“三生”视角的长江岸线功能格局演变分析——以重庆段为例

Analysis on Spatial Evolution of Ecological-Production-Living Coastline of the Yangtze River——Take Chongqing Section as an Example

基于土地利用数据,从“三生”(生产、生活、生态)空间视角出发,提出了“三生”岸线定量提取方法,并在此基础上采用转移矩阵、生态环境质量指数等方法,探究长江重庆段沿线“三生”空间及“三生”岸线的时空特征与生态效应,并运用冗余分析(RDA)研究“三生”岸线变化的影响因素.结果表明:①受自然和区位条件的影响,各地区对长江周边土地的开发利用强度差异明显,呈现西南高、东北低的空间格局;②2009-2018年10年间,“三生”岸线中生态和生产岸线减小、生活岸线增加,增长率分别为-3.09%、-4.71%和19.89%;③总体上生态岸线保有率较高,但两岸整体生态环境质量指数略有下降,其中城市是下降最为明显的区域,乡镇地区则是岸线保护的薄弱环节;④地形地貌是岸线开发的限制因素,而社会经济的影响是短期内岸线格局发生变化的主要驱动力,人为开发活动是造成岸线生态环境质量下降的主要原因.

Based on the land use data of 2009 and 2018,the spatio-temporal characteristics and eco-environmental effects of ecological-production-living spaces and ecological-production-living coastline along the Chongqing section of the Yangtze River were explored by means of transfer matrix,and eco-environmental quality index.The influencing factors behind the changes were also discussed in the method of Redundancy Analysis(RDA).The results show that:1)The intensity of land development in various regions is significantly different due to the influence of nature and location conditions,which is higher in the southwest and lower in the northeast.2)From 2009 to 2018,the total amount of ecological space was relatively stable,the agricultural space showed a downward trend,while the industrial space and the living space increased rapidly.Ecological and production coastlines have decreased,and living coastlines have increased,with growth rates of-3.09%,-4.71%,and 19.89%respectively.3)The overall eco-environmental quality index on both sides of Yangtze River has declined slightly,among which city area were decline significantly,while the township areas were the weak link in coastline protection.4)Terrain and landform affect the growth of vegetation and restrict man-made development activities to a certain extent.The changes in the spatial structure of ecological-production-living coastlines are inseparable from the impact of social economy.