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INCREMENTAL INCREASE METHOD

INCREMENTAL INCREASE METHOD

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INCREMENTAL INCREASE METHOD

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  1. POPULATION FORECASTING INCREMENTAL INCREASE METHOD Incremental Increase Method

  2. Presented by Group 5: • SEECHURN Ashivan(ID no. 1013779) • BHOODHOO Pranesh Singh (ID no. 1016842) • JUGGURNATH Bhuveenesh (ID no. 1011316) • MUTTY Yagnesh (ID no. 1010926) • GOOLAB Muhafeez Mohammad (ID no. 1012799) • SEWDINE Deepin (ID no. 1012426) Incremental Increase Method

  3. Table of contents: • Introduction • Factors affecting changes in population • Population Forecasting • Incremental Increase Method • Example Incremental Increase Method

  4. Introduction The design of waste water treatment plant and sanitation scheme is based on the projected population of a particular area, estimated for the design period. Any underestimated value will make the system inadequate for the intended purpose while overestimation will make it costly. As over the years the population of the area is ever changing, the system should be designed by considering of the population at the end of the design period. Incremental Increase Method

  5. Factors affecting changes in population: • Birth rate (causes an increase) • Death rate (causes a decrease) • Migration (causes either an increase or a decrease) • Annexation (causes an increase) Incremental Increase Method

  6. Population Forecasting After collecting the present and past population record for the area (from census population records), the population at the end of design period can be predicted using various methods by considering the growth pattern of the concerned area. Incremental Increase Method

  7. INCREMENTAL INCREASE METHOD • This method is a modification of the arithmetical increase method and it is suitable for an average size town under normal condition where the growth rate is found to be in increasing order. • While adopting this method the increase in increment is considered for calculating future population. Incremental Increase Method

  8. INCREMENTAL INCREASE METHOD • The incremental increase is determined for each decade from the past population and the average value is added to the present population along with the average rate of increase. Hence, population after nth decade is given by Where, = Population after decade = Average increase = Incremental increase = Actual population Incremental Increase Method

  9. Example: Predict the population for the year 2021, 2031, and 2041 from the following population data using the incremental increase method. Incremental Increase Method

  10. SOLUTION Incremental Increase Method

  11. SOLUTION For year 2021: For year 2031: For year 2041: Incremental Increase Method