What is the dividing line between high dam and low dam?

A high dam is a dam with a dam height greater than 70m.

A low dam is a dam with a dam height less than 30m.

The beneficial effects of using low dams instead of high dams in the construction of hydropower stations are: less engineering volume, less submerged area, less difficulty in resettlement, short construction period, and low cost;

The adverse effects of using low dams instead of high dams for hydropower station construction are: small storage capacity, small ability to regulate floods, low power generation, and small guarantee of effective power generation time.

The beneficial effects of using high dams in hydropower station construction are: large storage capacity, strong ability to regulate floods, high power generation, and a high guarantee rate of effective power generation time;

Using high dams in hydropower station construction The adverse impacts are: large project volume, large submerged area, difficult resettlement, long construction period, high cost, difficult design, great threat to the downstream, and high geological requirements at the dam site.

Extended information:

Hydraulic engineering dam definition standards: According to the height of the dam, it is divided into high dam, medium dam and low dam. Our country stipulates that dams with a height of more than 70 meters are considered high dams, dams with a height of 30 to 70 meters are considered medium dams, and dams with a height of less than 30 meters are considered low dams.

Notes on the construction of hydropower stations:

1. Generally, the water should be moved to the top instead of the ground. The cold and hot water outlets must be level. Generally, the left side is hot and the right side is cool. Pipe laying requires Horizontal and straight. The layout direction must be safe and reasonable. The position of the pipe clamp and the slope of the pipe should comply with the specification requirements. All types of valves should be installed in correct and level positions for ease of use and maintenance.

2. The water inlet should be equipped with an indoor main valve. Before installation, the water pipes and connecting accessories must be checked for damage, blisters, cracks, etc.

3. The water meter should be installed in a location that is convenient for reading. The distance between the water meter and valves from the wall should be appropriate and should be convenient for use and maintenance.

4. If you install a water softener, water purifier, kitchen appliance, etc. in the kitchen, you should consider leaving the water supply and drainage locations and the power supply location in advance.

Baidu Encyclopedia-Hydropower Plant