地理科学进展 ›› 2022, Vol. 41 ›› Issue (7): 1251-1260.doi: 10.18306/dlkxjz.2022.07.009
收稿日期:
2021-10-15
修回日期:
2022-01-18
出版日期:
2022-07-28
发布日期:
2022-09-28
通讯作者:
*许刚(1992— ),男,博士,副研究员,主要从事城市化与土地利用变化研究。E-mail: xugang@whu.edu.cn作者简介:
郑沐辰(2000— ),女,硕士生,主要从事城市空间扩张研究。E-mail: zmchen@whu.edu.cn
基金资助:
ZHENG Muchen1(), XU Gang1,*(
), XIAO Rui2, JIAO Limin1
Received:
2021-10-15
Revised:
2022-01-18
Online:
2022-07-28
Published:
2022-09-28
Supported by:
摘要:
夜间灯光强度是城市社会经济活动强弱的直观表征,通常随到城市中心距离增加而逐渐降低。但其空间衰减过程是否可以定量化、模型化,以及空间衰减规律关于城市形态的指示意义仍不明确。论文获取32个中国主要城市2012年和2020年NPP-VIIRS夜间灯光年度合成数据,以城市中心为圆心,计算同心圆圈层内平均夜光强度;受建设用地密度空间衰减函数启发,采用反S函数拟合城市夜间灯光强度空间衰减特征。结果表明:反S函数可以很好地拟合夜间灯光强度空间衰减特征,模型参数D和α的变化分别反映了城市扩张过程和形态变化。2012—2020年间,各城市半径(参数D)增长到1.1~3.6倍;城市规模较小的长春、银川和西宁经历的夜光亮度增长幅度最大,而东部沿海城市增长幅度较小。参数α的变化说明中国主要城市由夜间灯光反映的空间形态趋于紧凑。反S函数为刻画夜间灯光强度空间衰减提供了新工具,为测度城市扩张和形态变化提供了新指标。
郑沐辰, 许刚, 肖锐, 焦利民. 城市夜间灯光强度空间衰减规律及应用[J]. 地理科学进展, 2022, 41(7): 1251-1260.
ZHENG Muchen, XU Gang, XIAO Rui, JIAO Limin. Distance decay of nighttime lights from urban centers and its application[J]. PROGRESS IN GEOGRAPHY, 2022, 41(7): 1251-1260.
表1
各城市反S函数拟合参数
城市 | 2012年 | 2020年 | |||||||
---|---|---|---|---|---|---|---|---|---|
| | D/km | | | | D/km | | ||
上海 | 2.26 | 0.02 | 63.59 | 0.995 | 2.95 | 0.08 | 70.71 | 0.992 | |
青岛 | 1.55 | 0.03 | 43.96 | 0.989 | 2.29 | 0.08 | 63.05 | 0.971 | |
广州 | 0.88 | 0.12 | 31.03 | 0.981 | 1.57 | 0.07 | 54.25 | 0.971 | |
杭州 | 1.69 | 0.09 | 38.03 | 0.985 | 2.51 | 0.13 | 52.27 | 0.992 | |
北京 | 2.51 | 0 | 39.09 | 0.995 | 2.70 | 0.05 | 52.18 | 0.985 | |
南京 | 1.13 | 0.04 | 29.75 | 0.989 | 1.68 | 0.01 | 50.77 | 0.973 | |
天津 | 0.74 | 0.02 | 30.82 | 0.989 | 1.51 | 0.05 | 46.28 | 0.981 | |
成都 | 1.53 | 0.03 | 37.31 | 0.992 | 1.80 | 0.07 | 45.54 | 0.977 | |
武汉 | 1.49 | 0.08 | 26.43 | 0.987 | 2.71 | 0.09 | 41.66 | 0.991 | |
南宁 | 2.13 | 0.04 | 27.78 | 0.989 | 2.71 | 0.05 | 39.16 | 0.994 | |
重庆 | 0.96 | 0.01 | 29.86 | 0.997 | 2.41 | 0.04 | 38.92 | 0.967 | |
郑州 | 1.69 | 0.05 | 23.56 | 0.982 | 2.66 | 0.07 | 38.38 | 0.988 | |
西安 | 0.73 | 0.05 | 21.04 | 0.986 | 1.54 | 0.04 | 38.06 | 0.977 | |
长沙 | 1.56 | 0.04 | 24.83 | 0.989 | 2.38 | 0.03 | 35.25 | 0.953 | |
合肥 | 1.59 | 0.08 | 20.04 | 0.980 | 1.39 | 0.12 | 29.76 | 0.971 | |
福州 | 1.67 | 0.03 | 21.18 | 0.996 | 2.47 | 0.10 | 28.55 | 0.995 | |
昆明 | 1.12 | 0.03 | 25.92 | 0.996 | 1.73 | 0.08 | 27.15 | 0.993 | |
太原 | 1.02 | 0.03 | 14.34 | 0.992 | 2.09 | 0.09 | 27.03 | 0.969 | |
海口 | 1.34 | 0 | 20.80 | 0.986 | 1.79 | 0.20 | 26.75 | 0.982 | |
哈尔滨 | 0.66 | 0.03 | 10.64 | 0.996 | 1.76 | 0.12 | 25.91 | 0.982 | |
沈阳 | 0.68 | 0.04 | 12.55 | 0.995 | 2.70 | 0.16 | 25.63 | 0.978 | |
乌鲁木齐 | 0.66 | 0.04 | 13.19 | 0.996 | 2.61 | 0.06 | 24.58 | 0.992 | |
济南 | 0.68 | 0.03 | 10.49 | 0.998 | 2.15 | 0.10 | 24.07 | 0.986 | |
呼和浩特 | 0.56 | 0.01 | 7.14 | 0.994 | 1.77 | 0.02 | 23.52 | 0.964 | |
长春 | 0.83 | 0.05 | 6.48 | 0.996 | 2.13 | 0.10 | 23.02 | 0.979 | |
石家庄 | 1.07 | 0 | 11.29 | 0.997 | 2.19 | 0.14 | 22.21 | 0.988 | |
兰州 | 1.39 | 0.12 | 16.76 | 0.968 | 1.81 | 0.13 | 19.66 | 0.953 | |
南昌 | 0.77 | 0.09 | 9.75 | 0.990 | 1.39 | 0.16 | 19.36 | 0.935 | |
银川 | 0.75 | 0.09 | 5.07 | 0.995 | 2.08 | 0.04 | 16.11 | 0.983 | |
贵阳 | 0.44 | 0.02 | 8.62 | 0.989 | 1.54 | 0.04 | 14.33 | 0.951 | |
西宁 | 0.72 | 0.02 | 4.21 | 0.996 | 2.01 | 0.09 | 12.97 | 0.962 | |
拉萨 | 0.75 | 0 | 10.00 | 0.968 | 1.94 | 0.05 | 10.97 | 0.971 |
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