The relationship between the general trend of terrain and the density distribution of traffic lines in China

The relationship between the general trend of terrain and the density distribution of traffic lines in China

China's terrain is high in the West and low in the East, and the distribution of traffic lines is sparse in the West and dense in the East

This paper briefly describes the layout characteristics and morphological characteristics of traffic lines in different terrain areas of Sichuan Province

Sichuan Province is roughly divided into western mountainous plateau and Eastern Sichuan Basin. The western mountainous terrain is steep and rugged, and the distribution of traffic lines is less restricted by the terrain, which is in a network distribution; while the eastern Sichuan Basin is flat, and the distribution of traffic lines is greatly affected by the terrain. Most of them avoid high mountains and extend along valleys and valleys, which is in a zigzag distribution

What is the impact of river geomorphology on settlement distribution
Plateau, mountain area, plain

In the 1 ∶ 250000 geological mapping of the Qinghai Tibet Plateau, the Cenozoic geomorphic evolution survey method is to find out the morphology, distribution, formation age and other characteristics of geomorphic composition, analyze the genetic types of geomorphology, study the relationship between geomorphology and structure, climate and sedimentation, and analyze the geomorphic development stage through the survey of planation surface, river terraces and other landmark geomorphic surfaces reflecting the uplift process, Based on the investigation results of the terraces in Yangqu section of the upper Yellow River, it is inferred that the South Gonghe mountain was cut by the Yellow River at 0.03 ma. Comparing the terraces in different development areas of the upper Yellow River, it is shown that the evolution process of the upper Yellow River was accompanied by the plateau stage uplift and developed to the upstream stage retrogressive erosion, 1 mA to Hualong guide, 0. 15 mA to Longyang Gorge in Gonghe basin, about 0. 03 Ma to go through the latest uplift event, cut Guinan Nanshan and West Qinling, and communicate with Zoige Basin to reach the source area of the Yellow River

The main location factors affecting the urban layout of Lanzhou City
emergency

1: Geographical location, too inland, traffic underdeveloped;
2: Social factors, backward thinking, repeated changes in the direction of development, there is no sustainable development strategy;
3: Economic factors, due to the first two factors, the economic situation is deteriorating;
If we don't emancipate our minds and change the style of government, we can wait until the last day