湟水是黄河上游最大的支流,又称西宁河、乐都水。湟水名称最早见于汉代,宋代称之为宗河、邈川水,北魏《水经注》称之为湟水。湟水流域主要位于青海省东部,是该省经济最发达的区域。湟水发源于大阪山南麓、青海省海晏县以北的噶尔藏岭,河源高程4200 m。东流经湟源、西宁、乐都、民和等县市, Lushui is the largest tributary of the upper reaches of the Yellow River, also known as Xining River, Lidu water. Langshui name was first seen in the Han Dynasty, the Song Dynasty called Zonghe, Xichuan water, the Northern Wei Dynasty, “water by the note” called the water. The Huangshui River Basin is mainly located in the eastern part of Qinghai Province and is the most economically developed area in the province. Slush originated in the south of Osaka Mountain, north of Haiyan County, Qinghai Province, Gall Tibetan Ridge, Heyuan elevation 4200 m. East flows through the source, Xining, Ledu, Minhe and other counties and cities,