多元价值兼顾下的旧城镇更新的土地资源价值评估研究--以广州市番禺区旧城镇为例

Study of Land Resource Value Assessment for Old Town Renewal under the Multiple-value Approach:A Case Study of the Old Town of Panyu District,Guangzhou City

社会型城市更新应兼顾多元价值,同时考虑物质空间要素的迭代优化及非物质空间要素的保育利用。当前更新改造规划并未充分考量非物质空间要素,导致旧城更新实践上的文化保护“拆”“留”两难。从多元价值兼顾的视角实施更新地区的土地资源价值评估,有助于推动更新规划走向社会型城市更新。以广州市番禺区旧城镇为例,分析旧城镇更新的历程和困境,基于多元兼顾的视角构建旧城镇更新改造规划的土地资源价值评估工具。运用多源大数据及实地调研数据,采用空间分析、语义分析等方法,基于必然认定项及低效评价指标体系,筛选需迫切改造的旧城资源进入更新资源数据库;然后基于文化、居住、产业三维度的多元价值评估体系,将数据库的旧城资源进行价值评估和分类分区。此后,对不同类型的旧城资源分别提出更新指引。探讨了结合物质空间要素指标和非物质空间要素指标的土地资源价值评估工具创新,以期为多元目标下的旧城镇改造提供思路借鉴。

Socio-urban renewal should take into account multiple values,and at the same time consider the iterative optimisation of material spatial elements and the conservation and utilisation of non-material spatial elements.Current renewal planning does not fully consider non-material spatial elements,which leads to the dilemma of demolishing and retaining cultural protection in the practice of old city renewal.The implementation of land resource value assessment in renewal areas from the perspective of multiple values can help promote renewal planning towards socio-urban renewal.Taking the old towns of Panyu District in Guangzhou as an example,the study analyses the history and dilemmas of old town renewal,and constructs a tool for assessing the value of land resources in the renewal planning of old towns based on a multiple-value perspective.Multi-source big data and field research data,spatial analysis,semantic analysis and other methods are used in this study.Based on the inevitable identification items and inefficient evaluation index system,old town resources in urgent need of renewal are screened and entered into the renewal resource database.Meanwhile,based on the multivariate value assessment system of culture,residence and industry,the old town resources in the database are evaluated and classified into zones.After that,the study proposes guidelines for the renewal of different types of old city resources.The study explores the innovation of land resource value assessment tools combining indicators of physical and non-physical spatial elements,with a view to providing ideas for the transformation of old towns under multiple objectives.