1) Area constraint: The total area of planting must not
greater than the available area.
where si is the area required to plant tree i and A is a total
available area.
2) Singularity constraint: Only one tree can be planted at
only one position.
3) Carbon sequestration constraint: The total amount of
carbon sequestration by all trees must greater than the
required amount of carbon absorption where L is an amount of required carbon sequestration
4) Tree distribution constraint: This constraint ensures a
distribution of trees throughout the area. In addition, the
similar type of tree should not grow next to each other
since its growth rate can be harmful
5) 0-1 Integer constraint: All decision variables are either
zero or one