Wang Guangjie, Peng Wenfu
The Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610068, China.
Key Lab of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Chengdu 610068, China.
Heliyon. 2022 Nov 8;8(11):e11389. doi: 10.1016/j.heliyon.2022.e11389. eCollection 2022 Nov.
The land use degree reflects the land use due to natural factors and human activities, and thus, its spatial differentiation analysis and the study of factors influencing it is of great importance. Although the mechanisms by which changes in factors affect land use have been extensively studied, the impact of factor variations on spatial differentiation of land use degree remains poorly understood. Therefore, in this study, we applied geographical detector, a new tool of spatial statistics, and used spatial autocorrelation and GIS spatial analyses to study the interactive effects of factors on land use degree and their changes in Sichuan, western China and identified the most appropriate characteristics and scope of factors. The land use degree showed an increasing trend. The geographical differentiation of land use was significant, with a high land use degree in the Chengdu Plain and its surrounding areas in the east, a low land use degree in the plateau area of western Sichuan and a significant aggregated distribution. Topographic relief, elevation, annual average temperature, geomorphic type, ≥10°C accumulated temperature, and other factors provided a good explanation for the variability in the land use degree. There were interactive effects of factors that influenced the land use degree. The synergistic effects of factors exhibited mutual and non-linear enhancement relationships, and the interaction of the factors enhanced the influence of individual factors. The most appropriate characteristics and scope of the main factors revealed by our study will contribute to a better understanding of the influences of factors on the changes in land use and their driving mechanisms.
土地利用程度反映了自然因素和人类活动对土地的利用情况，因此，对其进行空间分异分析以及对影响因素的研究具有重要意义。尽管已有大量研究探讨了各因素变化对土地利用的影响机制，但对于因素变化对土地利用程度空间分异的影响仍知之甚少。因此，在本研究中，我们应用了空间统计的新工具——地理探测器，并结合空间自相关和GIS空间分析，研究了中国西部四川省各因素对土地利用程度的交互作用及其变化，确定了各因素的最适宜特征和范围。土地利用程度呈上升趋势。土地利用的地理分异显著，东部成都平原及其周边地区土地利用程度高，川西高原地区土地利用程度低，且呈现出明显的集聚分布。地形起伏、海拔、年平均气温、地貌类型、≥10℃积温等因素对土地利用程度的变异性具有较好的解释作用。各因素之间存在影响土地利用程度的交互作用。因素的协同效应呈现出相互且非线性的增强关系，各因素的交互作用增强了单个因素的影响。本研究揭示的主要因素的最适宜特征和范围，将有助于更好地理解各因素对土地利用变化的影响及其驱动机制。
