从平面到立体:景观格局对风灾的影响OA

[Objective]To compare the explanatory differences between two-dimensional and three-dimensional landscape patterns for urban windstorm damage,identify key drivers and scale effects,and provide quantitative evidence for wind-disaster mitigation in dense coastal cities.[Method]Taking Shanghai as the study area,this study developed a landscape pattern indicator system integrating two-dimensional and three-dimensional characteristics.Multi-scale comparative analysis,Pearson correlation analysis,and random forest models were used to identify the key landscape pattern indicators affecting windstorm damage and clarify their scale dependence and spatial differentiation.[Result]Three-dimensional indicators showed stronger overall explanatory power for windstorm damage than two-dimensional indicators.Volumetric density(VD)contributed the most,while building density(BD)was the most important two-dimensional indicator.High VD combined with high BD corresponded to higher marginal contributions,and elevation moderated the effect of VD.The optimal analysis scale was 4 km,and VD>0.45 and BD>0.35 were identified as key risk thresholds.[Conclusion]The spatial differentiation of windstorm damage is mainly shaped by the urban three-dimensional landscape pattern,with effects showing scale dependence,nonlinear characteristics,and synergistic interactions among key factors.This study clarifies the main role of three-dimensional landscape patterns in windstorm risk,supports the shift of urban disaster-prevention planning from a planar to a volumetric perspective,and provides direct scientific support for resilience-oriented spatial planning in high-density coastal cities.