| Autor: |
Ai-Lin, Yang, Fang, Yang, Shao-Bin, Li, Qi-Biao, Yu, Neng-Wang, Chen |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Huan jing ke xue= Huanjing kexue. 43(11) |
| ISSN: |
0250-3301 |
| Popis: |
Dissolved oxygen is a key parameter to measure water environment quality and ecosystem health. Currently, the problem of hypoxia (low oxygen) is prominent in coastal areas in China, but there is a lack of research on the spatiotemporal characteristics of dissolved oxygen and the control mechanism of hypoxia in the watershed-coastal system. Based on the data of 135 surface water (including estuaries) and 66 coastal water monitoring sites in Fujian Province from 2011 to 2020, this study analyzed the spatiotemporal variation pattern of dissolved oxygen at seasonal and interannual time scales. The data of hypoxia (10% quantile, corresponding to 67% saturation) were selected to study the characteristics and control mechanism of hypoxia in four types of water bodies (i.e., rivers, reservoirs, estuaries, and coastal waters) using mathematical statistics and a random forest model. The results showed that the dissolved oxygen saturation was the highest in the coast[(98.2±10.2)%] and the lowest in the estuary[(79.2±17.9)%]. Compared with that in the 12 |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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