This model shows how the population of Durham Region changes over time using a logistic growth model. The Durham Region Population is the main stock and represents the number of people living in the region. The Change in Durham Population is the flow that represents the yearly increase or decrease in the population. The model uses a Human Maximum Birth Rate and Human Minimum Death Rate to determine population growth. The Durham Carrying Capacity represents the population level that the region could reasonably approach as growth slows. The model also includes a delay in the effects of population density, which represents the idea that changes in population density may take time to affect population growth. The starting population is approximately 800,000 people, and the values used in the model are approximate and intended to demonstrate population dynamics rather than make an exact prediction.
