Table 1 Overview of OC and BD data statistics for sediments and soils from Namibia, Pakistan and the United Kingdom

Sediment organic carbon

 Sample depth (cm)

0–30 [26]

0–10 [49, 54], 0–2 [11, 12]

0–3 [18, 51], 0–1 [13, 19, 34]

 OC_average (%)

3.72

1.72

0.78

 Number of samples

968

109

102

 Min. value

0.1

0.34

0.03

 Max. value

22.3

4

6

Soil Organic Carbon

 Sample depth (cm)

0–10 [15]

0–10 [15]

0–10 [15]

 OC_average (%)

0.34

0.86

6.98

Sediment Bulk Density

 Sample depth (cm)

0–10 (inferred) [16]

0–2 [11, 14]

0–15 [8]

 Bulk density_average (kg/dm³)

1.17

0.82

1.13

 Number of samples

16

24

137

 Max. value

n.a.

1.06

1.5

Soil Bulk Density

 Sample depth (cm)

0–30 [32]

0–50 [25]

0–15 [60]

 Bulk density_average (kg/dm³)

1.56

1.5

0.73

 Number of samples

17

Raster data

1385

 Min. value

1.25

1.3

0.15

 Max. value

1.76

2.6

1.30