Research on layout optimization of Industrial land based on space safety diagnosis: Case study of Beichen district, Tianjin

Beichen district of Tianjin, located in the important node of Beijing-Tianjin golden corridor and high-tech industry area of Jingjintang region, has strong industrial foundations, while it is still faced with the problems that traditional industries account for high proportion of the industrial structure, inefficient use of industrial land, lack of enterprise innovation ability and shortage of resources, etc. With increasingly competitive between cities and regions, upgrading of an industrial structure and spatial distribution optimization become the inevitable trend, which will become a really hotspot issue that attracted widespread attention from domestic and international experts and scholars who engaged in the field of economics, geography, science and ecology planning, and so on. Therefore, this paper, taking perspectives from industrial land structure and distribution security, employing some quantitative analysis methods such as GIS spatial analysis, mathematical model and statistic analysis, combining with the present industrial development of Beichen district, drawing lessons from the study on the evaluation of land intensive use and land suitability evaluation by other scholars, builds an index system of industrial land safety diagnosis from the five aspects of natural location, economic foundation, social coordination, ecological security and policy support, which have more important effects on the distribution of industrial land, and it comes up with the multi-source data multistage evaluation framework with the idea of “red line controlling for first screening-single factor evaluation-spatial association analysis” in order to conduct diagnostic evaluation of industrial land security distribution, drawing the classification map about each factor which influenced industrial safety layout on Beichen district. Finally, we get the space safety layout area of Beichen district industry by using the evaluation result to do overlay analysis when the land use control chart and the red line control zones were digitized by ArcGIS, and achieve security hierarchy industrial land layout of Beichen district. The results show that safety degree of Beichen district industrial land layout is just at an ordinary level, even some industrial points are still within the scope of red line control area. It is necessary to optimize the spatial layout of the industrial land in consideration of reasonable industrial land scale in Beichen district, and to realize coordinated development between industrial land, regional society, economy and environment. Besides, the result could provide a basic reference for Tianjin land bureau and related planning department to make an objective evaluation on land resources and make an effective use of the land.