Table 7: Roadside biomass carbon stocks changes (area: km2; carbon stocks changes:  kg).

Land-use changeRoad-1Road-2Road-3Road-4All roadsThe study area
AreaCarbon stocks changesAreaCarbon stocks changesAreaCarbon stocks changesAreaCarbon stocks changesAreaCarbon stocks changesAreaCarbon stocks changes

Cropland→ forest1.516.940.000.007.5334.6214.2865.6718.6685.8227.20125.10
Cropland→ grass0.13−0.050.000.000.45−0.182.16−0.842.47−0.963.07−1.20
Cropland→ water body0.000.000.000.001.44−1.162.31−1.872.53−2.052.76−2.23
Cropland→ urban land2.79−2.260.000.002.38−1.930.72−0.592.97−2.412.97−2.41
Cropland→ rural residential area0.000.000.000.000.16−0.130.07−0.060.16−0.130.16−0.13
Forest→ cropland0.000.000.000.000.08−0.350.30−1.390.33−1.511.51−6.97
Forest→ grass0.000.000.000.000.63−3.161.96−9.782.01−10.012.58−12.86
Forest→ water body0.000.000.000.001.30−7.063.81−20.624.36−23.595.99−32.42
Forest→ urban land0.46−2.460.000.000.13−0.720.44−2.370.58−3.160.58−3.16
Grass→ cropland0.450.180.730.291.560.612.050.803.041.183.941.54
Grass→ forest2.5212.560.000.0022.32111.3836.97184.4648.31241.0769.72347.93
Grass→ urban land0.25−0.100.000.000.41−0.170.75−0.311.16−0.491.16−0.49
Grass→ rural residential area0.000.000.000.000.01−0.010.000.000.01−0.010.01−0.01

Total8.1014.800.730.2938.42131.7365.81213.0886.60283.75121.67412.69