Botkin et al developed a individual tree based model of forest dynamics by using the methods of forest growth and yield model, depending on gap theory of forest dynamics. This type of model called Gap Model was widely used in many different forest types world wide, such as boreal forest, warm temperate deciduous broad leaved forest, subtropical forest and tropical forest. Gap Model can be used as tool to probe into theory of forest dynamics in landscape and regional area on long term forest developme...