Freshwater Oxygen Levels in China, 972 River and 354 Lake Sites from 2005 to 2022

972 river and 354 lake sites in China were monitored monthly for dissolved oxygen concentration, percent oxygen saturation, and environmental variables from January 2005 to December 2022. The dataset, authored by Yongqiang Zhou and released on figshare, analyzes the impact of nutrient management on reversing deoxygenation trends. It includes data on biochemical oxygen demand, phytoplankton abundance, and surface water warming.

Use Cases

• Modeling the relationship between nutrient pollution and dissolved oxygen levels based on biochemical oxygen demand data
• Analyzing trends in freshwater hypoxia and anoxia incidence over time based on long-term oxygen concentration records
• Evaluating the effectiveness of land management policies on aquatic ecosystem health based on correlated environmental variables
• Studying the impact of surface water warming on oxygen saturation despite management interventions

Strengths

• Includes 972 river and 354 lake sites, providing a broad spatial coverage across China
• Contains monthly time-series data spanning 18 years from 2005 to 2022
• Correlates oxygen levels with specific environmental variables like biochemical oxygen demand

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data may reflect geographic bias inherent to its focus on China

Provenance

Source

figshare, authored by Yongqiang Zhou

Collection Method

Monthly monitoring of dissolved oxygen and coeval environmental variables at fixed sites

Time Range

January 2005 to December 2022

Freshness

Last updated 2026-05-05 14:57:40; freshness should be verified

Geography

China