The wavy distribution curve of precipitation formed on the longitudinal-arranged underlying rangegorge landforms.At leeside of range, dry valley formed due to fohn effect.

纵向排列的岭谷地形波，形成明显的降水波状起伏分布曲线，气流越过山岭后下沉气流带来“焚风”效应，形成干热河谷。