headwaters,upper course,upper reach /SCIENCE/
[DE] Oberlauf
[EN] headwaters; upper course; upper reach
[FR] cours amont; cours supérieur
head waters of a river,headwater,headwaters,upper waters of a river /SCIENCE/
[DE] Oberlauf eines Flusses; Quellfluesse; Quellgebiet-Oberlauf
[EN] head waters of a river; headwater; headwaters; upper waters of a river
[FR] amont d' un cours d' eau; cours supérieur d' une rivière