slugA Study of Population Density Distribution Pattern of Karachi City Using Spatial-Interaction Gravity Models (Sigms)
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2014, Vol 2, Issue 3
Abstract
Administratively, before the year 2000 Karachi was distributed in five districts. Afterwards, it was divided into eighteen towns. It gave rise to a great controversy that whether the 5-district system is administratively better or the 18-town system. A study of the population-area distribution of the Karachi city with reference to 5-district system and 18-town system is the basis of this study. Hoover Indices (HI) and Lorenz Curves (LC) are particularly utilized for the purpose. Comparing the outcomes we will be in a position to determine that which system is scientifically better. It is found that the patterns for 18-towns are better than the 5-district patterns. The town wise population density can be determined with the help various models. Spatial-Interaction Gravity Models (SIGM) and FGDM are utilized. These models are based on the selection of a suitable pivot point. Pivots can be selected on the basis of being either most dense or less dense. The system is studied with the help of both the approaches and the results are compared to conclude that selecting the least dense town as the pivot leads to better results. Spatial Interaction Model (SIM) is another model which is developed here to determine the population density distribution. It also utilizes the least pivot. It generates a distance gradient coefficient that determines the probability of change of the population density of the towns. SIM results confirm the results obtained by applying FGDM. For this purpose Spatial Interaction Logistic Model (SILM) is utilized.
Authors and Affiliations
Shaheen Abbas, Muhammad Rashid Kamal Ansari
Keywords
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