Using negative exponential function to characterize built-up land density along slope gradient for 19 urban areas in China

作     者：SONG Yufei PENG Qiuzhi LU Jiating LYU Leting PENG Fengcan SONG Yufei;PENG Qiuzhi;LU Jiating;LYU Leting;PENG Fengcan

作者机构：Faculty of Land Resources EngineeringKunming University of Science and TechnologyKunming 650093China Surveying and Mapping Geo-informatics Technology Research Center on Plateau Mountains of Yunnan Higher EducationKunming 650093China Yunnan Natural Resources and Planning Intelligence Innovation LaboratoryKunming 650093China School of Geographical SciencesLiaoning Normal UniversityDalian 116029China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2024年第21卷第11期

页      面：3859-3870页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 08[工学] 081303[工学-城市规划与设计(含：风景园林规划与设计）] 09[农学] 0903[农学-农业资源与环境] 083306[工学-城乡规划管理] 0813[工学-建筑学] 0833[工学-城乡规划学] 083302[工学-城乡规划与设计] 

基　　金：supported by the project of the National Natural Science Foundation of China entitled“Distribution and change characteristics of construction land on slope gradient in mountainous cities of southern China”(No.41961039) 

主　　题：Negative exponential function Urban built up land density Slope gradient Sloping urban area Sloping land urbanization Mountain area 

摘      要：In China,numerous cities are expanding into sloping land,yet the quantitative distribution patterns of urban built-up land density along the slope gradient remain unclear,limiting the understanding of sloping land *** this paper,a simple negative exponential function was presented to verify its applicability in 19 typical sloping urban areas in *** function fits well for all case urban areas(R^(2)≥0.951,p0.001).The parameters of this function clearly describe two fundamental attributes:initial value a and decline rate *** 2000 and 2020,a tends to increase,while b tends to decrease in all urban areas,confirming the hypothesis of mutual promotion between flatland densification and sloping land *** regression analysis indicates that the built-up land density and the ruggedness of background land can explain 70.7%of a,while the average slope ratio of built-up land to background land,the built-up land density and the built-up land area can explain 82.1%of *** work provides a quantitative investigative tool for distribution of urban built-up land density along slope gradient,aiding in the study of the globally increasing phenomenon of sloping land urbanization from a new perspective.