Abstract
Dissolved organic matter (DOM) has a great impact on the main pollution indicators of lakes (such as chemical oxygen demand, COD). Therefore, DOM is the research basis for understanding the meaning of the water environment and the laws of the migration and transformation of pollutants. Qinghai Lake is one of the world’s typical inland plateau lake wetlands. It plays important roles in improving and regulating the climate and in promoting a virtuous regional ecological cycle. In recent years, with the acceleration of urbanization and the rapid development of tourism, under the background of climate change, and with grassland degradation and precipitation change, the whole basin of Qinghai Lake has been facing great ecological pressure. In order to comprehensively explore the water environment of Qinghai Lake and to protect the sustainable development of the basin, a systematic study was carried out on the whole basin of Qinghai Lake. The results show the following: (1) from 2010 to 2020, the annual average value of CODCr in Qinghai Lake fluctuated in the range from class III to class V according to the surface water environmental quality standard, showing first a downward trend and then an upward trend. (2) The concentration of CDOM in Qinghai Lake had obvious temporal and spatial changes. (3) The spatial distribution of the total fluorescence intensity of FDOM in water was also different in different seasons. However, in the three surveys, the area with the highest total fluorescence intensity of FDOM in the water body appeared near Erlangjian in the south of Qinghai Province, indicating that anthropogenic sources are the main controlling factors of dissolved organic matter in the lake.
Highlights
Dissolved organic matter (DOM) is ubiquitous in soil, rivers, lakes, and oceans in nature
DOM is a complex organic mixture composed of different functional groups and molecular structures [2], which usually include humus, carbohydrates, and proteins, and it plays an important role in the global carbon cycle [3]
DOM may be derived from the decomposition of plant substances and extracellular substances released by aquatic organisms and microorganisms or from the transportation of degraded organic substances from the surrounding terrestrial environment by rivers and groundwater [4,5]
Summary
Dissolved organic matter (DOM) is ubiquitous in soil, rivers, lakes, and oceans in nature. It location have a significant impact on the global climate [11,12]. Qinghai Lake is an plays a great role in improving and regulating climate and promoting a virtuous cycle of important water body for the maintenance of the ecological security of the Tibet Plateau. There are few investigations or regional environmental It plays a great role in improving and regulating climate and promoting a virtuous cycle studies on the water environment of the Qinghai Lake Basin. Lake,distribution the carbon cycle process characteristics of dissolved organic matter in the water body are helpful in gaining a deep within the basin, and its potential impact on water quality, and it can provide support in understanding of the current situation of theofwater environment of Qinghai. Provide support in the form of background data for the analysis of lake water environments and assessments of water bodies
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
