University of Twente Student Theses


Using Agent Based Simulation to Model Informal Growth of Infrastructure

Vahidi, Hossein (2010) Using Agent Based Simulation to Model Informal Growth of Infrastructure.

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Abstract:settlements are rapidly developing regions which are suffering severely from the lack of legal supervision. Informal settlement growth is a complex phenomenon causes by different dynamics. These dynamics influence each other, which increases the complexity of the system. The construction of buildings in these settlements (housing) and the growth of infrastructure are two main components of the informal development of the settlement which influence each other over time. Some studies have been done to understand the mechanism of informal growth of settlement, but not enough attention has been paid to study the informal growth of infrastructure dynamic. This research aims to extend an already existing (agent-based) housing model with a vector based model for microscopic simulation of infrastructure growth, using an agent based technique with a case study for an informal settlement in Dar es Salaam, Tanzania. The driving forces and characteristics of the informal infrastructure growth are studied to understand the complex patterns which emerged in the context of informal infrastructure. Analyses are grouped into three categories: the relationship between infrastructure and environment, the geometric relationships in infrastructure and the relationship between buildings and infrastructure. Existing infrastructure was classified into four types of infrastructure (formal, collectors, local trails and personal trails) and analyses were done for each infrastructure type. The results of these analyses show that different types of infrastructure show different characteristics. Based on these findings, two different mechanisms of infrastructure growth were identified. The first mechanism which plays the main role in the formation of infrastructure inside the informal settlement is based on the needs of the residents for providing accessibility to the higher ranks of infrastructure. The second mechanism develops the infrastructure based on the needs of the residents to reach different destinations to perform their daily activities. A conceptual model was developed that includes these two mechanisms. To evaluate the possibilities of implementing this conceptual model some prototype tests were conducted. Keywords: Agent based modelling, Informal settlement, Infrastructure growth, Trail formation, Infrastructure pattern.
Item Type:Essay (Master)
Faculty:ITC: Faculty of Geo-information Science and Earth Observation
Programme:Geoinformation Science and Earth Observation MSc (75014)
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