洮儿河是民国洮昌道的重要河流之一,它起着调节区域内气候变化、水气循环、植被消长等重要作用。在历史上,洮儿河流域多属蒙荒,水量充沛,植被繁茂,沃野千里。到了近代,随着关内移民的渐次增加和轨道交通线的建成,洮儿河流域得到了迅速开发,一大批新兴中小市镇和村屯出现在洮昌道辖境内,改变了原始的生态结构。 Langhe River is one of the important rivers in Yongchang Road in the Republic of China. It plays an important role in regulating climate change, water vapor circulation and vegetation growth and decline in the region. Historically, Tao Er basin more than a famine, abundant water, lush vegetation, fertile ground thousands of miles. In the modern era, with the gradual increase of immigrants within the border and the completion of the rail transit line, the Wan’er River Basin has been rapidly developed. A large number of emerging small and medium-sized towns and villages appear in the jurisdiction of the Chang-chan jurisdiction, changing the original ecological structure.