12:15 PM - 1:15 PM
[P-15] Concepts of Urban System's Resilience and a Mathematical Model
Keywords:Resilience, Absorptive capacity, Urban system, Mathematical model
Concepts of urban resilience have recently prevailed in both academic and practical discourse of disaster risk management. Urban resilience is generally considered as the ability of an urban system to recover or transform itself into a desirable state after a disaster causes damage to the system. Our society not only needs to improve mitigation measures, but it also has to enhance the ability in preparation to a next coming large-scale disaster. However, the concepts are used in a wide range of meanings, and which is sometimes confusing. In order to control urban resilience, the definition and mechanism must be clarified.
Hence, first of all, this study classifies the concepts into i)Stability, ii)Absorptive Capacity, and iii)Adaptability based on a review of the existing studies relating to urban resilience and gives a definition to each sub-concept. Stability is the ability to return to the pre-disaster state as soon as possible after a disaster shock. Absorptive capacity is the ability to absorb the damage and maintain the condition which the system can recover or sustain. Adaptability is the ability to recover the damage and adapt the change of socio-economic environment.
Secondly, this study focuses on Absorptive capacity and clarifies the relational structure between an urban system's features and its Absorptive capacity. A mathematical model to represent the dynamics of an urban system's state is built up, which is then used to explain the degree of Absorptive capacity. Moreover, by using the model, this study analyzes how the Absorptive capacity is affected by the change of parameter values relating to the system's features. Finally, we discuss the possibility to manage the urban system's Absorptive capacity based on the above analysis.
Hence, first of all, this study classifies the concepts into i)Stability, ii)Absorptive Capacity, and iii)Adaptability based on a review of the existing studies relating to urban resilience and gives a definition to each sub-concept. Stability is the ability to return to the pre-disaster state as soon as possible after a disaster shock. Absorptive capacity is the ability to absorb the damage and maintain the condition which the system can recover or sustain. Adaptability is the ability to recover the damage and adapt the change of socio-economic environment.
Secondly, this study focuses on Absorptive capacity and clarifies the relational structure between an urban system's features and its Absorptive capacity. A mathematical model to represent the dynamics of an urban system's state is built up, which is then used to explain the degree of Absorptive capacity. Moreover, by using the model, this study analyzes how the Absorptive capacity is affected by the change of parameter values relating to the system's features. Finally, we discuss the possibility to manage the urban system's Absorptive capacity based on the above analysis.