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一、流域自然地理松花江流域位于东经119°52′至132°31′北纬42°41′至51°38′之间。流域的西与西北面以大兴安岭山脉与额尔古拉河流域为界、东北面以小兴安岭山脉与黑龙江右侧支流逊河,库尔滨河等流域为界,东以长白山脉、完达山脉与乌苏里江、绥芬河、图门江等流域为界,东南以长白山脉与鸭绿江流域为界,南面以哈达岭与东辽河流域为界,西南为松辽平原,与西辽河流域的分界不甚明显。
I. Natural Geography of the Basin The Songhua River basin is located between 42 ° 41 ’and 51 ° 38’ north longitude 119 ° 52 ’to 132 ° 31’ east longitude. In the west and northwest of the basin, the Daxinganling Range and the Ergou River Basin are bounded by the boundary, the Xiaoxing’anling Range in the northeast and the Xunhe River and the Qu’erbin River watershed in the right bank of Heilongjiang Province. The Changbai Mountain Range, Wusuli River, Suifenhe, Tumen River and other watershed as a boundary, southeast of the Changbai Mountains and the Yalu River Basin bounded in the south by the Hadar Ridge and the East Liaohe River Basin as the boundary, southwest Songliao Plain, and the West Liaohe River Basin boundaries is not obvious .