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Table 2 Available data for the UABC

From: Spatial distribution of non-point source nitrogen in urban area of Beijing City, China

Type

Scale

Source

Land use

1:1 500 000

RS image digitalizing and interpreting, Beijing municipal people's government, China

Landform

1:250 000

National geomatics center of China

Administrative division

1:1 500 000

Beijing municipal bureau of statistics

Social economics

Each district

Beijing municipal bureau of statistics

Export coefficient

Each nitrogen source

Literature, statistical data, and field monitoring