一、自然概况山西省地处黄土高原东缘,省内太行、大岳、吕梁等山脉纵贯,沟壑纵横,70%以上为山地丘陵。流程5公里以上的河川近800余条,分别隶属于黄河、海河水系;由于大部分坡降在8‰以上,加之降雨量较少,故均为间歇性河流。本省属北温带半干旱气候区, First, the natural profile Shanxi Province is located in the eastern edge of the Loess Plateau, the province Taihang, Daye, Luliang and other mountain ranges, ravines aspect, more than 70% of the mountain hills. The flow of more than 5 kilometers of rivers nearly 800, respectively, belonging to the Yellow River, Haihe River system; as most of the slope falls in 8 ‰ above, combined with less rainfall, it is intermittent rivers. The province is a northern temperate semi-arid climate zone,