## 4 Results and Discussions
### Evolution Pattern of Spatial Characteristics of Water Conservation in Yunnan Province  
In order to further explore the changes in spatial agglomeration characteristics of water conservation functions in Yunnan Province and eliminate the errors caused by the size differences of administrative units, 129 county-level administrative regions in Yunnan Province were taken as samples to conduct global and local spatial autocorrelation statistics of water conservation functions in the province from 2000 to 2018, as shown in Table 2. The results show that the Moran's I of water conservation in 2000, 2010 and 2018 are greater than  
Figure 5: Conservation function and influencing factors of different water resources in Yunnan Province. 0.5. In addition, the \(p\) values of the four phases are all 0.00. Through the significance test, it shows that the water conservation function of Yunnan Province has a strong positive spatial agglomeration. This shows that the water conservation is concentrated and connected in clusters, and the average depth of water conservation in the surrounding areas is also higher in the areas with a higher average depth of water conservation. Where the average depth of water conservation is low, the depth of water conservation in the surrounding areas is also low. Its strong positive global spatial autocorrelation also indicates the existence of spatial differences in water conservation functions within Yunnan Province. The global spatial autocorrelation reflects the spatial evolution process of the whole study area, and we further analyze the local spatial agglomeration phenomenon of water conservation in Yunnan Province through local spatial autocorrelation to evaluate its high-value agglomeration area and low-value agglomeration area. As shown in Figure 6, the water conservation function showed similar phenomena in the three phases of research in 2005, 2010 and 2018. The \"high-high\" concentration areas are in Lincang, Pu'er, Xishuangbanna, Honghe and Wenshan in the southwest and southeast, mainly located in the Irrawaddy River, Nujiang River, Lancang River and Panlong River Basins in the provincial water resources zoning. The \"low-low\" concentration areas are in Lijiang, Dali, Chuxiong, Zhaotong and Qujing in the north and East, mainly located in the Jinsha River (lower) basin. The change in agglomeration area occurred from 2000 to 2005, among which the \"high-high\" agglomeration was transferred to Dehong, Lincang, Pu'er and Wenshan, the \"low-low\" agglomeration was transferred to Dali, Lijiang and Zhaotong, and the \"high-low\" agglomeration changed to Kunming. There was no \"low-high\" transfer phenomenon in the study area, and there was no significant transition from low value areas to high value areas. It is worth noting that the \"low-low\" agglomeration areas in Kunming shrank significantly during this period. There is obvious spatial heterogeneity in the distribution of water conservation functions in Yunnan Province, and there are obvious differences between the north and the south. Specifically, the water conservation functions on the north and south sides of Hengduan Mountain, Wuliang Mountain and Ailao Mountain show different spatial agglomeration with high concentration, while the concentration in the central mountain area is low due to the complex and diverse terrain. In terms of spatial differences, the key improvement areas of water conservation function in Yunnan Province should focus on low value areas, especially Chuxiong and Zhaotong, which have been in low value areas for a long time. Among the key ecological functional areas, Wuliang-Ailao Mountain Biodiversity reserve should focus on strengthening the water conservation function of Yuxi and Honghe regions. The conservation of biodiversity in western Yunnan should pay attention to Baoshan. Except Dehong, other cities and prefectures in the Northwest Yunnan Plateau biodiversity protection and water conservation protection areas have not improved significantly.