[Influence of human activities on groundwater environment based on coefficient variation method]

Area of Science:

• Hydrogeology
• Environmental Science
• Water Resource Management

Background:

• Beijing's groundwater system comprises six subsystems with varying hydrogeological conditions.
• Human activities exert diverse influences on these subsystems, necessitating evaluation.

Purpose of the Study:

• To assess the impact of human activities on Beijing's groundwater subsystems.
• To evaluate groundwater quality in the first and second aquifers using specific indices.

Main Methods:

• Utilized variation coefficient methods to determine index weights (total hardness, TDS, sulfate, ammonium).
• Calculated comprehensive scores based on national standards and superposition analysis.
• Employed contrast analyses with groundwater subsystems and water quality partitions.

Main Results:

• Human activities exert a greater influence on the first aquifer compared to the second aquifer.
• The Yongding River and Chaobai River groundwater subsystems show higher susceptibility to human impact.
• Groundwater quality evaluation revealed differential impacts across subsystems.

Conclusions:

• Human activities are a significant factor altering groundwater quality in Beijing.
• Specific river subsystems are more vulnerable, requiring targeted management strategies.
• Understanding these impacts is crucial for sustainable groundwater resource management.