The advantages and disadvantages of replacing high dam with low dam in hydropower station construction are analyzed.

The advantages of replacing high dam with low dam in hydropower station construction are: less engineering quantity, small submerged area, less difficulty in resettlement, short construction period and low cost;

The adverse effects of using low dam instead of high dam in hydropower station construction are: small storage capacity, small flood regulation capacity, low power generation and low guarantee rate of effective power generation time.

The advantages of using high dam in hydropower station construction are: large storage capacity, strong flood regulation ability, high power generation and high guarantee rate of effective power generation time;

The adverse effects of using high dam in hydropower station construction are: large engineering quantity, large submerged area, difficult resettlement, long construction period, high cost, difficult design, great threat to downstream and high geological requirements for dam site.

Extended data:

Matters needing attention in hydropower station construction:

1. Generally, water is replaced by the roof, and the outlet of hot and cold water must be horizontal. Generally, the left side is hot and the right side is cool, and the pipeline laying needs to be horizontal, vertical and firm. The layout should be safe and reasonable. The position of pipe clamp and the slope of pipeline shall meet the specification requirements. All kinds of valves should be installed in correct and upright positions for easy use and maintenance.

2. Inlet water shall be equipped with an indoor master valve. Before installation, check the water pipes and connectors for damage, sand holes and cracks.

3. The installation position of the water meter should be convenient for reading, and the distance between the water meter and the valve and the wall should be appropriate for easy use and maintenance.

4. If there are water softeners, water purifiers and kitchen treasures in the kitchen, it is necessary to consider reserving the location of water supply and water supply in advance.

5. The shower mixing valve is positioned right and left, installed in the middle of the bathtub (determine the size of the bathtub first), and the height is on the bathtub 150-200mm. The outlet of the jacuzzi is reserved according to the model. The hole spacing of the water mixing valve is generally kept at (concealed) 150mm and (exposed) 100mm, and the outlet position of the connecting rod shower should be determined according to the height of the room and the personal needs of the owner.

6. The water inlet and outlet of the toilet should be placed where it can be blocked by the toilet. One-piece toilet should be located at the outlet according to the model, and generally should be left at the middle of the lower outlet of the toilet 200 mm.

7. Electric water heaters generally need to be fixed on the load-bearing wall. If the situation is special, it needs to be fixed on the non-bearing wall, and there should be enough places on the top floor to fix it. Bian Xiao suggested that it is necessary to communicate with the water heater manufacturer in advance to determine the location of the water heater outlet.

8. When installing the water inlet and outlet of the water heater, the water inlet valve and air inlet valve must be considered and installed in corresponding positions.

9. When installing kitchen and bathroom pipes, the final size of wall tiles should be considered when the pipes leave the wall, that is, the thickness of wall tiles should be considered in advance.

10. When designing water pipes, the installation position of washing machine faucet and the layout of launching water should be considered. At the same time, pay attention to whether the location of the power socket is appropriate. Put the drum washing machine in the cupboard. Be sure to determine the size of the washing machine and kitchen cabinet in order to maintain a good water supply and discharge position.