Analysis: Yishui is in the west of Henan Province, which originates from the northern foot of Funiu Mountain in Luanchuan County, flows northeast, joins the Luohe River near Yangcun Village in Yanshi County, and then forms the landscape of Yishui Luanshan Mountain here.
In Luanchuan County, the runoff of Yi River is affected by precipitation, topography, vegetation and production activities, especially by precipitation. From June to August every year, the average annual precipitation in Luanchuan is 42 1 mm, accounting for more than 50% of the annual precipitation, which is the flood season. When the precipitation on that day is greater than or equal to 50 mm, it becomes a rainstorm, and the river surges, causing flash floods. Floods in the upper reaches of the Yi River occur at least twice or several times a year.
The Relationship between yi river and Luanshan Mountain
Yi River is one of the tributaries of Luohe River, a tributary on the south bank of the Yellow River in China. Originated in Wan Tao Town, Luanchuan County, at the southern foot of Xiong 'er Mountain, it flows through Songxian County and Yichuan, meanders in the southern foot of Xiong 'er Mountain and the northern foot of Funiu Mountain, enters Luoyang via yique, flows into Luohe River in Yanshi, Northeast China, and joins with Luoshui to form Luo Yi River, with a total length of 264.88 kilometers.
The Yihe River and the Luohe River hold up a heavy wing of the Heluo culture, and the "Elo civilization" is praised by some western historians as "the two rivers civilization in the East". Longmen Grottoes is a famous world cultural heritage in China, located on both sides of the Yi River.