The "Physical Examination Results" of the Marine Ecological Environment in Jiaozhou Bay continue to improve. Typical | China | Ecological Environment
Qingdao, August 14th (Xinhua) - The "physical examination results" of the marine ecological environment in Jiaozhou Bay continue to improve
Xinhua News Agency reporter Wang Kai
Jiaozhou Bay is a typical bay near the coast of China. In recent years, Qingdao City, located in Jiaozhou Bay, Shandong Province, has continuously improved the health of the ecosystem in Jiaozhou Bay since 2003 through unremitting green governance measures.
Jiaozhou Bay is an important fishing ground on the Jiaodong Peninsula and a natural bay with beautiful scenery and excellent environment. But since the 1990s, with the acceleration of urbanization and population growth in Qingdao, the local industry, agriculture, and aquaculture have developed rapidly, leading to a continuous increase in sewage and wastewater discharge. On the other hand, the development of tourism, transportation, and offshore engineering construction has also had a huge impact on the ecological environment of the bay, and the environmental problems in Jiaozhou Bay are becoming increasingly prominent.
According to relevant laws and regulations, Qingdao has taken a series of protective measures. Since 2009, Qingdao has focused on the Jiaozhou Bay Basin and implemented two rounds of watershed pollution control actions. In 2013, Qingdao launched the third round of rectification actions in the Jiaozhou Bay Basin, which identified 100 rectification projects in 7 aspects, including the construction of sewage treatment plants, sewage interception pipelines, river dredging and wetland restoration. At the same time, maritime management departments have also increased their efforts in comprehensive marine management and gradually standardized the order of marine development.
The Dagu River is the largest river in the Jiaodong Peninsula, flowing into Jiaozhou Bay from Jiaozhou City. Liujiadian Village in Jiaodong Street, Jiaozhou City is a populous village along the Dagu River. Liujiadian Village continuously improves the ecological environment and gradually reduces its environmental impact on the Dagu River through "water treatment+toilet treatment+dirty treatment".
The reporter saw in Liujiadian Village that an integrated sewage treatment station, a regulating tank, two lotus ponds, and a reservoir constitute the main project of rural domestic sewage treatment. "After sewage treatment, it undergoes deep ecological treatment in the lotus pond and then enters the reservoir as water for village greening, flushing, landscape, and spraying." Zhang Yansong, Deputy Director of the Jiaozhou Branch of the Qingdao Ecological Environment Bureau, said that through this project, the domestic sewage treatment rate in Liujiadian Village has reached 95%.
In the 1980s, the Institute of Oceanology of the Chinese Academy of Sciences set up the National Field Scientific Observation Station of Jiaozhou Bay Marine Ecosystem in Shandong Province, and began to observe and investigate the marine ecology of Jiaozhou Bay for more than 40 years. This is also the only national comprehensive ecosystem research station in China's temperate waters that integrates monitoring, research, and demonstration.
According to a systematic investigation and evaluation by researchers at Jiaozhou Bay Station, since 2008, the water environment quality in Jiaozhou Bay has been continuously improving and the degree of eutrophication has decreased. The average concentrations of dissolved inorganic nitrogen and phosphate in 2021 were 9.86, respectively μ Mol/L and 0.18 μ Mol/L, equivalent to the level in the 1980s and 1990s.
Sun Xiaoxia, a researcher of the Institute of Oceanology of the Chinese Academy of Sciences and the head of Jiaozhou Bay Station, said that since the 21st century, the plankton in Jiaozhou Bay has shown an obvious upward trend, 3.54 times as much as that in the 1990s; The diversity level of zooplankton has increased by 30% compared to the 1990s.
Li Xinzheng, a researcher at the Institute of Oceanology of the Chinese Academy of Sciences, said that since 2000, with the overall prohibition of trawling in any form and the implementation of the fishing moratorium policy in Jiaozhou Bay, the average biomass and density of macrobenthos inside and outside the bay have been increasing slowly.
According to the monitoring of the Qingdao Municipal Bureau of Ecology and Environment, the proportion of high-quality areas in the nearshore waters of Qingdao has reached 99%, and the marine environment is continuously improving.
"The successful governance of the ecological environment in Jiaozhou Bay has become a sample of China's marine ecological green governance, as well as a typical achievement of sustainable development and utilization in China's coastal areas, providing 'Chinese experience' and 'Chinese demonstration' for global sustainable development." Sun Xiaoxia said.
