都匀市村域“三生空间”结构的时空格局

Spatial and Temporal Pattern of Level Production-Living-Ecological (PLE) Space in Village of Duyun City

为了实现县域更精细化的土地资源管理,促进喀斯特山区国土空间高效利用。基于都匀市2008年、2018年土地利用变更调查数据,采用土地利用主导功能分类方法构建都匀市村域"三生空间"分类体系,并采用5大计量模型方法计算空间格局指数,对都匀市"三生空间"功能结构的空间分布格局和时间变化特征进行了分析。研究表明:(1)都匀市村域"三生空间"多样化和信息熵指数呈东北部高,西南部低的分布格局,整体水平较高且呈上升趋势;优势度指数分布格局则相反,整体处于中等偏下水平且呈下降趋势;利用程度指数东西部差异较大,整体呈上升趋势,但仍处于中等偏下水平。(2)各行政村"三生空间"功能区位意义差异显著,西部地区生态功能区位优势突出,东部及南部地区生产功能区位优势突出,两类空间区位指数均呈下降趋势,北部城区中心生活功能区位优势突出,城郊地区上升明显。(3)都匀市"三生空间"功能结构变化空间分异明显,位于城郊的行政村"三生空间"结构变化显著,城区中心次之,西部及南部经济条件差的行政村未发生明显变化,保持相对稳定状态。研究可为都匀市新一轮的国土空间规划提供科学参考。

In order to realize the refined management of land resources in counties and to promote more efficient national spatial in karst mountainous area, based on the survey data of land use change in Duyun City in 2008 and 2018, we employed the dominant function classification method of land use to construct a classification system of the village-level production-living-ecological(PLE) space in Duyun City, and used five measurement model methods to calculate the spatial pattern index, and analyzed the pattern of spatial distribution and characteristics of temporal changes in the functional structure of the PLE space there. Findings of the research are listed follows.(1) In terms of the functional structure of PLE space, the northeastern area had a higher diversification and information entropy index than the southwestern area, while the overall level was high and showed an upward trend;the distribution pattern of dominance index showed the opposite situation, namely, being at barely medium levels and on a downward trend;the utilization index varied greatly in the eastern and western areas, showing an upward trend on the whole, yet still remained at barely medium levels.(2) The functional location significance of PLE space differed greatly in administrative villages, with the western area possessing an obvious location advantage in the ecological function and eastern and southern areas possessing an obvious location advantages in the production function, yet the indexes of both space types showed a downward trend;the northern downtown area displayed a distinct location advantage in the living function, while the advantage of suburban area was significantly increasing.(3) There was a significant spatial variation of the structure change in the PLE space of Duyun;the structural changes of administrative villages in the suburban area were the most significant, followed by the downtown area, while no significant changes had been observed in poorer administrative villages in the western and southern area, PLE space remained in a relatively stable state. These research results can provide the scientific basis for the new round of national spatial planning in Duyun.