The diagram elucidates the evolution of a town after the construction of a hydroelectric power dam throughout the period between 1990 and 2010.
Overall, the town underwent significant alterations. The most noticeable modifications were the demolition of ancient structure, wildlife, and farmland, and the addition of modern new infrastructures.
In 1990, a long river running along the town divided this zone into two parts along with the mountain at the end of the road. A forest was located in the top corner in the northwest of the town, while the ancient structure was directly across from that to the West. There were also some mountains on the two sides of the river in the southwest and southeast, which is home to rare plants and animals mainly in the west. Meanwhile, many irrigated farmlands occupied in the northeast, which was positioned adjacent to ancient structure. Parallelly, the villages were established beside the farmlands, which is convenient for farmers to focus on their work.
In 2010, although the river still remained the original position, there was an additional appearance of reservoir on the top. Therefore, the forest and ancient structure were knocked down to make way for the construction of a big lake, with a hydroelectric dam in front of. The place where plants and animals inhabited was replaced by some electric poles in the southwest. The irrigated farmlands were also demolished to build hotel and some other power poles. The former position of villages still remained unchanged.