In order to alleviate road congestion and improve the air quality in Xi, Xi has also implemented a vehicle restriction system. In the restricted time and area, drivers should be prohibited from driving in time, otherwise this behavior will be punished. 20 19 Xi 'an traffic restriction regulations clearly stipulate the time limit, specifically from March 2065438 18 to March 2020 13, and from 7: 00 to 20: 00 on weekdays.
Foreign cars and temporary license plates are also restricted by Xi, and the last digit of the license plate is subject to letters. Foreign cars pass through Xi' an Expressway, and the restriction of Xi' an is implemented at the next expressway. Therefore, it is recommended that the majority of drivers make a record of the limit in advance during driving to prevent inconvenience to travel.
Natural resources:
Xi is a water-deficient city in the west. The groundwater reserves in Xi city are about 1.9438+0 billion cubic meters. In February of 20001year, the main project of Heihe water control project was completed, supplying 400 million cubic meters of water to Xi every year, forming a daily water supply capacity of 6.5438+0.2 million tons. Coupled with groundwater resources, the daily water supply capacity of the urban area can reach 6.5438+0.72 million tons, which basically meets the urban production and domestic water demand.
The natural vegetation in Xi 'an was not directly damaged by the Quaternary continental glaciers, but some tertiary ancient relict plant, such as Ginkgo biloba, Pistacia vera, Lianxiang and Majiazi, were still preserved. There are natural vegetation types such as alpine shrub meadow, coniferous forest, mixed coniferous and broad-leaved forest and deciduous broad-leaved forest in Qinling Mountains from high altitude to low altitude. There are abundant wild plant resources in natural vegetation. Up to 20 16, there are 65438 families, 68 1 genus and 2224 species of wild plants, which is one of the important seed plant gene banks in China.