[1]姜跃锋a,周 亮a*,陈志杰b.典型河谷型城市建设用地的爬坡特征及其生态质量影响[J].山地学报,2022,(4):570-580.[doi:10.16089/j.cnki.1008-2786.000694]
　JIANG Yuefenga,ZHOU Lianga,*,et al.Slope-Climbing Characteristics of Typical Valley-Type Urban Construction Land and Its Ecological Quality Influence[J].Mountain Research,2022,(4):570-580.[doi:10.16089/j.cnki.1008-2786.000694]
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典型河谷型城市建设用地的爬坡特征及其生态质量影响
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2022年第4期
页码:
570-580
栏目:
山区发展
出版日期:
2022-07-25

文章信息/Info

Title:
Slope-Climbing Characteristics of Typical Valley-Type Urban Construction Land and Its Ecological Quality Influence
文章编号:
1008-2786-(2022)4-570-11
作者:
姜跃锋1a; 周 亮1a; 2; 3*; 陈志杰1b
1.兰州交通大学 a.测绘与地理信息学院; b.建筑与城市规划学院,兰州 730070; 2.地理国情监测技术应用国家地方联合工程研究中心,兰州 730070; 3.甘肃省地理国情监测工程实验室,兰州 730070
Author(s):
JIANG Yuefeng1a;  ZHOU Liang1a;  2;  3*;  CHEN Zhijie1b
1. a. Faculty of Geomatics; b. School of Architecture and Urban Planning, Lanzhou Jiaotong University, Lanzhou 730070, China; 2. National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, China; 3. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China
关键词:
山地城市;  坡谱;  遥感生态指数;  城镇化;  兰州
Keywords:
mountain city;  slope spectrum;  remote sensing ecological index;  urbanization;  Lanzhou
分类号:
P942
DOI:
10.16089/j.cnki.1008-2786.000694
文献标志码:
A
摘要:
为缓解城市用地紧张,大量山地城市在建设过程中向周围更高的坡地扩张和延伸(即城市爬坡),引发一系列的生态环境与灾害等问题。量化城市爬坡过程对生态质量的影响,对规避城市与区域生态风险具有重要意义。本研究选取城市用地紧张的典型河谷型城市兰州作为研究区,通过构建中心城区长时间序列的建设用地坡谱,细致刻画了2000—2020年城市建设用地的爬坡速度、规模和空间异质性特征,通过引入遥感生态指数评估了城市爬坡导致的生态质量变化。结果表明:(1)2000—2020年兰州市中心城区上限坡度增加8°,整体爬坡指数为10.94,其中2015—2020年建设用地爬坡现象最为剧烈,爬坡指数高达9.63,上限坡度增加5°。(2)耕地在8°以下区域对建设用地扩张的贡献率达69.36%,更高坡度上生态用地对建设用地扩张的贡献率达58.92%,且随时间变化,高坡生态用地对建设用地的扩张贡献率进一步提高。(3)城市爬坡区域生态质量整体明显下降,其中生态质量下降的区域占比17.79%,而生态质量提升的区域占比仅有9.5%。本研究对量化城市爬坡过程,降低生态风险,推动山地城市可持续发展具有积极意义。
Abstract:
To alleviate the chronic urban land shortage in urbanization, a large number of mountain cities incline to expand toward higher slopes in close proximity(i.e. occupation in slope land by urbanization, known as slope-climbing), which lead to a series of ecological environment and geo-disaster issues. Quantifying the impact of slope-climbing process on ecological quality is of great significance for avoiding urban and regional ecological risks. In this study, Lanzhou, a typical valley city with tight supply of urban land, was selected as the study area. By constructing a long-term sequence of construction land slope spectrum in the central urban area, the climbing speed, scale and spatial heterogeneity of urban construction land from 2000 to 2020 were described in detail. By introducing the remote sensing ecological index, the ecological quality changes caused by slope-climbing were further evaluated. The results show that:(1)From 2000 to 2020, the upper limit slope of the central urban area of Lanzhou increased by 8°, and the overall built-up land climbing index was 10.94. From 2015 to 2020, the climbing of construction land was the most severe, with built-up land climbing index of 9.63, and the upper limit slope increased by 5°.(2)The contribution rate of cultivated land to the expansion of construction land in the area below 8° was 69.36%, and the contribution rate of ecological land on higher slopes to the expansion of construction land was 58.92%. With the change of time, the contribution rate of ecological land to the expansion of construction land was further improved.(3)The overall ecological quality of slope-climbing areas decreased significantly, of which the areas with decreased ecological quality accounted for 17.79%, while the areas with improved ecological quality accounted for only 9.5%. This study has positive significance for quantifying slope-climbing process, reducing ecological risks and promoting sustainable development of mountainous cities.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2022-04-16; 改回日期(Accepted date): 2022-08-02
基金项目(Foundation item): 国家自然科学基金(41961027); 甘肃省重点人才项目(2021RCXM073); 甘肃省自然科学基金重点项目(21JR7RA281)。[National Natural Science Foundation of China(41961027); Foundation of Key Talent Projects of Gansu Province(2021RCXM073); Key Program of Natural Science Foundation of Gansu Province(21JR7RA281)]
作者简介(Biography): 姜跃锋(1998-),男,江苏省南通人,硕士研究生,主要研究方向:城市遥感。[JIANG Yuefeng(1998-), male, born in Nantong, Jiangsu province, M.Sc. candidate, research on urban remote sensing] E-mail: jiangyuefeng161@163.com
*通讯作者(Corresponding author): 周亮(1983-),男,甘肃天水人,博士,教授,主要研究方向:城市与区域可持续发展。[ZHOU Liang(1983-), male, born in Tianshui, Gansu province, Ph.D., professor, research on urban and regional sustainable development] E-mail: zhougeo@126.com
更新日期/Last Update: 2022-08-30