Air quality in Tianjin Binhai New Area

By the end of 2022, the air quality in Tianjin Binhai New Area will continue to improve.

By the end of 2022, Binhai New Area has fought a tough battle against pollution. Through the joint efforts of the whole region and Qixin, the air quality has been continuously improved and the water environment quality has been generally stable.

In 2022, the air quality in Binhai New Area continued to improve, and the comprehensive index of ambient air quality was 4.30, up 4.2% year-on-year; The average annual concentration of PM2.5 was 36 μ g/m3, up 5.3% year-on-year; The number of days when air quality reached Grade II and above was 278 days, an increase of 13 days year-on-year, ranking first in the city.

In terms of water environment quality, in 2022, the comprehensive index of water environment in the new district was 1.70, an improvement of 6.67% year-on-year. The water quality of 16 surface water assessment sections all reached the standard, and the cumulative water quality of 12 rivers entering the sea reached more than five categories, with the compliance rate of 100%. The quality of soil environment is good. In 2022, all the agricultural land in the whole region belongs to the priority protection farmland, and there is no pollution farmland. The safe utilization rate of key construction land reached 100%.

Geographical environment of Binhai New Area

Coastal areas used to be the sea. From the eighth year of Li Qing in the Northern Song Dynasty (1048) to the second year of Jianyan in the Southern Song Dynasty (1 128), the Yellow River moved north and entered the sea via Tianjin, which lasted 62 years. Rivers transport about 65.438+0.2 billion tons of sediment to the sea every year, pushing the coastline into the sea for about 25 kilometers. In addition, the tidal erosion of seawater in the past thousand years has gradually formed a landform characterized by typical accumulation plains, covering an area of 2256.49 square kilometers.

Accumulation plains are divided into marine alluvial low plains and marine low plains. The ground elevation (Dagu elevation) is less than 5 meters, and the overall terrain is low and flat, slightly inclined to the sea and thickened from west to east. There are many lagoons, Wadian wetlands, residual old roads and salt marshes in this area, and soil salinization in coastal areas is serious. The three shellfish veins distributed on the west coast of Bohai Sea are regressive relics from east to west, which are one of the three famous shellfish veins in the world and occupy an important position in the research fields of international ocean, Quaternary geology, paleoclimate and paleoenvironment.

The coastal area is located on the east coast of the Eurasian continent in the mid-latitude of the northern hemisphere, which belongs to the continental climate of warm temperate zone, semi-humid and semi-arid monsoon and has the characteristics of maritime climate. The annual average temperature is 14.0℃, the annual precipitation is 782.6mm, the annual sunshine hours are 2610.8h, and the annual average relative humidity is 58%. It was foggy for 20 days in a row.

Reference to the above content: Baidu Encyclopedia-Binhai New Area