Topic: Future city population and charcoal consumptionSubscribe | Previous | Next
Chibulu Luo 4/12/2017
Hello,
I am trying to determine urban charcoal consumption in Zambia to 2100 based on future city populations. While the tutorial documentation uses a population growth rate , I'd like to use specific population data. I have the data for future city populations, and want to use an expression to show that charcoal consumption will increase with future population. For example, if the urban population today is 5 million, and will grow to 15 million in 2030, I want charcoal consumption to increase correspondingly.
How can I do this? Do I have to use the interp function for this?
Thank you,
Lulu
Emily Ghosh 4/12/2017
1 Like Hi Lulu,
Yes, you can use the Interp function to specify current and future populations.
Your expression can also include a growth rate to calculate future populations beyond the last specified year. This is useful if the model's End Year (inputted in Basic Params) is later than the last year specified in the expression. If a growth rate is not included, LEAP will assume zero growth. Example expressions might look like this:
With growth rate: Interp(2017, 5000000, 2030, 15000000, 8.8%)
Without growth rate: Interp(2017, 5000000, 2030, 15000000)
For more information on the Interp function, refer to the following help page: https://www.energycommunity.org/Help/Expressions/Interp.htm
Thanks,
Emily
Emily