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Environmental Systems Research

Table 4 Export coefficients of NPS nitrogen sources in the UABC (t/km2 · yr)

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

Land use

Nitrogen source

Export coefficient

Agricultural land

Plough

0.23

Garden plot

0.08

Woodland

0.20

Grassland

0.30

Other farmland

0.15

Construction land

Land for roofed buildings

1.09

Road

1.33

Independent industrial and mining area

1.31

Land for transport

1.41

Land for water conservation facilities

1.10

Unused land

 

0.50

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