西白润，今名蟒河，蜿蜒出自济源城西北的茫茫太行。河床内累累白石在阳光照耀下似银练，状如白润，故名。韩愈《题西白涧》诗曰：“太行之下清且浅，一水盘桓纤山转。千峰万壑不可数，异草幽花几曾见？波中白石隐出明，风翻不动浮云轻。翠峦玉女下双鹤，笑倚秋练开新睛。又疑 West Bai Run, now named Manghe, meandering from the vast northwestern Taiyuan Taiyuan. Whitebed in the river bed in the sun shining like silver practice, such as Bai Run, named. Han Yu “West West white stream” poem reads: "under the Taihang under the Qing and shallow, a water plate Huanjian Shanzhuan. Qianfeng Wanqiu uncountable, secular spend a few flowers have seen? Moving clouds light. Cui Luan Yu female double crane, smiling lean autumn open new eyes open