Table 2. The distribution of renewable flows (R) and NPP through different land-use type.

Land-use type	Area (ha)	R-average (E+15 sej/ha/yr)	R (E+20 sej/yr)	R land-use type/R total (%)	NPP-average (E+06 g C/ha/yr)	NPP (E+11 g C/yr)	NPP land-use type/NPP total (%)	R/NPP (E+08 sej/g C/yr)
Urban	1.42E+05	1.91	2.72	0.80	2.36	3.35	0.57	8.11
Forest	5.66E+06	4.34	246.45	72.92	8.03	454.62	76.18	5.42
Grass	9.86E+05	4.68	46.23	13.67	7.45	73.44	12.32	6.20
Farm	9.02E+05	2.12	19.20	5.68	6.46	58.29	9.76	3.29
Water	1.07E+05	4.00	4.30	1.27	2.79	2.99	0.51	14.38
Bare land	5.59E+04	33.95	18.98	5.61	4.85	2.71	0.46	70.03
Total (Hokkaido Region)	7.85E+06	4.29	337.97		7.59	595.40		5.67