Table 2 Statistical summary of sampled catchment (N = 608).

From: Varying sensitivity of mountainous streamwater base-flow \({\bf{N}}{{\bf{O}}}_{{\bf{3}}}^{-}\)concentrations to N deposition in the northern suburbs of Tokyo

Variable

Abb.*

Mean

S.D.

Min

Median

Max

Longitude [°]

 

140.384

0.178

140.047

140.350

140.733

Latitude [°]

 

36.599

0.207

36.156

36.654

36.926

Area [ha]

Area

51.69

57.61

0.34

35.45

644.85

Elevation [m]

Elev

350

159

82

315

817

Slope [°]

Slope

24.5

4.0

13.8

24.1

37.6

Aspect southness

Aspect

0.84

0.22

−0.75

0.92

1.00

Precipitation [mm year−1]

Prep

1511

166

1267

1439

2018

Temperature [°C]

Temp

11.5

1.1

8.1

11.7

13.6

Radiation [W m−2]

Rad

12.8

0.15

12.4

12.8

13.4

N deposition [kg-N ha−1 year−1]

Ndep

13.6

2.7

8.0

13.1

22.4

Broad-leaved coverage [%]

BL

20.4

25.9

0.0

7.7

100.0

Evergreen conifer coverage [%]

ND

70.5

29.6

0.0

79.4

100.0

Evergreen broad-leaved coverage [%]

EG

0.21

3.51

0

0

72.36

Deciduous conifer coverage [%]

DC

0.01

0.24

0

0

5.83

Brown Forest Soil [%]

BFsoil

91.52

22.3

0.0

100.0

100.0

Andosol [%]

ADsoil

6.8

19.9

0.0

0.0

100.0

Grey Lowland Soil [%]

GLsoil

0.57

4.25

0

0

52.74

Brown Lowland Soil [%]

BLsoil

0.65

7.09

0

0

100

Grey Soil [%]

Gsoil

0.5

5.9

0.0

0.0

100.0

  1. *Indicates abbreviations in the results of random forest model (Fig. 3). S.D. indicates standard deviation. Forest coverages with indicate afforested forests (i.e., plantation).