Natural resource ecological risk assessment and characterization of spatial and temporal leaps in the pearl river delta urban agglomeration in the context of high-quality development

doi:10.13474/j.cnki.11-2246.2025.0727

Abstract

Abstract: Coordinating the relationship between urban development and natural resources ecology is a major issue considered in the context of high-quality development.In this paper,by constructing the driver-pressure-state-impact-response (DPSIR) natural resources ecological risk evaluation index system,combining the Gray-TOPSIS multi-objective decision-making evaluation methodology and exploratory spatio-temporal data analysis meth-odology,we analyze the natural resources ecological risk of the pearl river delta urban agglomeration.The spatio-temporal pattern and its spatio-temporal leap evolution characteris-tics are analyzed.The study shows that: ①More than three quarters of the cities in the PRD economic circle will experience a gradual decrease in natural resource ecological risk from 2012 to 2022,but more than half of the cities will experience medium risk and above,with an overall high level of risk. ②The eastern and southern parts of the PRD urban agglomeration exhibit more dynamic spatial structural characteristics,and the northwestern part of the urban agglomeration will be more influenced by neighboring cities,with a greater spatial and temporal influence on the level of risk of natural resources.Neighboring cities,with stronger spatial and temporal dependence,and more than 50%of the cities' natural resource ecological risks show strong spatial integration in the evolution of spatial patterns.③The spatial cohesion of Moran's I is only 11.11%,indicating that the ec-ological security level of each city in the PRD urban agglomeration has a large pattern of change,and its own relative position is prone to change.

Key words: ecological risk assessment, Gray-TOPSIS, exploratory spatio-temporal data analysis, Pearl River Delta city cluster

CLC Number:

P208

WANG Nan, CHEN Min, LIU Jiamin, WU Hui. Natural resource ecological risk assessment and characterization of spatial and temporal leaps in the pearl river delta urban agglomeration in the context of high-quality development[J]. Bulletin of Surveying and Mapping, 2025, 0(7): 164-168.

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