Significance of Qinling-Huaihe boundary line 1 Temperature: ① 10/October 1℃ isotherm (approximately passed)
② the dividing line between warm temperate zone (north) and subtropical zone (south)
2. Precipitation: ① Isoprecipitation line with annual precipitation of 800mm (generally passing). (2) The dividing line between humid area (south) and semi-humid area (north) (1)
3. Climate: the dividing line between subtropical monsoon climate (south) and temperate monsoon climate and temperate continental climate (north).
4. Rivers: The rivers south of this line have large flow, small water level change, no ice age and small sediment concentration; Contrary to the north
5. Vegetation: the dividing line between temperate deciduous broad-leaved forest (north) and subtropical evergreen broad-leaved forest (south).
6. Planting: ① The dividing line between dryland agriculture (north) and paddy agriculture (south) (roughly). ② The dividing line between triple cropping and double cropping (south) and triple cropping and single cropping (north).
7. China geographically distinguishes the dividing line between the northern region and the southern region.
8. The dividing line between the Loess Plateau and the North China Plain (north) and the Sichuan Basin and the middle and lower reaches of the Yangtze River Plain (south)
9. Residential flat-topped thick walls (north) and high walls with sloping roofs (south)
The dividing line between the Qinling Mountains and the Huaihe River was put forward in the book Geography of China in the first year of the Republic of China (19 12), in which the Qinling-Huaihe Line has appeared. As the book says, "In the country. Due to the potential of mountains and rivers, administrative districts can be defined as headquarters, northeast, northwest, north, west and five major departments. " For the headquarters. The book says: "The north-south ridge is divided into three zones horizontally. The Yellow River, the Yangtze River and the Pearl River flow through here. North of the Huaihe River in Beiling is the northern belt, which is the Yellow River Basin ... "This textbook has a description that this book is mainly written according to Zhang's geography textbook.
In a paper entitled "An Introduction to Climate in China" written by Zhu Kezhen 1935, Mr. Zhu explicitly talked about the Qinhuai River Line. But he is talking about a foreigner, keresey, who wrote a book "The Geographical Basis of China" at 1934. The book writes: "Among the mountains in China, the largest is the eastern branch of Kunlun Mountain, and the common name of China is Qinling Mountain, which runs from Tibet to the east to the Pacific coast. This mountain range is divided into two geographical regions in China, and there are significant differences in climate, agriculture and human activities. " Of course, it seems that the statement that the Qinling Huaihe River Line was put forward by foreigners is obviously wrong. Mr. Zhu Kezhen went on to say, "Anyone who has been to the Qinling Mountains has never failed to pay attention to the differences between the northern and southern parts of this mountain range. The reason is that the climate is obviously different, which makes the plant species, travel modes and human characteristics in North China and South China very different. "