK KhКафедра международного права; Российский университет дружбы народов; Peoples' Friendship University of Russia-Peoples' Friendship University of Russia1501200819510107092016Copyright © 2016, Legal Science2016The theme and problematic of the article face especially sharply the states which appeared on a political map of the world as a result of collapse of the USSR, but at the same time do not lose an urgency with reference to many regions of the world that face problems of settlement of the relations connected with transboundary watercourses, in particular their ecological component and necessity of systematization and development of norms of international law concerning use of such transboundary watercourses. The basic approaches to the decision of the common tendencies are considered in the given article.