**The Synchronous Development Pattern and Type Division of Functional Coupling Coordination and Human Activity Intensity Based on the "Production–Living–Ecological" Space Perspective: A Case Study of Wanzhou District**

**Tian Liang 1,2, Fei Yang 1,2, Yinchen Luo 2,3, Mengying Fang <sup>1</sup> , Xi Huang <sup>1</sup> , Zhiyong Zhang 2,4,5, Chuanhao Wen 6,\* and Xiaohong Ren 7,\***


**Abstract:** The coupling and coordinated change characteristics of land-use production, living, and ecological functions (PLEFs) and their relationship with human activity intensity (*HAI*) in ecologically fragile areas are important to study, especially in promoting the sustainable development of regional land-use and revealing the evolution of the human–land relationship. In this paper, the coupling coordination degree (CCD) model was used to analyze the coordinated development level of PLEF in Wanzhou District from 2000 to 2020. The *HAI* was measured by the equivalent of construction land. The synchronous development model was introduced to analyze the relationship between them. The results showed that, in Wanzhou District, the PLEFs showed significant spatial distribution differences and evident spatial complementarity. The PLEFs of Wanzhou District were at a good coordination level, but exhibited a downward trend. A spatial pattern of "high in the west and low in the southeast" was presented. The CCD of the production–living function was poor, which is the critical direction of future optimization. The value of *HAI* in Wanzhou District showed an increasing trend and exhibited a high concentration in the central town and its surrounding regions. According to the synchronous development state of the *HAI* and the CCD of the PLEFs, Wanzhou District was divided into three development types. The development type of most areas of Wanzhou District was positive, but the area decreased over the past 20 years. Therefore, it is crucial to propose other regulatory strategies for regions with different development types. This research will provide a decision-making reference for promoting the coordination of the PLEFs and alleviating human–land relations in the reservoir area of central and western China, mountainous regions, and similar areas in developing countries.

**Keywords:** coupling coordination degree model; "production–living–ecological" functions; human activity intensity; the synchronous development model
