Yellow River water rebalanced by human regulation

Area of Science:

• Hydrology
• Environmental Science
• Water Resource Management

Background:

• Global river streamflow is impacted by climate change and human activities.
• The Yellow River experienced severe streamflow reduction and drying in the late 20th century, followed by recent recovery and stability.

Purpose of the Study:

• To comprehensively understand Yellow River streamflow changes and their driving forces.
• To promote effective water resource management in the Yellow River basin.

Main Methods:

• Development of a runoff identity attribution approach.
• Analysis of 61 years of Yellow River streamflow observations.

Main Results:

• Human water consumption caused over 90% of streamflow reduction from the 1950s to 1980s.
• Land cover change became the primary factor reducing streamflow from the 1970s onwards.
• Government management schemes since 2000 have stabilized Yellow River streamflow.

Conclusions:

• Future persistent droughts may be an uncontrollable factor in streamflow reduction.
• A resilient management system is needed to address increased frequency of extreme climate events.