POPULATION FORECASTING
Since the water
supply systems are designed for a certain design period, instead of
present
pop...
The formula is;P_future=P_last+(Ka) (t_future-t_last)
and Ka
of 2

Population forecasting

population problem
Published on: Mar 4, 2016
Published in: Self Improvement      
Source: www.slideshare.net


Transcripts - Population forecasting

  • 1. POPULATION FORECASTING Since the water supply systems are designed for a certain design period, instead of present population, population expected in the design period must be considered in the design of water supply systems (A)Short term methods; Arithmetic progression  Geometric progression .ller Bankası method  Decreasing rate of increase  .Graphical extension (B)Long term methods; (1)Comparative method (2)Ratio & correlation method (3)Component method (4)Logistic method (mathematical curve fitting (1)ARITHMETIC PROGRESSION; Rate of population increase is constant and expression is dp/dt=Ka Where K is an arithmetic constant
  • 2. The formula is;P_future=P_last+(Ka) (t_future-t_last) and Ka

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