The reason why high school geography dam is not high

The investment is huge and the area submerged by the reservoir is also large. The dam is too high. Regardless of the difficulty of construction, the advantages include large flood storage capacity, large power generation, and improved navigation conditions. But the shortcomings are also obvious. The investment is huge, a large number of immigrants are needed, and the area submerged by the reservoir is also large. When China built the Three Gorges Dam, it had three options: low dam, medium dam, and high dam. After weighing the pros and cons, it chose the third option, the medium dam. This option can not only ensure power generation and navigation, but also maximize flood control and storage. . Moreover, the amount of economic investment and immigration is within China's affordability.