Results showed that the annual and dry season precipitation anomaly in the TGRA presented an increasing trend, and the precipitation anomaly showed a slight decrease during the flood season.
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Precipitation Changes in the Three Gorges Reservoir Area and the Relationship with Water Level Change.
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The sentences
The positive slope represents an increasing trend, whereas the negative slope indicates a decreasing trend.
The precipitation anomaly in the dry season before the impoundment does not show a clear trend.