黄河上游兰西城市群人口时空特征多维透视
罗君, 石培基, 张学斌

Spatiotemporal characteristics of population distribution in the upper reaches of the Yellow River:A multi-dimensional approach in the Lanzhou-Xining urban agglomeration
LUO Jun, SHI Peiji, ZHANG Xuebin
表3 人口随高程和坡度的变化情况
Table 3 Change of population with elevation and slope
分级 高程范围/m 高程分级面积占总面积比重/% 坡度范围/° 坡度分级面积占
总面积比重/%
高程分级的人口密度/(人/km2 坡度分级的人口密度/(人/km2 高程分级的人口数量/人 坡度分级的人口数量/人
I ≤ 1800 11.63 ≤ 3 8.95 254.83 130.55 2854351 1126516
II (1800, 2100] 16.65 (3, 6] 13.71 149.98 122.05 2408229 1614233
(2100, 2400] 15.31 (6, 9] 13.01 202.25 114.61 2982783 1438699
IV (2400, 2750] 10.77 (9, 15] 22.50 146.97 117.18 1524079 2542923
V (2750, 3050] 10.10 (15, 21] 16.67 71.52 125.67 695604 2021276
VI (3050, 3300] 11.89 (21, 27] 11.54 36.18 128.04 414297 1425341
(3300, 3550] 9.81 (27, 35] 8.91 35.06 114.75 331317 986391
(3550, 3850] 7.75 (35, 43] 3.65 35.53 109.91 265409 386773
(3850, 4250] 4.63 (43, 50] 0.91 32.24 104.82 143694 92346
>4250 1.46 >50 0.16 16.10 94.39 22637 1416