Extended data:
Longquanyi District belongs to Chengdu, Sichuan Province, and is one of the municipal districts of Chengdu 1 1. Located in the east of Chengdu, it borders Jinjiang District in the west, Shuangliu District in the southwest, Xindu District in the north, chenghua district in the northwest and qingbaijiang district, Jintang County and jianyang city in the east. It is the central city of Chengdu.
2065438+In July 2009, it was selected as the pilot county (district) of the National Intellectual Property Strong County Project. On September 20, 20 19, it won the honorary title of National Greening Model Unit.
First, the terrain
Longquanyi District is located at the eastern edge of Chengdu Plain. The highest elevation is 105 1.3m (Zhoujialiangzi, Changsongshan), and the lowest elevation is 456.8m (Baiyanggou, Sanyuan Village, Chadian Town), with a relative elevation difference of 594.5m The total area is 556.98 square kilometers. The middle part of Longquan Mountain is located in the southeast of the area, which runs from east to west and north to south. It is the boundary mountain between Chengdu Plain and the hills in the middle of Sichuan.
There are low mountains, hills and flat dams in the territory, and the terrain gradually inclines from southeast to northwest, and the inclination angle is less than 10 degrees; The flat dam is the main factor, followed by low mountains, and the hilly area is small. The southeast is a low mountain and deep hilly area, and the middle and northwest are shallow hilly areas between flat dams.
From west to east, Sleeping Bed Street and Longquan Street, which span 5 km from Chengdu-Chongqing Highway to 18 km, are wavy, higher than the north and south sides, and become the watershed for natural drainage to Tuojiang River and Minjiang River in this area.
Second, the landform.
Longquanyi District has flat dams, hills, mountains and peaks.
Third, the climate characteristics
Longquanyi District belongs to the subtropical humid climate zone of Sichuan Basin, with mild climate, humid air, no severe cold in winter, no intense heat in summer, warm spring and cool autumn, distinct four seasons, long frost-free period and low wind.
The temperature rises rapidly and is unstable in spring, and it is easy to get cold in spring, with little precipitation and occasional hail and gust. There is much precipitation in summer and autumn, which is easy to cause floods; It is rainy and cold in autumn; It is foggy in winter, with little snow and little sunshine. ?
Fourthly, water system hydrology
The water system in Longquanyi District belongs to the tributaries of the Yangtze River and Tuojiang River. There are Luxi River, Dougou River and Shahe branch ditch in the southeast of the territory, which are tributaries of Jinjiang, a tributary of Minjiang River. Its drainage area is 124 square kilometers, accounting for 22.3% of the total area. Xijiang River, Yuanjiagou River, Tiaoting River, Huang Shuihe River and Chang 'an River in the northwest are tributaries of Pi River and Jiangxi River in Tuojiang River system.
Its drainage area is 433 square kilometers, accounting for 77.7% of the total area. Changsongling Line is the watershed between Minjiang River and Tuojiang River. Luxi River, Xijiang and Tiaoting River basins cover an area of over 50 square kilometers.
Verb (abbreviation for verb) soil type
There are seven kinds of soil-forming parent materials in Longquanyi District, including Jurassic, Cretaceous and Quaternary. There are 6 subtypes of paddy soil, yellow soil, purple new alluvial soil and purple soil, 14 soil genera and 40 soil species.
The tail of the east and west wings of Longquan Mountain is red-purple soil, and the northern section is brown-purple soil; The southwest dam area is old alluvial yellow soil, and the bank of the dam area belongs to purple new alluvial soil and gray-purple lake sand mud; The dam and mound areas in the midwest are made of ginger, stone and yellow mud. ?
References:
Baidu encyclopedia-Longquanyi district