Another attempt was made to calculate the future expected of

solid waste in Sulaymaniyah city for the year 2032. This method was built

through calculating the expected population for each specific year as well as

the rate of increment for waste generation rate in Sulaymaniyah city, which was

0.013 (kg / capita. day). Generation rate of solid waste for each year was

entered in the equation (3.18) of this method in order to fulfill many factors

such as improving standards of living in study area and increasing levels of

commercial and industrial activities in urban areas. This attempt was based on

the fact that waste generation rates in 2009 and 2016 (Sulaymaniyah directory

of municipality) to calculate the increment for waste generation rate as

follows:

Where:

GRW:

Generation rate of solid waste kg / (capita. day).

Qs:

Quantity of solid waste for one year (kg).

P:

Population of city for one year.

The rate of increment for solid waste generation rate of Sulaymaniyah

city was 0.013 (kg /capita / day) (RGI) based on values of waste generation

rate in 2009 and 2016 is:

Where:

RGI:

Rate of increment for waste generation rate.

GRW2016:

Generation rate of solid waste was 0.794 (kg / capita / day) of year 2016

(Sulaymaniyah directory of municipality).

GRW2009:

Generation rate of solid waste was 0.69 (kg / capita / day) of year 2009

(Sulaymaniyah directory of municipality).

n:

Period (years).

The population for each year from 2016 until 2032 was

calculated as follows:

Eq. (3.16) is used to calculate the generation rate of solid

waste for year 2032 or specific year (GRSW) based on present generation rate of

solid waste for year 2016 from Eq. (3.13) and rate of increment for waste

generation rate of each year from Eq. (3.14), this equation similar to equation

that used by (Al-Rawi and Al-Tayyar, 2012).

Where:

GRSW:

Generation rate of solid waste for each year.

GRW:

Present generation rate of solid waste for year 2016 from Eq. (3.13).

RGI:

Rate of increment in waste generation per year from Eq. (15).

n:

Number of year.

The quantity of waste (Qs) produced each year till year 2032

was based on generation rate of solid waste for specific year (GRSW) from Eq.

(3.16) and future population for specific year (Pt) from Eq. (3.14) was

calculated as:

Or

Qs:

Quantity of waste produced each year (tonne).

The cumulative quantity of solid waste generated by 2032 can

be calculated as:

Where:

Qs

(c): Cumulative quantity of solid waste for the specific year (tonne).

Qs

(ct): Quantity of solid waste for the specific year (tonne).

Qs

(ct-1): Cumulative quantity of solid waste for the last year before specific

year (tonne).

– For example the cumulative quantity of solid waste in 2032

Qs(c) is equal to the quantity of solid waste produced in 2016 Qs(ct) from Eq. (3.18) by adding the cumulative quantity of solid

waste in 2031 Qs(nt-1) to quantity of solid waste in 2032, accumulatively from

year 2016 until 2032, the increment is done through adding the value of current

year to past year until year 2032 as: