What does backwater mean?

The meaning of backwater is as follows:

Basic explanation of water intake:

1, let the water fall back.

2. Dialect. Sluice.

Detailed description of water intake:

1, let the water fall back.

Previously on the legacy of Xuanhe: "The higher the water potential, the more peaceful the city is. Hui Zong went out of the yellow list and told people to retreat. "

2. Dialect. Sluice.

Jiefang Daily: "In order to solve this difficulty, a backwater was built along the city. When there is no need for water or too much water, open the' backwater' and let the water retreat from here. " ?

Backwater, dialect, means sluice. Sluice refers to a low-head hydraulic structure built on rivers and canals, which uses gates to control flow and adjust water level. Closing the sluice can hold back flood and tide or raise the upstream water level to meet the needs of irrigation, power generation, shipping, aquatic products, environmental protection, industry and domestic water; Opening floodgates can release floods, waterlogging, abandoned water or waste water, and can also supply water to downstream rivers or channels. In water conservancy projects, sluices are widely used as structures for retaining water, draining water or taking water.

Sluices can be divided into control sluice, intake sluice, sediment sluice, flood diversion sluice, tidal sluice and drainage sluice according to their main tasks. According to the structural form of the lock chamber, it can be divided into open type, breast wall type and culvert type. When the open sluice is fully opened, the water flow is smooth, which is suitable for sluice with mission requirements such as flood discharge, ice discharge, crossing trees or floating objects. This form is often used for control sluice and flood diversion sluice.