Luohe river, located between Xiaolangdi and Huayuankou, is one of the ten major tributaries of the Yellow river, and is also a main source of storm flood of the lower Yellow river.

• 洛河位于黄河小浪底至花园口区间,是黄河十大支流之一,也是黄河下游主要的暴雨洪水来源区。