Showing posts with label Demographic Study. Show all posts
Showing posts with label Demographic Study. Show all posts

Saturday, October 26, 2019

Demographic Study


Relevance of Demographic Studies in Land Use Planning
       The center of all our planning effort is the people. We are much concerned about their various current and future needs. These growing needs for goods and services spell the need to determine specific and sufficient spaces for land and their efficient uses for the people to experience quality of life. One must also understand that it is the people that cause environmental and land use issues and problems. It is also the people that have the capacity to manage the resources.
       To ensure that this demand for land will be efficiently addressed, it is important that demographics should be carefully studied, specifically, the current figures, the characteristics or attributes of the population of a particular area, its growth and movement or trend, as these shape land uses encompassing years and decades.
       To come up with various alternatives and decisions in land use planning, knowledge about the demographics by the planners and the community will be most useful.

Population Projection
       Population projection is necessary to determine the trend in increase of population in the coming years, say five or ten years or more. This is important so as to determine the corresponding increase in demand for economic goods, social services, infrastructures support and land for various uses. With these calculations, planners and the decision-makers will be able to make some assumptions as to what will be the issues and concerns that would crop up in the future and as early as today prevent such future problems. These will also help them assess as to how much resources or fund should be raised to efficiently address such future needs. In other words, population projection helps planners and the decision makers come up with a solution before the arrival of a problem.

Two methods for Projecting Future Population
          There are different methods of projecting future population. However, the HLURB CLUP Guide suggests the combined use of Geometric and Participation Rate methods as discussed below:

a. Geometric Method is a computation of three factors including the base population, time interval and population after the given time interval using the formula, Pn = Po (1+r)t where Po = base population of an area, Pn = population of the area t years later, t = time interval in calendar year between Po and Pn , and r = growth rate of population per unit time. To compute growth rate, the formula can be rewritten into, r =( ln [Po / Pn]) / t.
b. Participation Rate Method uses ratio or percent share of a population segment of population to total population as indicated on the sample formula, Participation Rate of working group = Population of 15-64 y. o. / Total Population
Source: CLUP Guidebook Volume 2, 2014, p.183


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